2026 Thailand Residential and Small Commercial Solar Training Manual

This edition keeps the same structure as the Chinese manual and is intended for onboarding, cross-country collaboration, and day-to-day reference.

Strategy overview: Why do we build household + small commercial photovoltaics in Thailand, and how long can we do this?

1.1 Why: Why do it now instead of waiting two years?

From an operational logic point of view, the establishment of household and small commercial photovoltaics in Thailand does not rely on a single policy, but on the superposition of four conditions: first, the daytime load dominated by air conditioning really exists; second, the retail electricity purchase price is significantly higher than the long-term cost of electricity of rooftop photovoltaics; third, the grid-connected rooftop system already has a sufficiently mature standardized equipment and installation system; fourth, tax incentives and market education will be significantly accelerated starting in 2026, allowing customers to switch from "watching the excitement" to "seriously comparing plans."

For household customers, the real driving force is not to sell excess electricity, but to replace the most expensive daytime retail electricity first. For small commercial customers, the driving forces are more towards stable cash flow and predictable operating costs. In other words, the core of this business is not how much electricity is generated, but how much electricity is replaced that had to be purchased at a high price.

Judging from public information, PEA has announced that the current Ft from May to August 2026 is0.1623 THB/kWh; In the MEA/PEA electricity price system, the electricity bill consists of the basic electricity price, Ft and VAT. In other words, what the customer actually pays is not a single static number of "a few dollars per degree", but a dynamic structure that adjusts with Ft. Ft is reviewed every 4 months, which makes "locking in some future electricity costs" inherently business sense.

Therefore, the Thai market is not a market that can only be driven by stories, but a market that can already be measured using bills, loads, Ft adjustment cycles and system power generation. If you can explain the calculation clearly, you can make the transaction and delivery stable.

1.2 What: What is this business essentially selling?

If you understand this business as "selling components," you will ultimately be able to compete with the lowest price; if you understand it as "selling power generation," you will overemphasize the theoretical annual power generation; but if you understand it as "reconstructing electricity bills for customers in the next 10-25 years," your sales, design, construction, after-sales, and financial logic will be unified.

For household customers, the essence of the product is a 'home energy cost management tool'; for small commercial customers, the essence of the product is an 'electricity bill hedging tool during business hours'; for future EaaS/EMC, the essence of the product will become a 'long-term energy service contract'. The same roof system represents different things under different business models; first understand this difference clearly, so that the subsequent sales, delivery and operation and maintenance logic will not be confused.

Therefore, when understanding this business, the focus should not be on ‘we sell the best brand’, but on: we use standardized equipment, standardized processes and standardized delivery to help customers turn part of their future electricity bills from fluctuating expenses into manageable, predictable and trackable long-term costs.

1.3 Who / Where: Who should we target, which areas and customer groups should we prioritize?

Your business structure is already very clear: 80% residential, 20% small commercial. Therefore, the organizational design must be centered around high-quality user transactions, rather than based on the thinking of large-scale industrial and commercial EPC. The highest priority customer group is not all "people who want to pretend", but those who have a stable daytime load, are willing to hold the property for a long time, have requirements for aesthetics and after-sales service, and are willing to understand the logic of the plan.

Regionally, priority should be given to areas with heavy air-conditioning loads, high densities of villas and low-rise residences, and small and medium-sized businesses with long business hours during the day. Bangkok and its surrounding areas are more suitable for high-quality household and small commercial demonstrations; tourist and villa-type areas are more suitable for high-net-worth households and short-term rental properties; and the surrounding industrial belt is more suitable as a reserve market for small commercial and light factories.

In terms of customer group priority, it is recommended to filter at three levels: Category A is for high-net-worth self-occupied villa customers who have people at home or working during the day; Category B is for customers with stable business load during the day such as clinics, stores, B&Bs, small workshops, etc.; Category C is for customers with battery, EV or EaaS potential in the future. The priorities of different consultation objects are not the same. What really matters is the screening ability.

1.4 When / How long / How: How long is the window, how do we get things done?

If you ask how long this thing can be done, the answer is not a simple year, but a window judgment. As long as Thailand's air conditioning load remains strong during the day, the cost of retail electricity purchase is significantly higher than the long-term cost of self-built rooftop PV, grid-connected equipment continues to be standardized, and customers' concern about the stability of electricity bills does not decrease, this market will not disappear in the short term. What will really disappear is the profit window for extensive installers, not the industry itself.

From the perspective of business rhythm, the next three years will be more like the stage of ‘standardized building capabilities’: customer education continues, tax incentives increase willingness to consult, financing and EaaS are just beginning to have room for discussion, but the difference in organizational quality will quickly widen. In other words, now is not the time to focus on the story, but the time to focus on the process, craftsmanship, explanation ability, and completeness of the data.

How do you get this done? The answer is four things in parallel: First, use the Chinese supply chain to stabilize costs and delivery times; second, use Japanese craftsmanship to stabilize details and rework rates; third, users use consultative sales to screen projects correctly; fourth, use data and data accumulation to prepare for future EaaS/EMC. If the training outline cannot thoroughly cover these four points, the following chapters will fall apart.

Chapter 1: Hard-core interpretation of Thailand’s electricity market, Ft, TOU, grid connection and Decree No. 805

1.1 What exactly is Ft and why every salesperson must be able to speak it

MEA’s official definition of Ft is very clear: Ft is a variable electricity price item formed based on the automatic price adjustment mechanism, which is used to reflect cost adjustments caused by changes in fuel costs and power purchase costs in addition to the basic electricity price. It is not an 'additional tax', nor is it a concept casually mentioned by an installer, but a real part of Thailand's electricity tariff structure.

The official MEA page further explains that the full name of Ft isFuel Adjustment Cost at the given time, regularly monitored by the energy regulator and reviewed as a 4-month average, usually adjusted in January, May, and September. In other words, changes in Ft will directly affect user bills, and rooftop PV is established precisely because it can hedge part of the electricity purchases that will become more expensive as Ft fluctuates.

PEA’s latest Ft page shows that the current Ft from May to August 2026 is0.1623 THB/Unit. This number by itself does not equal the customer's full electricity price, but it tells us one important thing: the customer's final bill is not static. If a new employee cannot even explain Ft clearly, it will be difficult to explain to customers why photovoltaics does not only look at today's electricity price, but also looks at the power purchase structure in the next few years.

Therefore, the correct expression of the first-line language should be: Thai customers’ electricity bills are not only the basic electricity price, but there is also an Ft item in the bill that is adjusted regularly. The value of rooftop photovoltaics to customers is not only immediate savings, but also locking in part of the future electricity purchase costs that would otherwise be affected by Ft.

1.2 What is TOU and which customers are worthy of TOU?

TOU is Time of Use, which means billing by time period. PEA’s English electricity price manual clearly gives the TOU period:Peak is Monday to Friday 09:00-22:00，Off-Peak is Monday to Friday 22:00-09:00; Saturdays, Sundays and certain legal holidays will be treated as Off-Peak all day. For PV sales, the significance of TOU is to explain why daytime power generation overlaps with high daytime electricity prices, which amplifies system value.

Taking PEA's current English manual as an example, the TOU energy prices for residential and small general services (Schedule 1.2 / 2.2) at voltage levels below 22kV are stated asPeak 5.7982 THB/kWhandOff-Peak 2.6369 THB/kWh, in addition to superimposing Ft and VAT. This structure is very suitable for explaining why the same kilowatt-hour of electricity is more valuable when replaced during the day than at night.

However, not every client should cut their TOU to ‘sound professional’. There are usually two types of customers suitable for discussing TOU: the first type is household customers whose load is obviously high during the day and wants to accurately manage their bills; the second type is small commercial customers whose business hours are concentrated during the day and who intend to do more precise calculations. For ordinary customers who have a stable load but have no preference for the complexity of electricity meters and bills, getting the system right first does not necessarily require forcing a TOU immediately.

Salesmen should avoid two misunderstandings when explaining the TOU: First, they deify the TOU as "if you change it, you will definitely save money"; second, they make the TOU too complicated and make customers lose their willingness to understand. The correct expression is: The value of TOU lies in allowing high-priced electricity during the day to be more clearly replaced by photovoltaics; whether to switch depends on customer load, electricity consumption habits and bill structure, rather than one-size-fits-all.

1.3 Why is it suitable for household/small commercial use: from billing to project screening algorithm

Training cannot just tell newcomers, "Thailand has good lighting, so photovoltaics are installed." This statement has almost no screening value. A more effective expression is: under the condition that the daytime load is obvious and the retail marginal power purchase cost is higher than the long-term LCOE of the system, households and small businesses have natural adaptability.

The first judgment for household projects is not ‘how much can be installed’, but ‘how much can actually be consumed from 09:00-16:00’. For example, if there are people at home during the day, the air conditioner is always on, the swimming pool pump is running, telecommuting, and charging loads are present, the spontaneous self-use rate of such customers is usually more supportive. For small businesses, it depends on whether the business hours coincide with the daytime power generation period, such as clinics, restaurants, stores, B&B front desks, offices, etc.

At the entry stage, a simple screening algorithm can be directly applied: first collect the bills of the past 12 months; then determine the daytime on-site load; then estimate the annual power generation of the candidate system; then calculate the annual savings based on the conservative spontaneous self-use rate range; and finally discuss whether to expand the system and consider energy storage or TOU. Only in this way can project screening be changed from 'feeling good' to 'making informed judgments'.

1.4 Royal Decree No. 805: What was given, do not turn it into a myth

One of the policies most worthy of internal unification in 2026 is Royal Decree No. 805 B.E. 2569. Public interpretations unanimously pointed out that this decree contains two types of incentives that are helpful to the photovoltaic-related market: one is personal income tax relief for residential rooftop photovoltaics; the other is tax incentives for investment in energy-saving equipment and high-efficiency equipment.

From the 2026 public interpretations of BDO, BizWings, Nation Thailand, etc., several points that must be mastered at the training level can be summarized. First, the residential part isActual expenses incurred, upper limit 200,000 THBPersonal income tax exemption; second, the rooftop system must be grid-connected and successfully connected to the MEA or PEA power grid; third, the discount does not automatically arrive upon installation, but is related to the customer's tax entity, filing year, completed grid connection, documents and qualifications.

The same type of public interpretation also mentioned that there is a 50% tax deduction/interpretation caliber that can be understood as a total 150% pre-tax deduction effect for investments in high-efficiency and energy-saving machinery and equipment by enterprises or specific entities. However, this part is more suitable for small commercial and industrial and commercial scenarios, and must be submitted to tax consultants for approval, and is not suitable for front-line sales to make deterministic commitments on their own.

Therefore, the real value of Decree 805 to sales is not to ‘quote a rebate figure’, but to let customers know: within the policy window of 2026-2028, the Thai government has indeed given more friendly tax treatment to investment in residential grid-connected rooftop photovoltaic and energy-saving equipment. But whether it can be used, how to use it, and how much it can be used depends on the customer's own application qualifications and information closure.

1.5 Industrial and commercial/enterprise tax incentives: What exactly is the 1.5 times deduction, and what is its relationship with “enterprises installing photovoltaics”

This is the most easily misunderstood section of the first chapter and the most worthy of correction. According to the official press release and new law page of the Thai Revenue Authority in 2026, in addition to personal income tax exemptions for residential rooftop photovoltaics, Decree 805 also introducesEfficient machinery, equipment and energy-saving materialstax measures. The official press release clearly states: Eligible individuals (income categories 40(5)-(8)) and companies/partnerships can apply for1.5 timesDeduction of investment expenses can be understood as deducting an amount equivalent to the actual investment on the basis of normal costs/depreciation.50%income tax exemption effect.

But the boundaries must be clarified: the official statement is "high-efficiency machinery, equipment and energy-saving materials", and it does not directly read "150% tax deduction for all industrial and commercial photovoltaic projects" in one sentence. Therefore, the correct expression for corporate customers should be:If the project involves energy-saving equipment, machinery or materials that meet the DEDE/EGAT 5-star energy efficiency label certification and meet the regulations of the tax bureau, the logic of 1.5 times investment deduction or 50% additional income tax reduction may be applied; the specific scope of application needs to be further determined based on the nature of the equipment, invoice, operational status and tax entity.

what does that mean? This means that commercial and industrial sales cannot mix residential solar tax breaks and business energy-saving equipment deductions into the same policy. Nor can we simply say, ‘Enterprises can get 150% tax deduction as long as they install photovoltaics’. The mature training caliber should be: There are more attractive energy-saving investment tax policies for industrial and commercial customers, but it must be confirmed whether the equipment belongs to the officially recognized category, whether it has obtained the corresponding energy efficiency label, whether it meets the e-Tax Invoice, whether it is new equipment, whether it has been put into operation, and whether it conflicts with existing preferential treatment such as BOI/EEC.

From a business perspective, the value of this policy to small commercial and industrial and commercial projects is not necessarily reflected in the ‘immediate commitment to how much tax customers can save’, but in the fact that you can upgrade the project from simple electricity bill savings to a comprehensive management issue of ‘energy-saving investment + possible tax optimization’. This will significantly improve your professionalism when communicating with your boss, financial director, and accountant.

1.6 Grid connection and electricity sales: What can be discussed and what cannot be discussed

The grid connection and electricity sales of rooftop photovoltaics in Thailand have long been subject to regulatory frameworks such as ERC, MEA, and PEA. A summary of ERC rules and official forms compiled by Asia Pacific Energy Portal shows that if you want to sell electricity and conduct system interconnection, applicants need to submit an application for electricity sales and system interconnection to the corresponding MEA or PEA in their location, and meet access and security requirements.

The training must clearly distinguish between 'grid-connected systems' and 'must sell a large amount of electricity to make money'. Grid-connected means that the system establishes a legal connection with the public power grid and meets safety, metering and procedure requirements; it does not mean that customers will definitely gain great benefits from external power transmission. For household and small commercial projects, the core value is still self-use.

The correct words of new employees to customers should be: Grid connection is an important part of the project's compliance operation, and it is also the prerequisite for some policy qualifications and delivery arrangements; but whether there is any delivery revenue, the amount of revenue, and the procedures must be confirmed based on the project location, current rules, and actual approval standards. It cannot be summarized with a general statement "you can sell electricity."

Chapter 2: Household Technical Specifications, Structural Boundaries, Key Parameters and Failure Modes

2.1 What does a household photovoltaic system consist of and what is each component responsible for?

One of the most common mistakes newcomers make is to understand "photovoltaic system" as two things: modules + inverters. A true grid-connected household system includes at least: components, bracket systems, DC cables and connectors, convergence/isolation and protection, inverters, AC distribution and protection, grounding and equipotentiality, monitoring systems, signs, and structural and waterproof nodes connected to the building. If any link goes wrong, the system may experience problems within a few years.

It must be clear: household projects do not win simply by buying the right components. Components determine the bottom line of power generation and durability, inverters determine conversion, grid connection, and monitoring experience, brackets and connections determine mechanical stability, DC side and grounding determine safety, and building connection nodes determine leakage and maintenance risks. Only when the system is viewed as a complete system, rather than a bunch of equipment, can the team truly make a good project.

From a standards perspective, the common first-level standards for components areIEC 61215, which is aimed at the design identification and type testing required for long-term outdoor operation; the second layer isIEC 61730, which emphasizes electrical and mechanical safety, protection against electric shock, fire, and risk of personal injury. In other words, 61215 is more "design and durability qualifications", and 61730 is more "safety qualifications". Sales and engineering at least need to know that these two standards are not the same thing.

2.2 The 8 most critical technical parameters between modules, inverters and roofs

If it makes no sense for a newcomer to memorize a bunch of models, what should really be memorized are the parameters and the relationship between them. The most critical parameters in household projects include: module power, Voc, Vmp, Isc, temperature coefficient, inverter MPPT voltage range, inverter maximum DC input voltage, and roof orientation/inclination/available area. As long as the relationship between these sets of parameters is not clear, the subsequent arrangement and selection may be biased.

In particular, we need to correct a common misunderstanding: higher power components do not necessarily mean a better system. If the module size becomes larger, the open circuit voltage is higher, the string length is limited, the roof fragmentation becomes more severe, or the MPPT matching of the inverter becomes worse, then ‘higher single module power’ may not necessarily lead to better system results. When judging the pros and cons of a plan, it is necessary to upgrade from "compare single block parameters" to "see system matching."

Inverter parameters depend on at least four things: maximum DC input voltage, MPPT working range, number of strings/current allowed by each MPPT, and grid connection and monitoring capabilities. The problem in many household projects is not that the inverter brand is poor, but that the early string length design and MPPT allocation are wrong, resulting in the efficiency being eaten up in the morning, evening and high temperature periods.

2.3 The most basic and practical algorithm: how to determine the string length, why can’t you just rely on experience?

The place where "empirical errors" are most likely to occur at the household site is the string length design. On the surface, it is just one more piece and one less piece. In fact, it involves low-temperature maximum voltage, high-temperature MPPT lower limit, direction mixing, occlusion effect and maintenance convenience. In many systems, it is not that the equipment is bad, but that the string design is not calculated according to the boundaries from the beginning.

At the entry level, you must master at least one conservative algorithm: first check with the lowest expected ambient temperatureMaximum string voltage,make sureNumber of strings × corrected Voc < Maximum DC input voltage of the inverter; Then use high temperature working conditions to checkWorking voltage,make sureNumber of strings × corrected VmpStill falls within the MPPT workable range. The former prevents over-voltage, and the latter prevents 'failure to start'.

Although Thailand is not an extremely cold area, it cannot ignore the low temperature boundary. More importantly, high temperature is a more common real-life scenario in Thai household systems. High temperature will lower the operating voltage of components and cause power derating. Therefore, new employees should understand that in tropical projects, string length must not only prevent extreme boundary errors, but also try to balance availability and efficiency under high temperatures.

2.4 Roof structure classification and waterproofing nodes: instead of applying a circle of glue, determine the load and leakage path first

The most expensive mistake in a household project is often not a 3% loss in power generation, but leakage and structural problems. "Structure" and "waterproofing" must be understood separately. Structural questions first ask: What material is the roof made of, where is the load-bearing boundary, whether the fixing method is suitable, and where will the long-term wind load and thermal expansion and contraction bring the force? Waterproofing questions then ask: where does the water come from, what path will it take, whether the nodes guide the water away, and whether the sealing is only an auxiliary rather than the only dependence.

Common roofs in the Thai market can be roughly divided into concrete slab roofs, porcelain tile/cement tile pitched roofs, metal roofs and partially added roofs. Different structures mean completely different fixed logics. Don’t create the misconception that ‘all roofs rely on the same hooks and glue’. If the structural adaptation is wrong, subsequent water leakage is often just the result, not the root cause.

Household waterproofing must emphasize ‘structure first, sealing second’. In other words, priority should be given to keeping rainwater away from high-risk nodes through structure and path control, and then sealing should be used as a second layer of insurance. As long as glue is used as the only solution, problems will arise after a few years when the material ages, thermal expansion and contraction, and heavy rain are superimposed.

2.5 Why do materials and test levels need to be improved in seaside, salt spray, and high temperature environments?

Thailand is not a single climate scene. Inland high temperatures, seaside salt spray, high humidity and heavy rains in tourist areas coexist, so "installing the same set of materials everywhere" is not a professional approach. Especially in seaside areas and areas with high humidity and heat, the corrosion resistance of brackets, fasteners, connectors, junction boxes, cable jackets and component frames must be evaluated more carefully.

IEC 61701 specifically describes the salt spray corrosion test sequence for photovoltaic modules, which is used to evaluate the module's resistance to chlorine-containing salt spray environments. For seaside projects, this standard is not a decorative parameter, but an important reference to help you distinguish between 'acceptable for ordinary inland projects' and 'should have higher requirements for seaside projects'.

In addition, PID (Potential-Induced Degradation) is also worthy of attention in high temperature and high humidity environments. The IEC TS 62804 series is a test method for PID tolerance. Front-line personnel are not required to become failure analysis experts, but they must know that when selecting components for Thai projects, in addition to power and price, long-term stability under high temperature, high humidity, salt spray and system voltage stress must also be considered.

2.6 Commissioning, delivery and documentation packages: completion does not mean delivery is complete

Many teams regard it as finished when the components are installed and the inverter lights up, but the idea of ​​​​IEC 62446-1 is very clear: the delivery of grid-connected PV systems also requires documentation, commissioning, inspection and customer handover. The focus here is not to memorize standard numbers, but to master a basic delivery framework.

A qualified delivery document package should at least include: system single-line diagram, equipment list, key nameplate information, debugging and inspection records, insulation/polarity/continuity and other test results, monitoring platform handover, warranty instructions and customer-understandable operating instructions. Without a documented system, future after-sales, grid-connected repairs, and responsibility definition will be very painful.

At the end of Chapter 2, we need to establish a concept: technical ability is not only reflected in being able to dress up, but also reflected in being able to check, record, explain, and hand over. A truly good household project is when the customer looks back three months later and still feels that "this company has a system."

Chapter 3: Small commercial calculations, electricity price structure, demand logic and proposal algorithm

3.1 First distinguish between Schedule 2 and Schedule 3, otherwise all calculations may be wrong.

The first step in a small commercial project is not to talk about component brands, but to determine what type of electricity price structure the customer belongs to. According to the PEA English electricity price manual,Schedule 2Suitable for general business/service users andThe 15-minute average combined demand is less than 30 kWsituation;Schedule 3then applies to15-minute average combined demand ranges from 30 kW to less than 1,000 kW, medium-sized general service users whose average electricity consumption in the last 3 months does not exceed 250,000 kWh/month.

This line of demarcation is very important, because it determines whether you are dealing with customers who are “mainly paying for energy and electricity bills” or customers who have a dual structure of “energy + demand”. The real complexity of many small commercial projects is not in the installation itself, but in the fact that if you don’t even understand whether the customer belongs to Schedule 2 or Schedule 3, it will be easy to distort the savings and payback period later.

Therefore, new employees must make a hard move: after getting the bill, first check the user category, whether there is demand charge (Demand Charge), what is the maximum 15-minute demand, and whether there is a TOU. Don’t rush to arrange the plan, first determine the bill structure.

3.2 Small commercial use not only looks at kWh, but also looks at 15-minute demand and minimum demand charges

The reason why many small commercial proposals fail is not that the system does not generate enough power, but that the demand for electricity is not explained at all during the proposal. For Schedule 3 and above users, the bill is not simply "how much does it cost per kilowatt hour", but includes both demand charge (Demand Charge) and energy charge (Energy Charge). Rooftop photovoltaics can significantly reduce electricity purchases during the day, but the improvement in demand costs is often not as great as many salespeople imagine.

The reason is simple: demand is usually determined by the maximum average load within a certain 15-minute window. If the load peak of the project occurs during early morning start-up, cloudy days, short-term impacts, or just exceeds the instantaneous coverage capacity of photovoltaics, then even if the annual power generation of the system is good, the demand electricity bill may not drop significantly. This needs to be made clear, otherwise sales will over-promise.

More importantly, the PEA manual also statesMinimum demand chargeRules: The TOU rates of Schedule 3, 4, 5, 6, and 7 all have the requirement that "the minimum charge shall not be less than 70% of the maximum demand charge in the past 12 months." In other words, even if a customer's load drops a lot in a certain month, they may not be able to reduce their demand bill to zero. If this point is not made clear, small commercial ROI calculations can easily be overly optimistic.

3.3 The key figures of Schedule 2 / 3, the salesperson must be able to read and speak them

The key figures in PEA's current English manual are suitable for inclusion in training directly. Taking the voltage below 22 kV as an example: the TOU energy fee of Schedule 2 isPeak 5.7982 THB/kWh、Off-Peak 2.6369 THB/kWh, the service fee is33.29 THB/month;The TOU demand fee for Schedule 3 is210 THB/kW, the energy cost isPeak 4.3297 THB/kWh、Off-Peak 2.6369 THB/kWh, the service fee is312.24 THB/month。

This comparison illustrates two things. First, the electricity bill structure for small commercial customers may be more complex than that for residential customers, but it is also more worthy of optimization. Second, Schedule 3 users cannot just look at power savings, but must also look at demand and minimum charging rules. If new employees can explain this set of numbers in a smooth manner, they will already be more professional than many of their peers in the market.

In addition, the PEA manual also states: If the meter is installed on the low-voltage side of the customer's transformer, additional2%of kW and kWh to compensate for transformer losses. Although this kind of detail may not be used in every project, it can help the team form a habit: small commercial bills are not simple, and the structure and exceptions must be understood first when calculating.

3.4 Proposal algorithm for small commercial projects: Instead of reporting the system size first, calculate the saving structure first

The most suitable small business proposal algorithm for new employees is not to decide on 30kW or 50kW at the beginning, but to break down the customer bills first. The first layer identifies the proportion of electricity charges and demand charges; the second layer identifies the overlap between business hours and peak periods; the third layer determines the matching between system power generation and the 15-minute peak; the fourth layer determines the system scale, TOU, and whether energy storage or load management is required.

In practice, it is recommended to make two versions first:Conservative planOnly calculate the savings brought about by stable self-use, and do not write down the demand reduction and delivery income too high;Advanced planDemand improvement and future energy storage value should be properly discussed only when load data support is available. This way the proposal will be more stable and more like a professional consultant rather than a salesman.

The core value of this algorithm is to avoid over-promise. Small commercial customers usually pay more attention to authenticity than household customers because they often have financial personnel, accountants or bosses who do their own accounting. Once you overestimate your ROI, subsequent trust will be difficult to repair.

3.5 When do small commercial projects need to consider energy storage, rather than just adding more components?

One of the most common mistakes that many teams make when working on small commercial projects is that they reflexively want to make the system bigger when they see the customer's high electricity bill. However, if customer peaks occur in the evening, at night, or during short-term shocks, simply adding more components may not necessarily lead to better financial results. What is more worthy of discussion at this time is energy storage, load management or phased construction.

Whether energy storage is valuable depends on three things: first, whether the demand peak occurs during a period that cannot be covered by photovoltaic output; second, whether customers have higher requirements for power supply continuity; third, whether the TOU and business hours structure make it economical to 'shift peaks and fill valleys'. If these three items are not true, adding only energy storage will only make the project more expensive.

Therefore, in small commercial scenarios, energy storage should be regarded as a ‘tool to match specific load problems’ rather than a high-end option. Being able to explain clearly 'why batteries are not recommended now' is as important as being able to explain clearly 'why batteries should be made at this time'.

3.6 The correct way to combine corporate taxation and small business proposals

In small business scenarios, taxation is not the main logic, but it is often an important auxiliary logic that promotes decision-making. The correct approach is not to isolate tax incentives and exaggerate them, but to put them into a complete business proposal: the first layer is electricity bill savings; the second layer is cash flow stabilization; the third layer is potential tax optimization; and the fourth layer is brand and ESG narrative.

For customers who are eligible for tax incentives for enterprise-side energy-saving equipment, they should be clearly informed: This part must be confirmed by a tax consultant based on the equipment list, energy efficiency label, e-Tax Invoice, time of operation and the company's existing tax incentive status. In particular, overlapping tax incentives such as BOI/EEC must be excluded. Your value as a planner is to clearly explain the possibilities and conditions, not to make conclusions on behalf of the tax accountant.

A truly professional small business solution should let customers know which benefits are more certain and which benefits require further verification. As long as this line is maintained, the quality of the proposal will be significantly improved.

Chapter 4: Grid connection approval, information list, delivery documents and project process hard version

4.1 Grid connection is divided into two categories: spontaneous grid connection for self-use, and grid connection for electricity sales/retail projects.

You must first distinguish the project types, otherwise all processes will be mixed. Taking MEA as an example, its official website specifically listsGenerator Paralleling (production for own use, not for sale)As a clear entrance, it provides connection application form, Zero Export Controller form, inverter grid-connected routine test report, engineer certificate and grid-connected wiring form documents. This shows one thing: even if it is a grid-connected system that does not sell electricity and is only used for its own use, it must go through a formal connection and documentation process, rather than just "install it and connect it directly."

PEA's PPIM project page shows another type of logic, that is, when participating in a specific rooftop project under the policy window and involving electricity sales arrangements, it needs to be executed according to project announcement, quota, application, review, payment, contracting, grid connection and COD nodes. In other words, grid connection is not a single action, but has different process levels depending on whether the project sells electricity, whether it participates in a specific project plan, and the local power agency.

The most important thing here is not to memorize which system entrance of which unit, but to know:Grid connection = a main line composed of project design, equipment, data, testing, contract, measurement and on-site inspection. As long as grid connection is understood as "final procedures," there is a high probability that mines will be laid in the previous planning and construction stages.

4.2 What does the MEA grid connection information package tell us?

MEA's "Made for Your Own Use Not for Sale" link download page is a good example in itself. Because it does not put only one application form, but also puts: connection application form, connection form document, engineer design/supervision certificate, routine test report for the inverter to be connected to the MEA power grid, Zero Export Controller form and filling instructions, and upload instructions when ready. This shows that grid connection essentially includes three types of data:Project identity information、Technical design information、Equipment and test data。

These three types of data have different functions. The project identity information is used to confirm who you are, which CA number or power point you are connected to; the technical design information is used to explain how you plan to connect, what kind of connection, and who is responsible for the design and supervision; the equipment and test data answer the questions that the power agency is most concerned about: whether your inverter and control equipment have the ability to safely connect to the grid, whether it will cause the risk of reverse power transmission or islanding operation, and whether the system is ready according to the rules.

This logic must be understood clearly, because many frontline personnel will feel that the information is just an administrative requirement. Not really. Documentation is the language that takes a project from 'equipment installed by the engineering team' to 'a grid-connected system acceptable to the utility'. If you don’t speak this language, it’s easy to get stuck on a project no matter how good it is.

4.3 In the PEA PPIM project process, which nodes are most worthy of inclusion in training

PEA's PPIM page gives a sample process that is ideal for training. Taking the residential electricity sales project as an example, the page clearly states: After the project application, PEA will review the documents and technical capabilities; announce the results in the system; those who pass the project must pay the grid connection fee, submit originals and supplementary documents within the specified time; and then sign the contract; and are required to complete the system, apply for grid connection, first synchronization and commercial operation within the agreed SCOD.

The page also gives specific time points when training is of high value:Announcement of review results within 45 days、Pay the fee and submit original documents within 30 days、Complete COD within 270 days of contract signing. These numbers may not necessarily apply to all project types, but they remind the team of one thing: grid connection is never about waiting indefinitely, it is a process with clear time limits and risks of failure.

In addition, the PEA project page also lists key actions such as First Synchronization, COD, and exemption permit notices, which shows that the construction team, project manager, and customer all need to cooperate in advance. If these nodes are not explained clearly in the early stage, the front line will mistake "waiting for the power company" as a black box and ignore a lot of work that can actually be prepared in advance.

4.4 Why you must understand these words Zero Export, Anti-Islanding, and Routine Test Report

The most easily overlooked category of words in front-line training is "control and protection vocabulary." Such as Zero Export, Anti-Islanding, Routine Test Report. Many teams will say, "Our inverter supports it," but if they don't even understand the meaning of the power grid behind these words, it will be difficult to truly stand firm in terms of approval, customer explanation, and fault response.

The business meaning of Zero Export is very intuitive: the system is required not to send excess power back to the public grid, so a controller or inverter strategy is required to limit the output within the range that the local load can absorb. The significance of Anti-Islanding is to prevent islanding operation, that is, when the public grid loses power, the grid-connected inverter cannot continue to maintain the power supply of the external isolated small grid to avoid risks to line maintenance and personnel safety. IEC 62116 is one of the important standards related to inverter anti-islanding testing.

Appears on the MEA download pageRoutine Test Report for Inverter Connected to MEA Grid, indicating that power agencies are not only concerned about the brand, but whether the inverter meets the grid connection behavior, protection action and testing requirements. This means: Don’t understand equipment compliance as “a certain brand is famous”, but as “equipment + test + file + access form” to jointly meet the requirements.

4.5 从签约到 COD：项目经理最实用的倒排法

Newcomers are most afraid that the project process will seem too long and they will not be able to remember it in the end. The most practical way is not to memorize the flow chart, but to learn to reverse it.先看客户希望什么时候用上系统，再看是否涉及售电项目或零回送要求，再倒推申请、勘测、设计、签约、设备采购、施工、资料归档、并网检查、首次并联、COD。 As long as you can work backwards, the collaboration between the project manager and sales will be much clearer.

For project managers, the most common risk is not a single construction delay, but a lack of synchronization of materials, equipment, contracts and site preparation. For example, the data is prepared late, which results in the installation not being able to be connected to the grid; or the construction site and the application single-line diagram are inconsistent, resulting in the need to make corrections; or the customer authorization document is inconsistent with the meter user, resulting in the process being stuck. The greatest value of the inversion method is to expose such cross-departmental problems in advance.

Therefore, project managers should at least have a standard inversion list, rather than relying on WeChat groups to push progress. Mature project management does not always focus on what to do today, but knows "if you don't do it today, which grid-connected node will have problems later."

4.6 Delivery Document Checklist: Why After Sales, Tax and Capital all rely on it

The delivery document list is not only for grid connection, but also for subsequent after-sales, tax incentives, liability boundaries and capitalization preparations. Especially in the context that you may do EaaS/EMC or connect with capital/banks in the future, the quality of documents will directly determine whether the project is readable, credible, and auditable.

It is recommended to divide the files into four packages:Customer contract package、Design and Construction Package、Grid connection and test package、Operation and maintenance and after-sales package. The contract includes contracts, authorizations, payments and invoices; the design and construction package includes drawings, photos, materials, and equipment serial numbers; the grid-connected test package includes application forms, access forms, test records, and power agency contacts; the operation and maintenance after-sales package includes monitoring accounts, instructions, warranty responsibilities, and return visit records.

A bottom line must be made clear: without documentation, there is no closed loop. Without a closed loop, there is no real completion.

Chapter 5: Hardcore version of marketing, lead screening, proposal structure and transaction algorithm

5.1 From traffic to signing, draw your funnel first, otherwise the team will just quarrel

In household and small commercial businesses, the most common problem is not that there are no leads, but that there is no funnel logic in lead processing. The marketing department feels that they have brought in a lot of inquiries, the sales department feels that all of them are invalid traffic, the engineering department feels that the promises made in the past are random, and the finance department feels that the payment collection is uncontrollable. To solve this problem, the first step is not to blame each other, but to establish a unified funnel.

A most basic funnel should have at least seven nodes: lead entry, first-round screening, getting bills/documents, survey appointment, formal proposal, contract signing, and completion delivery. As long as the team doesn't have each step clearly defined, there's no way to discuss conversion rates or know where the problem is.

To be clear: not all inquiries are called ‘client’, not all surveys are worth doing, and not all quotes should be issued. The essence of the funnel is to prioritize limited manpower on projects that are more likely to be successful and worth doing.

5.2 Simplified version of BANT for household use, BANT + SPIN for small commercial use

BANT is the abbreviation of Budget, Authority, Need, and Timeline. It is essentially a set of early screening frameworks, suitable for helping sales determine whether an opportunity is worth investing time. Public sales training materials like Salesforce also explicitly use it as a tool to quickly prioritize leads. For the photovoltaic business, BANT is very suitable for the first layer of filtering.

But your current business is not purely FMCG, and it doesn’t end after just asking four questions. Especially in small commercial scenarios, projects often involve bosses, accountants, store managers, construction windows, cash flow arrangements and tax boundaries, so BANT alone is not enough. A more appropriate approach would be:Users first use the simplified version of BANT for screening, and small business users use SPIN to do in-depth questions after passing BANT.。

The significance of SPIN is to ask customers' questions deeply: Situation understands the current situation, Problem finds pain points, Implication amplifies the impact, and Need-payoff allows customers to tell themselves why it is worth solving. Neil Rackham's research is originally focused on high-value sales, so it is more suitable for small commercial and complex household projects than 'lowering prices from the beginning'.

5.3 Lead scorecard: What kind of inquiries deserve priority?

If you just say 'prioritize high-quality customers', many people don't know how to judge. The most practical method is to give a simple scorecard. Household projects can be scored from five aspects: whether the bills of the past 12 months are available, whether the daytime load is clear, whether the property ownership and installation address are stable, whether the customer is clear about the budget and style, and whether the decision-maker is directly involved. Each item is worth 0-2 points on a 10-point scale. Priority survey is recommended only if the score is 7 or above.

For small commercial projects, you should look at: electricity bill size, overlap between business hours and daytime, boss/decision-making chain clarity, payment habits/financial cooperation, and whether it is suitable for case studies or long-term services. As long as the lead scoring mechanism is established, the team will not spend equal efforts on the worst opportunities and the best opportunities.

The value of the scorecard is not to replace judgment, but to make judgment explicit. Newcomers use it to prevent random followers, supervisors use it to unify standards, and management use it to look back and see why a certain type of customer has higher conversion rates.

5.4 What a decent proposal should look like, not a heap of parameters

Many sales proposals fail not because the plan is bad, but because the proposal structure is poor. When customers open the file and see a bunch of component power, brand logos and total prices, it is difficult to understand why they should choose you. A truly good proposal should allow the customer to understand in order: what is my current problem, why is this system suitable for me, how is it installed, what can it bring to me, what are the boundaries and risks, and why this company is worthy of trust.

For household proposals, it is recommended to fix the structure to 7 sections: customer status, bill and load summary, roof conditions, alternative solutions, benefit calculation, delivery and after-sales, risk and boundary description. For small commercial proposals, the electricity price structure, schedule category, demand logic, optional tax description and construction impact control on business should be added.

The more structured a proposal is, the easier it is for teams to replicate and the easier it is to train new people. It’s not that parameters cannot be written, but they must be placed after the customer has understood the ‘why’.

5.5 What is effective speech and what is high-risk speech?

The most important thing in sales training is not to teach more beautiful words, but to eliminate high-risk words. The characteristics of effective rhetoric are: having a factual basis, having boundaries, and being able to translate complex content into words that customers can understand; the characteristics of high-risk rhetoric are: being absolute, making advance promises, belittling peers, and using unverified policies as deal incentives.

For example, "This set of equipment will definitely pay for itself within 4 years", "Enterprises will be automatically 150% tax deductible after installing it", "It will definitely work even if there is a power outage", "It will be connected to the grid quickly and there will be no problem", these are all high-risk words. On the contrary, "Based on your current bill structure, spontaneous self-use during the day is established, and the static payback period is roughly within a certain range; the specifics will depend on the installation conditions, grid connection progress and actual changes in electricity consumption." This expression is more like a professional company.

New employee training must let them know: customers will believe you not because you speak the most absolutely, but because you speak the most like a person who truly understands business, boundaries, and responsibilities.

5.6 Conversion rate is not luck, but the quality of each previous step

The most common question asked by management is ‘why there have been fewer signings recently’, but what we should really ask is: which funnel link has the most drops, why, and whether it is a matter of lead quality or frontline action. Conversion rate is a result of quality of action, not luck.

For example, if the conversion from leads to surveys is low, the problem may be poor lead quality or the first round of screening is too weak; if the conversion from surveys to proposals is low, the problem may be incomplete survey data or the efficiency of proposal generation is low; if the conversion from proposals to contracts is low, there may be problems with speaking skills, price structures, boundary explanations, or customer screening. Only by taking the conversion rate apart can we have a direction for improvement.

Therefore, what Chapter 5 really wants to solve is not just how to talk to customers, but knowing at what point in the funnel you are creating or destroying deals.

Chapter Six: Subject Compliance, Contract Boundaries, Labor Obligations and Insurance Traces Hardcore Edition

6.1 The first step in subject compliance: first clarify who signs the contract, who issues the invoice, who collects the payment, and who does the construction

One of the most dangerous habits in cross-border operations is that for the sake of convenience, the front-end uses entity A to quote, entity B to sign, entity C to collect, and team D to perform construction. In the end, the chain of responsibility is not even clear internally. First, we must establish a basic awareness of compliance:Every action of the project subject must be clearly mapped. At least four questions must be answered: who is the counterparty to the contract, who issues the tax invoice, who collects the payment, and who is responsible for the construction and after-sales service.

If these issues are not explained clearly at the beginning, not only will there be problems with taxes and repayments later, but they will also be exposed immediately once customers complain, once insurance claims are settled, and once capital is fully adjusted. Especially if you consider bank cooperation or EaaS/EMC in the future, subject confusion will directly reduce credibility. The most important thing in this chapter is not to remember legal terms, but to establish a sense of "subject consistency".

Therefore, the company should stipulate internally that without confirmation from management and finance/legal affairs, the contracting entity, invoicing entity or collection account shall not be changed at will; the project file must be able to see at a glance which entity, which contract and which project each money corresponds to.

6.2 Foreigners operate the border: why “can it be done” is asked before “can it be pretended”?

Thailand’s Foreign Business Act (FBA) is the underlying boundary that foreign investors must know when operating in Thailand. Regardless of whether you use it to apply for a license directly, you need to know what it does logically: it puts some businesses on the restricted list and requires foreigners/foreign-invested controlled entities to obtain a license or certificate under specific circumstances before they can operate. In other words, whether the business can be done is not only a market issue, but also a business qualification issue.

In the official translation, the FBA defines "Foreigner" as not only non-Thai natural persons, but also legal persons registered in Thailand but controlled by foreign capital; at the same time, there is an approval and certification mechanism for List 2 and List 3 businesses, and it is clear that the Department of Business Development (DBD) serves as one of the secretaries and executive agencies. For a business like yours, the most important thing in training is not to memorize a list item by item, but to know:Before entering new business, expanding service scope, or introducing new entities, you must first make FBA / BOI / other exemption path judgments.。

For management, the greatest value of this section is correction. Not all arrangements that “everyone else in the market does this” are suitable for copying, especially in equity holdings, borrowed license operations, affiliated construction and cross-subject collections. Short-term convenience is likely to be exchanged for long-term risks.

6.3 In the terms of the contract, which areas must not be written falsely?

Photovoltaic project contracts are most afraid of two mistakes: one is to write too little, causing all the subsequent explanations to be explained by chat records; the other is to deliberately overwrite in order to close the deal, laying the groundwork for future disputes. A truly mature contract is not about writing the longest contract, but about writing clearly in advance the areas that are most likely to be disputed.

For household projects, it is necessary to at least clarify: system scope, roof boundaries, original leakage or aging responsibilities, construction time windows, customer cooperation matters, monitoring and activation, grid connection and approval responsibilities, power outage behavior boundaries, warranty scope and payment nodes. For small commercial projects, it is also necessary to clarify the business impact, power outage/switching arrangements, change processes, whether third-party construction is involved, and the logic of delaying the construction period if the customer delays cooperation.

It needs to be clear: the contract is not for legal counsel to look at, it is also a protective tool for sales and project managers. Anything that is not explained clearly before signing the contract will most likely amplify into disputes during the after-sales stage.

6.4 Labor obligations: Working hours, holidays, and overtime are not decided by the on-site supervisor.

Field team management cannot rely solely on “industry practice.” Thailand's Labor Protection Act is the underlying law for labor protection. The English version of the French text included in FAOLEX can be used as a basis for understanding. Focusing on the core bottom line of working hours, public legal interpretations generally point out that general work shall not exceed8 hours, no more than48 hours; For hazardous work, it is usually tightened to daily7 hours,weekly42 hours. In addition, employers are usually required to arrange for no less than13 daysholidays (including Labor Day).

Why is this important to PV companies? Because construction and delivery are often rushed into a state of rush, it is easiest for team leaders to verbally arrange long-term overtime to support progress. But without systems, consent procedures, wages and records to back it up, this is not only a management issue but can also become a labor dispute. Especially when cross-city projects, busy seasons, and outsourcing teams are mixed, you must have a bottom line awareness.

Everyone is not required to remember the legal clause numbers, but at least they must know: working hours, holidays, overtime and hazardous operations cannot be arranged however the project manager wants. All systems should go back to written company policies, employment contracts, and local regulatory requirements.

6.5 Social Security and Work Injury Fund: This is a legal obligation, not a welfare option

For employers, social insurance and work-related injury protection are not provided only if the company is better, but the bottom line of compliance. The SSO (Social Security Office) provides employers with online employer services, employer registration, insured person registration and payment declaration portals. This itself shows that formal employment must enter institutional management.

Judging from public professional interpretations, Thailand’s social security contribution rates have maintained their respective differences between employers and employees for a long time.5%structure; after the salary cap base is raised starting in 2026, the maximum monthly payment will be increased from 750 THB to approximately875 THB/square. Since the crawling of the SSO official English page is unstable, this value should be marked as 'Based on the summary of public professional interpretations in 2026, and the latest SSO announcement and actual salary base should still be used for implementation.'

What’s more likely to be overlooked than Social Security is the Workmen’s Compensation Fund. SSO's Work Injury Fund page clearly states that the fund is used to cover employees' injuries, illnesses, disabilities, death or disappearances caused by work; and during the actual medical treatment process, the employer needs to submit a designated form, cooperate with the medical process and accident information. In other words, once a work-related injury occurs on a project, the employer cannot just rely on verbal comfort, but must deal with it according to the system.

6.6 Insurance, photos, signatures, work orders: why these are not formalities

Many companies don't realize how fatal "not taking pictures, not signing, and not keeping files" until an accident occurs or a customer makes a claim. The relationship between insurance and evidence retention is very direct: without clear survey photos, construction node photos, acceptance signatures, equipment serial numbers and work order records, claims settlement and liability definition may become very passive.

Therefore, management should view photos, signatures, and work orders as part of risk management rather than as administrative actions. Project survey photos protect what you said before signing the contract, construction photos protect what you did on site, acceptance signatures protect what you handed over during delivery, and work order records protect what you handled during the after-sales phase.

Chapter 7: Hardcore version of quotation, gross profit, cash flow, exchange rate and inventory model

7.1 Let’s first explain the basics of taxation: VAT, CIT, and service fee accrual.

The English page of the Revenue Department provides a basic foundation that is very suitable for training. First, the general rate of VAT in Thailand is currently7%; Second, any person who continues to sell goods or provide services in Thailand and whose annual turnover exceeds1.8 million THBentities should generally be included in the VAT system; third, the general corporate income tax (CIT) tax rate is20%net profit. That said, quote and profit discussions go beyond just looking at the ‘total price’ and also understand how taxes and bills impact cash flow.

The same set of RD materials also gives common withholding tax standards: for example, payments to Thai companies or foreign companies with permanent establishments in ThailandService and professional service fees, the common withholding tax rate is3%; Payment to a foreign company without a permanent establishment in Thailand is usually5%. This makes sense for your settlement design with Chinese suppliers, overseas technical services, or local subcontracting.

Business teams need to know: Tax isn’t just for accountants. VAT affects customer bills and repayment experience, CIT affects profit caliber, and withholding tax affects service fee settlement and contract net amount. Without talking about taxes, the quotation can easily appear high or low, but the team themselves don’t know why.

7.2 Quotation is not a pat on the head: How should the standard quotation structure be broken down?

The most effective way to train business and finance is not to tell everyone ‘how much gross profit is required’, but to first break down the quotation structure. A standard photovoltaic project quotation should at least be broken down into: main equipment materials, auxiliary materials, labor, survey and design, logistics and hoisting, grid connection and data, after-sales reserves, marketing allocation, exchange rate buffer and target gross profit. Only after taking it apart did the team know what they were selling.

The front-line quotations for many projects seemed reasonable, but later it was discovered that the manpower for grid connection information, after-sales visits, image archiving, customer training, and even monitoring and commissioning were not included at all. The result is not that customers take advantage, but that the company itself forgets about the costs it must bear.

Therefore, quotation templates must be standardized. It is not for administrative beauty, but to prevent the same company from quoting two completely different sets of cost logic for similar projects.

7.3 Gross profit is not equal to real profit: we must think in terms of profit waterfall chart

The most common misunderstanding in business is to regard the contract gross profit as the final profit. In fact, what you get at the moment of signing the contract is only the "quotation gross profit", and there are still a lot of variables that may erode the project income from the real profit. The correct training method is to use a profit waterfall chart.

The basic logic of the profit waterfall is: starting from the contract revenue, first subtract direct materials and direct labor to get the project gross profit; then subtract survey and design, grid connection data, transportation, and installation management to get the contribution gross profit; then subtract rework, after-sales reserves, exchange rate losses, bad debt provisions, and marketing apportionment to get close to the real operating profit. As long as the team does not have this awareness, it will continue to overestimate its ability to make money.

Management should require project reviews to look at at least three levels of profit: quoted gross profit, completion gross profit, and true profit after 90 days. Only in this way can we see whether the problem lies in quotation, delivery or after-sales.

7.4 Payment collection design: why node arrangement is more important than payment techniques

Companies with good cash flow may not necessarily be the most aggressive in collecting payments, but they must design payment collection nodes more scientifically from the beginning of the contract. For household projects, it is recommended to at least bind the repayment to verifiable nodes of the project, such as signing deposit, pre-construction/material arrival, completion of main installation, grid connection/acceptance delivery. For small commercial and complex projects, more emphasis should be placed on synchronization with design, equipment procurement and grid connection nodes.

There are two extremes that are most feared in the payment collection design: one is that the balance is left behind for the purpose of signing the contract, causing the system to generate electricity but the customer has no pressure to pay; the other is that the node setting is out of touch with the actual project, and the customer feels forced to pay and lacks cooperation. A truly mature node design not only protects cash flow, but also conforms to project reality.

Sales must know: every time a node is relaxed, the company is incurring additional financing costs. Project managers also need to know: If the final payment is delayed due to poor documentation or acceptance, it is not a financial problem in nature, but a delivery problem.

7.5 Exchange rate is not a financial abstraction, but a real cost variable for Chinese supply chain companies

Since a large amount of your main materials come from China, the exchange rate is not a problem of the financial department itself, but a profit variable determined by quotation, procurement and payment collection. BOT's foreign exchange page publishes the average buying and selling exchange rate of commercial banks and the weighted inter-bank exchange rate every day, which shows that companies can establish their own exchange rate observation habits instead of passively accepting the results when purchasing and paying.

For example, on April 30, 2026, the BOT page shows that the weighted interbank exchange rate is approximately32.769 THB/USD. This number by itself won’t tell you whether the project is making money, but it reminds you: there must be buffering logic for cross-currency purchases. If the quotation is locked in THB and the purchase is settled in RMB/USD, the quotation validity period, advance payment time and price locking rhythm will all affect the final gross profit.

The most important thing in the training is not to let the business learn hedging, but to let the business know that the quotation validity period, deposit ratio, purchase price lock and exchange rate buffer are not deliberately conservative in finance, but to protect project profits.

7.6 Inventory and spare parts: Why ‘stocking too much’ and ‘having nothing at all’ are both dangerous

Inventory management is most afraid of two extremes: Either for fear of shortage, a large amount of money is invested in slow-moving parts; or in order to reduce inventory, on-site and after-sales are frequently interrupted due to missing parts. Especially when there are many household projects and scattered small businesses, what is really needed is tiered inventory: standard auxiliary materials are always in stock, key spare parts are in limited stock, and main equipment is locked by project.

Procurement and warehouses must know: more inventory is not safer, but the clearer it is, the safer it is. You must at least know which are Class A high-frequency standard parts, which are Class B parts purchased on a project basis, and which are Class C after-sales key spare parts. This layering will be even more important for future EaaS/EMC as downtime losses will be more sensitive.

Without stratification, companies will fall into a very common vicious cycle: they usually feel like they have a lot of inventory, but when something goes wrong, they are always short of key items.

7.7 Financial KPIs that management must look at, otherwise profits will only remain in their feelings.

Financial KPIs should be more than just ‘signings this month’. For a business structure like yours, it makes more sense to look at profit, cash flow, and quality all at the same time. At least it is recommended to look at: quoted gross profit margin, completed gross profit margin, 90-day real profit margin, weighted collection days, balance overdue rate, exchange rate loss rate, inventory turnover days and after-sales reserve utilization rate.

As long as these items are looked at at the same time, management can quickly determine whether the problem lies in front-end quotation, procurement execution, on-site delivery or after-sales tail. A truly good financial chapter does not make finance more difficult, but allows business and engineering to learn how to keep money.

Chapter 8: Monitoring, Alarming, Operation and Maintenance, Cleaning and SLA Hardcore Version

8.1 Monitoring is not about how much power is generated, but about whether the system deviates from expectations.

Many teams regard the monitoring platform as a “power generation digital display board” for customers, but the idea of ​​​​IEC 61724 is closer to ‘performance monitoring and analysis’. It emphasizes not only collecting data, but also judging whether the system performs as expected through parameters such as irradiation, array output, system output, and temperature. In other words, the purpose of monitoring is not to look at a beautiful number every day, but to identify deviations.

For household and small commercial projects, although it is not necessary to deploy large-scale power station-level instruments, the same thinking must be formed: at least it must be able to compare the power generation performance under similar weather conditions today, last week, last month and history; at least it must be able to identify problems such as offline, power generation sudden drop, repeated inverter alarms, single-channel MPPT abnormalities, communication dropouts, etc. If monitoring is only turned on after a customer complains, it is not called monitoring, it is just called after-the-fact review.

Therefore, monitoring should be defined as a ‘tool for detecting deviations’ rather than a ‘page that displays results’. This will directly affect the way the after-sales team looks at data every day.

8.2 What are the minimum types of indicators that should be included in the monitoring dashboard?

对中小型屋顶项目，不需要一开始就复制电站级 SCADA，但监控看板至少应包含五类信息：Availability、Daily/weekly/monthly power generation、Inverter and MPPT status、Alarm record、Communication online status. It would be more valuable if historical comparisons and weather comparisons could be further added.

One of the most overlooked is availability and communication presence. Many project customers think the system is fine when they see numbers on the monitoring page, but in fact the system may have been offline for several days, but the inverter is still running locally; or the communication is online, but a certain MPPT channel is abnormal for a long time and is covered up by the accumulated power generation. The after-sales team must learn to look at both the total quantity and the structure.

一个实用培训方法是：不要只让新人看‘今天发了几度’，而要问他‘为什么和上周同类天气不一样、哪一路变化最大、是不是监控问题还是电气问题’。 By asking these questions, operation and maintenance capabilities begin to truly form.

8.3 How to judge ‘low power generation’, don’t just rely on feeling

The most dangerous habit in operation and maintenance is to say "there seems to be less hair today" based on naked eyes and experience. A better method is to establish a set of simple deviation judgment rules. PNNL's public operation and maintenance best practices mention that if the system output deviates from the expected range of average solar irradiation by about ±10%, troubleshooting should begin; at the same time, dirt is one of the most common O&M problems. In other words, low power generation is not necessarily a fault, it can also be caused by dirt, obstruction, weather deviation or communication problems.

For small and medium-sized roof projects, it is recommended to establish at least three comparison dimensions: comparison with history in the same month, comparison with adjacent sunny days, and comparison with similar projects in the same installation area. If all three show abnormality, then enter on-site or remote diagnosis. This is more economical and more professional than "coming to the door as soon as the customer says less".

We also need to explain the dirty logic clearly. Dirt loss is not always linear, nor is dirtier the easier it is to see from a distance. NREL/NLR's public research emphasizes the concept of soiling ratio, or annual soiling loss, indicating that the impact of soiling needs to be judged through data, not just visual inspection.

8.4 Cleaning is not a cleaning action, but a cost-benefit decision

It is easiest for customers to understand cleaning as "washing when it is dirty", and it is also easy for companies to understand cleaning as "door-to-door service". In fact, whether cleaning is worth doing, how often to do it, and how to do it are all cost-benefit issues. Public information from PNNL points out that the cleaning method and frequency depend on the degree of dirtiness, system size, site environment and labor/equipment costs; strategies may be completely different in urban and low-dust environments and near dirt roads, agricultural areas, and seaside environments.

Therefore, training should not teach newcomers to "clean it every few months", but teach them to judge whether the current site is dirty enough to affect revenue, whether the cleaning cost is lower than the expected additional revenue, and whether customers care more about power generation or appearance. For high-net-worth households, cleaning may also have aesthetic value; for small businesses, it is more about income and stability.

A mature after-sales system should be able to give customers at least three suggestions: no cleaning for now, regular cleaning recommended, and focused inspection and cleaning recommended. In this way, what customers feel is professional judgment, rather than a visit just for the sake of visiting.

8.5 Periodic inspection and IEC 62446: Why operation and maintenance should have annual physical examination thinking

The public summary of IEC 62446-1 applies not only to initial delivery but also to subsequent re-inspections and maintenance. For operation and maintenance, this means that projects should not only be ‘installed and tested once’, but should have a periodic inspection mentality. Perform appropriate revalidation at least annually or as required by the AC system to check that the equipment is still in safe and correct operating condition.

This type of periodic inspection can be a lightweight version for household projects: appearance, fastening, visible cables, inverter alarms, online monitoring, power generation deviations, markings and customer feedback; for small commercial projects, more systematic electrical inspections and document updates should be added appropriately. As long as the team establishes the awareness of ‘annual physical examination’, many faults will be discovered before customers complain.

It needs to be clear: maintenance is not about fixing something that is broken, but about extending the period during which the system remains in a correct state.

8.6 SLA, work orders and customer experience: the real management language of after-sales

After-sales is not managed by empty words such as ‘deal with it as soon as possible’, but by SLA and work orders. The so-called SLA does not necessarily have to be very complicated at the beginning, but at least it must distinguish between response time limit and resolution time limit. It is obvious that the same response criteria should not be used for general consultation, monitoring offline, inverter alarms, shutdown faults and safety risks.

Work orders are the vehicle for organizational learning. An after-sales team without a work order system will only solve similar problems repeatedly but cannot accumulate knowledge. Conversely, as long as each problem can be categorized as 'user misunderstanding, monitoring communication, equipment failure, installation issues, external factors', you will quickly know where the most common problems are coming from and who should be trained next.

Chapter 9: Hardcore version of organizational training, RACI, recurrent training mechanism and talent echelon

9.1 Don’t rush into lectures, first determine the RACI

Once a project is coordinated across sales, engineering, procurement, finance, and after-sales, it will inevitably encounter a problem: who is responsible for doing it, who is responsible for making decisions, who needs to be consulted, and who needs to be synchronized. If this matter is not defined in advance, no matter how much training is done, each other will blame each other during the execution stage. RACI is one of the most practical methods of assigning responsibilities.

PMI's public documents use RACI as a common practice in the Responsibility Assignment Matrix, emphasizing that roles should be clear early in the project. For photovoltaic companies, RACI is most suitable to solve problems such as ‘who initiates the survey, who makes the decision on the plan, who approves the alternative materials, who submits the grid connection data, who keeps track of the final payment, and who closes the after-sales work order’.

The most important thing here is not to memorize the English words Responsible, Accountable, Consulted, and Informed, but to know that each high-frequency task must have only one final decision-maker. As long as there are two Accountables for a task, the organization will slow down; if there is no Accountable for a task, the organization will get out of control.

9.2 The most practical RACI for photovoltaic companies is not the full table, but the high-frequency task table

Many companies create huge management tables as soon as they do RACI, and in the end no one reads it. What is more suitable for you is to make a high-frequency task list first. For example: preliminary screening of clues, survey arrangements, plan review, quotation approval, contract signing, start of construction, approval of alternative materials, grid connection data submission, balance collection, and after-sales work order upgrade. As long as the role of each item is clear, organizational efficiency will be significantly improved.

The greatest value of RACI lies in knowing ‘when to upgrade’ instead of having to do everything yourself. As long as you know who you need to talk to for decisions on what types of issues, the probability of making big mistakes will be significantly reduced.

9.3 Training should not only look at class rates, but should use Kirkpatrick thinking to look at 4 levels of results

The most common misunderstanding in training is that ‘everyone comes to class’ means the training is effective. The reason why the Kirkpatrick model is classic is that it breaks down the training effect into four levels from shallow to deep: response, learning, behavior, and result. In other words, the employee feels that the class is well taught, but it is only Level 1; what really matters is whether he has learned it, whether he can do it when he returns to his job, and whether it has improved organizational results in the end.

For photovoltaic companies, this model is very practical. For example, if a new employee participates in the training on grid connection materials, the first level can measure the degree of satisfaction; the second level can test whether he understands concepts such as CA, single-line diagrams, and Zero Export; the third level can test whether he can really prepare materials independently; and the fourth level can test whether the completion rate of one-time grid connection submission has been improved. Only at the fourth level is training truly relevant to operations.

Therefore, Chapter 9 must correct a common misunderstanding: do not make training an activity, but make training a result improvement project.

9.4 Show-Me four-step method: demonstration, repetition, retelling, and spot check

The core of Show-Me is to break down live actions into four replicable steps: demonstration, repetition, retelling, and spot check. Demonstration solves 'seeing the correct action', repetition solves 'can do it with hands', retelling solves 'clearly explains in mind', and spot check solves 'can continue to do it right after returning to the scene'.

The reason why many trainings fail is not because the content is wrong, but because of the lack of spot checks. Just because new employees did something right at the training site does not mean they will still do it right a week or a month later. As long as there are no spot checks, standard actions will fall back into old habits.

9.5 30/60/90 days for new employees, not a feeling period, but a capability milestone

Many companies say that new employees have a probation period, but there are no competency milestones, so in the end supervisors can only judge whether a person is good or not based on their feelings. A better approach is to split the 30/60/90 days into capability nodes: 30 days to see understanding and basic actions, 60 days to see how to independently complete basic tasks, and 90 days to see whether you can handle and upgrade problems independently within boundaries.

For sales positions, they should be able to complete the initial screening of leads and basic questions within 30 days; they should be able to complete proposal explanations under supervision within 60 days; and they should be able to independently complete a set of standard processes within 90 days. For engineering positions, candidates should be able to understand materials and construction methods within 30 days; be able to complete standard nodes within 60 days; and be able to lead small tasks independently within 90 days. The same goes for customer service and project clerks, there must be a clear path.

As long as there are no 30/60/90 day milestones, so-called ‘training’ can easily degenerate into vague feeling management.

9.6 How do managers know whether training is in vain?

Whether the training is effective should not just rely on the teacher's feeling, but should depend on whether the business indicators change. For example, after the completion of Chapter 2 technical training, has the rework rate decreased? After the completion of Chapter 4, the grid connection training, has the completeness rate of one-time submission of materials improved? After the completion of Chapter 5, the sales training, has it been measured whether the contract signing rate has improved. As long as the training topics and indicators can be linked, training will truly enter the management system.

Therefore, training leaders and department heads should form a fixed action: before each training begins, determine which behavior and which indicator to change; after the training is completed, the results will be viewed in 30 days, 60 days, and 90 days. In this way, organizations will no longer regard training as a cost item that has been done many times but cannot tell the effect.

Chapter 10: Strategic Upgrading, Brand Equity, Project Pool and Capital Readability Hardcore Version

10.1 Strategic upgrade is not about ‘doing bigger projects’, but making projects replicable, auditable and bankable

When many managers talk about strategic upgrades, they naturally think of larger industrial and commercial projects, more cities, and more installed capacity. But from the perspective of financing and long-term operations, what is more important is not ‘bigger’, but ‘more standard, replicable, auditable and bankable’. If more and more projects are done, but the data becomes more and more messy, then the company has not upgraded, but the scale has only increased the risk.

The OECD’s public judgment on Thailand’s clean energy financing and investment roadmap is instructive: Thailand already has an early-launched energy-saving financing mechanism and an active but still-to-expand ESCO market. One of the real bottlenecks is how to convert more projects into standard products that can be financed at scale. In other words, competition in the future is not just about who can pretend, but who can turn projects into assets that financial institutions can understand.

For you, this means that strategic upgrades cannot be divorced from the basics. The household project is responsible for accumulating high-frequency, standardized, replicable data and reputation; the small commercial project is responsible for accumulating more complete cash flow logic and case thickness; and the future EaaS/EMC will be built on the standardization results of the first two.

10.2 Brand equity is not advertising volume, but low customer acquisition cost and high verifiable delivery

For household and small commercial companies, branding is most easily misunderstood as designing logos, advertising, and doing social media. In fact, capital and banks are more concerned about whether there is real business meaning behind the brand. A strong brand at least means: lower customer acquisition costs, customers more willing to pay deposits, higher referral rates, lower project complaint rates, easier payment collection, and more reusable cases.

Therefore, brand equity can be quantified in operations: the proportion of case referrals, survey to contract signing rate, after-sales satisfaction, complaint handling time, content customer acquisition cost, and the number of times high-quality cases are reused. If management only looks at 'exposure', they will continue to invest resources in the weakest parts; if they start looking at these operating indicators, the brand will truly become an asset.

For companies that may engage in capital cooperation in the future, the brand also has a more practical meaning: when you talk about bank installments, third-party funds or asset pool cooperation, the first thing the other party cares about is not how professional you say you are, but whether your customers are willing to trust you, stay, continue to pay, and introduce you to others. Brands are essentially trust that compound.

10.3 Data Governance: Why should the project pool be like an asset ledger rather than a chat record?

The ‘pool’ of project pools is not an abstract word, but rather turns each project into a collection of standardized records.若客户信息、合同、设备序列号、并网状态、回款记录、监控数据和售后记录都分散在聊天软件、个人表格和邮件里，那么这个项目池在资本眼里几乎不可读。

Therefore, one of the key actions in strategic upgrade is data governance. At least the following must be unified: project number, customer entity, installation address, system capacity, key equipment models and serial numbers, monitoring accounts, grid connection status, payment status, warranty start and end, and after-sales work order history. As long as these fields are not unified, it will be painful to do any advanced actions in the future.

This chapter should establish a clear understanding: if you record one more field and upload one more photo today, it is not just for the sake of better management in the back office, but also to lay the groundwork for the company's future project pool.

10.4 What is ‘capital readability’ and what should management prepare for?

Capital readability can be understood as: whether external funding parties can understand your project quality, cash flow structure, risk boundaries and organizational capabilities within a reasonable time. A company with readable capital may not necessarily have successfully raised funds now, but at least it is ready in terms of information and logic.

For a company like yours that mainly uses households and supplements small commercial uses, capital readability usually consists of six parts: 1. Standard contracts and collection logic; 2. Project data ledgers; 3. Stable monitoring and after-sales records; 4. Clear project classification and screening standards; 5. Historical complaints and failure rates; 6. Evidence that can prove the continued operation of the project. As long as these six pieces are not complete, external funds will think that your project pool is too black box.

Therefore, the most correct order for strategic upgrade is not to meet with the financial side first, but to make these preparations first. The success rate is higher when you are ready to talk.

Chapter 11: Hardcore version of EaaS/EMC/ESCO business model

11.1 First distinguish 5 words: installment, leasing, EaaS, EMC, ESCO

If the frontline itself cannot distinguish the pattern, subsequent communication with customers, banks, and capital parties will definitely be chaotic. The most basic distinction is:installmentChanges in payment methods more like equipment sales;leaseMore emphasis is placed on asset use rights and rental arrangements;EaaSMore towards ‘payment by service or result’;EMCIt prefers to 'pay according to energy saving effect or saving sharing';ESCOIt is a service provider that provides comprehensive energy conservation and renewable energy services, financing arrangements, performance guarantees and measurement verification.

The definition of Thai ESCO Association is very suitable for writing into training: ESCO provides a complete set of services related to energy conservation and/or renewable energy, including consulting, project presentation, project management, engineering design, energy consumption analysis, equipment installation and operation, financing arrangements, etc.; its core lies in performance guarantee and clear Measurement & Verification (M&V) process. In other words, ESCO is not a payment method but a service organization with technical, financing and performance responsibilities.

11.2 What is the difference between Guaranteed Savings and Shared Savings?

This is the most confusing concept. According to the definition of the Thai ESCO Association, Guaranteed Savings is closer to 'customers invest their own money, and ESCO guarantees the net income or savings results of the project'; while Shared Savings is closer to 'ESCO or a third party assumes more investment and risk, and then shares the net income with the customer based on the project'. The biggest difference between the two is not the energy-saving technology itself, but who pays, who bears the technical and financial risks, and how the benefits are distributed.

It is very important for you to do EaaS or EMC in the future to clearly explain this difference. This is because many customers say they want “zero down payment”, but in fact they expect Shared Savings or a structure closer to service provider investment; while some customers are not short of money, but just want performance guarantees and more stable project results, then Guaranteed Savings is more suitable for them. If the front line cannot tell the difference, they will give the wrong plan.

Therefore, the first principle of Chapter 11 is not to ‘recommend the coolest model’, but to first determine what kind of risk the customer wants to transfer: investment pressure, technical risk, operation and maintenance trouble, or the risk of less than expected savings. Different risks correspond to different contract structures.

11.3 The correct starting point for EaaS in your current business is not to roll it out in full volume

For your current business structure, the most common mistake in EaaS is to make all projects into a service. In fact, the threshold for EaaS is much higher than that of EPC because it requires you to manage assets, services, repayments, and customer relationships over a longer period of time.

The most reasonable starting point should be: start with some residential and high-quality small commercial projects as pilot projects, and give priority to projects with stable addresses, stable bills, clear daytime loads, high customer cooperation, and good after-sales accessibility. Don’t start with the most complex, cheapest, price comparison-loving customers.

The essence of EaaS is not to reduce the down payment, but to transform a one-time transaction into a long-term service relationship. Therefore, in the pilot stage, the most important thing for the organization is not how many orders to sign, but to run through the chain of contracts, monitoring, payment collection, after-sales and breach of contract handling.

11.4 The core of EMC is not the ‘energy saving story’, but the baseline and M&V

The most difficult thing about EMC is never the equipment, but the baseline. As long as the baseline is not clearly determined, no matter how much subsequent savings are made, there may be quarrels. The definition of Thai ESCO Association places M&V at a very core position, which is very important. Because it means: the contract does not just say "we will help you save electricity", but also clearly states how to measure, how to compare, and which changes are included in the project and which are not.

This is especially critical for small commercial and future industrial and commercial customers. If customer operating hours, tenant mix, capacity utilization, or air conditioning loads change significantly, Shared Savings will simply become a shared dispute if you don't agree on a baseline and change mechanism first. A truly mature EMC project will spend more time on data and baselines in the early stage, but it will save trouble in the later stage.

11.5 What the financial side cares most about is not the story, but defaults, downtime and residual value of assets.

When discussing models with capital, many teams like to talk about a big market, many customers, and good policies. But what the financial side really cares about are three other things: what to do if there is a breach of contract, what to do if the system is down, and whether the assets will still have value after the contract is terminated. As long as these three things are not answered, it will be difficult for EaaS/EMC to move from PPT to real business.

Therefore, the contract must at least consider in advance: the customer's right of disposal when the customer stops paying, the feasibility of system migration or dismantling, the evidentiary power of monitoring data and fault tickets, equipment residual value and depreciation, the transfer of warranty responsibilities, and the handling mechanism when the house is sold/closed/changed in the lease. These things don't sound like sales, but they're the chassis that really make the model work.

11.6 Why you should develop your ESCO language now rather than later

Even if 90% of your current revenue still comes from traditional EPC, organizations should start learning the language of ESCO. Because once you can use 'baseline, M&V, Guaranteed Savings, Shared Savings, risk sharing, and data traces' to understand the project, the actions of sales, engineering, after-sales, and finance will become more systematic.

Looking at the external environment, public discussions on ESCO, low-carbon building financing and energy service models are increasing in Thailand. The low-carbon building project of DEDE and GGGI clearly mentioned that they are promoting the ESCO model and related financing mechanisms to support low-carbon buildings and energy-saving renovations. This means that the future is not just a question of whether you want to do it or not, but that the market and policy environment are gradually requiring more mature service models.

Chapter 12: Appendix, Glossary, Formula Sheet and Hardcore Version of Standard Data Package

12.1 General list of core terms for photovoltaics, electricity prices, taxation, and grid connection

One of the most common distortions is the different ways of saying different parts of the same word. Sales say "recover the cost", finance says "payback period", engineering says "self-use", and customers understand it as "no electricity bill". Therefore, the appendix must provide a unified glossary to avoid caliber drift within the organization.

The most critical terms for your current business should at least include vocabulary related to photovoltaic technology, electricity price structure, grid connection process, tax caliber, financing and EaaS/EMC. The glossary is not meant to appear professional, but to allow newcomers and people across departments to speak the same language.

12.2 Summary of formulas: Let newcomers be able to calculate at least the first version of the answer

It’s not that most newcomers can’t learn, but they don’t have a reusable formula framework in their minds. The greatest value of listing commonly used formulas together is not to allow everyone to calculate to two decimal places, but to give everyone a structured answer instead of patting their heads.

This table only contains the most commonly used one-level formulas, which are suitable for preliminary screening and quick judgment, and do not replace subsequent actuarial models.

12.3 List of four packages of project information, think by folder rather than by person

The most common problem with project data is not that it is completely absent, but that it is scattered. Some people put contracts in chats, some people leave photos on their phones, and some people put single-line diagrams on their computer desktops. Data management that can truly support delivery, taxation, after-sales and financing must be organized according to file package thinking, rather than stored according to personal habits.

It is recommended to standardize into four packages: contract and collection package, design and construction package, grid connection and testing package, operation and maintenance and after-sales package. As long as each project is documented in the same way, the company will save a lot of effort in subsequent training, spot checks, and due diligence.

• Contract and collection package: contract, quotation, authorization letter, payment voucher, invoice/e-Tax Invoice.
• Design and construction package: survey photos, single-line diagrams, layout drawings, materials list, equipment serial numbers, key node images.
• Grid connection and test package: connection application form, access form, engineer certificate, inverter test report, inspection record, grid connection status.
• Operation and maintenance and after-sales package: monitoring accounts, operating instructions, warranty terms, work order records, return visit records, and performance deviation records.

12.4 Principles for using external sources: What can be written directly and what must be written in boundaries

Publicly available sources have been cited extensively throughout this manual, but not all sources are given equal weight. In order to prevent the "media summary" from being described as an "official conclusion" in the future, the source level must be clearly stated in the appendix.

The most stable ones are official regulations, official agency pages, official PDFs and standard entries; the second level is international organizations and semi-official associations; the third level is interpretation by law firms, consulting agencies and media. When actually quoting, the first and second levels should be used first, and the third level is used for supplementary explanations and not for drawing separate conclusions.

Chapter 13: Hard-core version of typical project case collection, using cases to build judgment and calculation capabilities

13.1 Case 1: Why is it not recommended to blindly fill villas for high-net-worth households?

Customer portrait: Self-owned house in the suburbs of Bangkok, 7 air conditioners, there are elderly people and people working from home during the day, the monthly electricity bill has been historically high, and the visible roof surface is obvious. The first demand of customers is not the lowest price, but beauty, stability and after-sales certainty.

Key judgment: This type of customer has higher spontaneous self-use value, but is also most likely to amplify problems after delivery due to aesthetics, leakage and effect expectations. Therefore, the value of the project is not to install it to the maximum, but to install it to the best match.

Calculation logic: First estimate the conservative spontaneous self-use rate based on the stable load during the day, and then calculate the annual savings under different capacity plans. If continued expansion of the system leads to a rapid increase in the proportion of food delivery, we should not continue to expand just because the roof can still fit in it.

13.2 Case 2: Clinic/dental store, why is it a small commercial entry-level model?

Customer portrait: The business hours are stable, the load is concentrated during the day, the boss makes decisions himself, and the requirements for cleanliness of the venue are high. The bill shows obvious energy consumption during the day, so it is suitable for a self-contained roof system.

Key judgment: This type of project is more suitable for early-stage teams to accumulate small commercial capabilities than complex factories, because it combines stable load, better repayment, and case display value.

Calculation logic: First identify its Schedule category, and then estimate power savings based on business hours and TOU structure; if there is a demand fee, handle it conservatively and do not overstate the demand improvement.

13.3 Case 3: Tourist villa/B&B, why the income must be ranged

Customer profile: Living part of the time, renting part of the time for short periods, obvious off-peak and peak seasons, large load fluctuations during the day. Customers often have high electricity bills and are willing to pay for good-looking and low-disruption construction.

Key Judgment: This type of project cannot promise a payback period based on a fixed monthly load because occupancy rates, rental patterns and air conditioning usage intensity will all fluctuate.

Calculation logic: Make at least three income ranges: off-season, mid-season, and peak season, so that customers know the upper and lower limits of the system value.

13.4 Case 4: Light factory/warehousing, why a big roof may not be a good deal

Customer portrait: The roof area is large and the bill seems high, but the property rights, lease term, structural life, demand structure and boss's decision-making style are all more complex.

Key judgment: Teams are most likely to be attracted by "large area" and "large total price", but ignore that such projects have higher requirements on structure, demand, electricity price, repayment and contract capabilities.

Calculation logic: In addition to power saving, demand, voltage level, minimum charges, construction impact and payment ability must be taken into consideration.

13.5 Case 5: EaaS pilot, why choose the best customer first?

Customer portrait: stable address, stable billing, clear load, willing to cooperate with information and monitoring, and good payment behavior. The goal is not to pursue short-term contract signings, but to verify the long-term service model.

Key judgment: The value of pilot projects lies in ‘learning to do’, not ‘doing more’. If the most complex customers are selected from the beginning, the team will mix model issues with customer issues and fail to learn real experience.

Calculation logic: In addition to project savings, it also depends on monthly service fees, customer willingness to continue paying, outage response, contract termination and residual value treatment.

Chapter 14: High-frequency Q&A and unified hard-core version

14.1 A customer asked: Is it more cost-effective to install a bigger home?

Standard answer: Not necessarily. How much can be installed on the roof is not the same as how much is best suited for the bill. For household projects, the value of the system first depends on how much it can be used spontaneously during the day, rather than the total installed capacity itself.

How to answer: You can’t just say ‘of course it’s the most cost-effective to have a full floor’ just to cater to customers. This will push the project from a matching solution to a display solution, and it is easy for there to be a revenue gap in the future.

Why: When the system is too large, the spontaneous self-consumption rate decreases and the proportion of delivery is increased. The high-priced daytime electricity purchases that can really offset it may not necessarily increase simultaneously.

14.2 Customer asked: Will it leak after installation?

Standard answer: Any roof construction must handle waterproofing carefully, but the professional approach is not to just apply a circle of glue, but to first determine the roof structure and waterways, and then use appropriate fixing and sealing nodes to reduce risks.

How to answer: You can’t say ‘it will never leak’. It can be said that ‘we will try to reduce the risk to a very low level according to standard construction methods and make the boundaries clear in advance’.

Why: As long as there is a building connection, there is a boundary; the difference between a professional company and an unprofessional company is whether this boundary is truly understood and managed.

14.3 Customer asked: Can it still be used during a power outage?

Standard answer: A standard grid-connected system usually triggers protection to stop output when the public power grid is out of power; if you have clear power backup needs, you need to design energy storage and backup power circuits separately.

How to answer: You can’t vaguely explain it, and you can’t let customers default that ‘having photovoltaics means that there will be no power outage’.

Why: This is one of the most common areas of misunderstanding among customers and one of the most likely to trigger strong complaints.

14.4 Customer asked: Others are cheaper, why are you expensive?

Standard answer: The difference in total price usually comes from equipment, construction methods, safety configuration, data support, grid connection services and after-sales responsibilities. It is recommended to compare the same range, the same brand, the same safety and the same responsibility, rather than just the final number.

How to answer: You can't belittle your peers right away, and you can't immediately cut off key configurations in order to close a deal.

Why: What customers really want is a comparison framework. Once you provide a framework, professionalism will be established.

14.5 A customer asked: Are all photovoltaic installations by enterprises eligible for 150% tax deduction?

Standard answer: It cannot be understood so simply. The enterprise-side tax incentives in 2026 are targeted at investments in qualified high-efficiency machinery, equipment and energy-saving materials; whether they are applicable depends on the equipment category, energy efficiency label, e-Tax Invoice, operation status and whether it conflicts with BOI/EEC and other preferential treatment.

Unable to answer: It cannot be said that ‘if a company installs it, it will automatically receive 150% tax deduction’.

Why: This is the policy point that is most easily distorted by marketing rhetoric, and it is also the content that has been specifically corrected in the first chapter.

14.6 Internal blacklist of high-risk terms

In principle, the following words should not appear directly in sales promises: ‘absolutely’, ‘definitely’, ‘definitely’, ‘guaranteed’, ‘zero risk’, ‘make money when you install it’, ‘it is worth installing without having to look at the bill’, ‘150% tax deductible for enterprises’, ‘can still be used even if there is a power outage’.

The purpose of blacklisting these words is not to stop the team from speaking, but to prevent the organization from being biased by high-risk expressions.

• Definitely get your money back
• Absolutely no water leakage
• It will definitely be connected to the grid very quickly
• Businesses can enjoy 150% tax deduction
• It will definitely work during a power outage
• The bigger you pretend, the more money you make

Chapter 15: Manager Dashboard, Thresholds, Quarterly Actions and Order Rejection Standard Hardcore Edition

15.1 Manager’s monthly dashboard, retaining only the 12 most critical indicators

If there are too many indicators, managers will lose focus; if there are too few indicators, managers will be blind. For a business structure like yours, it is recommended that the monthly dashboard only keep the 12 most critical indicators, covering the five categories of growth, delivery, cash flow, quality and after-sales.

The 12 most recommended indicators are: number of effective leads, survey rate, contract signing rate, quotation gross profit margin, completion gross profit margin, weighted days for payment collection, final payment overdue rate, complete rate of one-time grid connection submission, average number of days from completion to grid connection, rework rate, first after-sales response time, and proportion of referrals. As long as these 12 numbers are continually looked at, managers can quickly identify problem trends.

15.2 Indicators not only look at numbers, but also set red, yellow, and green thresholds

The problem with many management reports is not that there are no numbers, but that there are no thresholds. Without a threshold, all numbers can only be interpreted by feel. It is recommended to set red, yellow, and green intervals for core indicators from the beginning. For example, if the completion rate of grid-connected data submission is lower than a certain value, a management review will be triggered; if the balance overdue rate exceeds a certain value, certain types of customers will be suspended; if the rework rate deteriorates for two consecutive months, the technical team must be retrained.

The threshold may not necessarily be accurate from the beginning, but it will force the organization to move from "seeing the problem" to "taking action on the problem."

15.3 Order rejection criteria: What orders will hurt the company if signed?

A truly mature manager does not sign every order, but knows which orders will hurt the company if signed. The rejection criteria should at least include: the customer only accepts extremely low prices and refuses transparent comparisons, the roof or electrical boundary is high-risk but unwilling to rectify it, the payment terms are seriously unbalanced, the customer requires absolute commitment, the property rights/subjects/information are obviously unclear, and the historical credit or communication quality is obviously abnormal.

Refusing orders is not about being conservative, but about protecting organizational capacity. Especially in the household + small commercial stage, companies are most afraid of investing a lot of resources on low-quality orders. In the end, not only will they not make money, but they will also mess up the brand, team and cash flow.

15.4 How to break down quarterly goals so that they don’t become empty slogans

The worst thing about quarterly goals is that they are ambitious but cannot be implemented. The most practical approach is to retain at most 3 first-level goals each quarter, and divide each first-level goal into 3-5 key actions, with a responsible person and inspection node for each action. As long as this can be done, the execution of the quarterly plan will be significantly improved.

For example, if the quarterly goal is to improve the quality of user transactions, the corresponding actions can be: optimizing lead scorecards, unifying proposal templates, compressing high-risk words, increasing the reuse rate of case content, and establishing a 30-day return visit mechanism. If the goal is to promote EaaS pilots, the corresponding actions are completely different.

15.5 What should the boss read and what not read in the weekly newspaper?

What the boss should read most when reading the weekly report is not "the team is working hard" but trends, anomalies and actions. It is recommended to read three types of content: why the three best projects this week are good, why the three worst projects are bad, and what is the one thing that must be changed next week.

The last thing a weekly newspaper should write about is general descriptions and emotions. The last thing a boss should ask is ‘why it’s not done yet’. More effective questions are: what is the root cause of the problem, who needs support, and how to fix it next week.

15.6 Starting today, 4 actions management must do every month

In order to make this manual truly practical, this chapter ends with a minimum set of actions for management. First, look at the dashboard; second, review the 3 best and 3 worst projects; third, randomly check a batch of key data and work orders; fourth, decide on a systemic problem that must be corrected next month. As long as these 4 actions can be adhered to, the entire manual will not remain on paper.