Solar Quotation Malaysia: How to Compare Solar Installer Packages
Solar Quotation Malaysia: How to Compare Solar Installer Packages
Receiving a solar quotation can feel simple at first. One installer offers a lower price, another offers a larger system, and another may highlight a long warranty. But in Malaysia, comparing solar installer packages should not be based on price alone.
A proper solar quotation should help you understand the proposed system size, expected TNB bill savings, solar panel and inverter brands, warranty terms, Solar ATAP assumptions, payback period and after-sales support.
This guide explains how to compare solar quotations in Malaysia before signing, so you can avoid choosing a package that looks cheap upfront but may not give the best long-term value.
To compare solar quotations in Malaysia, do not only look at the final price. Compare system size, expected generation, TNB savings, Solar ATAP assumptions, solar panel brand, inverter brand, product warranty, inverter warranty, workmanship coverage and after-sales support.
The best solar package is not always the cheapest package. A better package is one that is properly sized for your property, gives realistic ROI, uses reliable equipment and comes with clear support after installation.
Why Solar Quotations Can Be Confusing
Many solar quotations look similar at first glance. They may show system size, number of panels, total price and estimated savings. However, the details behind those numbers can be very different.
One quotation may use a stronger inverter, clearer workmanship warranty and more realistic savings assumptions. Another may show a lower price but exclude important items such as monitoring, on-site service, application work or labour during warranty claims.
Do not sign a solar quotation just because the package price looks attractive. First, check whether the system size, warranty, Solar ATAP assumptions, ROI and installer support are clearly explained.
What You Should Compare in a Solar Quotation
A good solar quotation should not only show “total price”. It should give enough information for you to understand what you are paying for and what kind of long-term support you will receive.
| Quotation Item | Why It Matters | What to Ask |
|---|---|---|
| System Size | Determines how much solar energy the system can generate. | Why is this kWp size recommended for my property? |
| Monthly Generation | Shows estimated electricity production. | How many kWh is expected per month? |
| TNB Savings | Helps estimate actual bill reduction. | How was the savings estimate calculated? |
| Solar Panel Brand | Affects performance, warranty and long-term reliability. | What brand and model are included? |
| Inverter Brand | The inverter is a key electronic component in the system. | What is the inverter warranty and can it be extended? |
| Warranty | Different components have different warranty coverage. | What is covered, for how long, and who handles claims? |
| Workmanship | Installation quality affects safety and long-term performance. | How long is workmanship warranty? |
| After-Sales Support | Important for monitoring, service and warranty issues. | Who supports me after installation? |
1. Compare System Size, Not Just Total Price
One of the most common mistakes is comparing quotation price without checking system size. A RM20,000 quotation and a RM28,000 quotation may not be comparable if one offers a smaller system and the other offers a larger system with better equipment.
System size is usually measured in kWp. A larger system can generate more electricity, but larger is not always better. Under Solar ATAP, the system should be sized according to your monthly TNB bill, roof space, self-consumption and realistic payback period.
Before comparing prices, ask:
- What is the proposed system size in kWp?
- Why is this system size recommended?
- Is this based on my monthly TNB bill?
- Is this suitable for single phase or three phase supply?
- Is the system oversized or right-sized?
2. Compare Estimated Generation and TNB Savings
A solar quotation should explain how much electricity the system is expected to generate each month and how much your TNB bill may reduce. If the quotation only shows a price but does not explain estimated generation, it is difficult to judge value.
Check whether the quotation shows:
- Estimated monthly solar generation
- Estimated yearly solar generation
- Estimated monthly TNB savings
- Estimated yearly savings
- Estimated payback period
- Assumptions used for the savings calculation
Be careful with very aggressive savings claims. A good installer should explain the calculation, not only give a large savings number.
3. Compare Solar ATAP Assumptions
For 2026 solar users in Malaysia, quotation comparison should be based on the Solar ATAP framework. This means the quotation should not rely only on old NEM assumptions or generic statements about selling electricity to the grid.
The installer should explain how the system is expected to perform based on:
- Self-consumption
- Exported solar energy
- Monthly TNB bill
- System size
- Single phase or three phase supply
- Payback period
- Current programme treatment
Practical Example
If two quotations recommend the same system size but one installer clearly explains self-consumption, exported energy and payback under Solar ATAP, that quotation may be easier to evaluate than a cheaper quotation with unclear assumptions.
4. Compare Solar Panel Brand, Model and Warranty
Not all solar panels are the same. Different brands and models may have different efficiency, warranty, degradation rate and support availability in Malaysia.
When comparing solar panel details, ask:
- What solar panel brand is included?
- What panel model is included?
- What is the panel wattage?
- How many panels are included?
- What is the product warranty?
- What is the performance warranty?
- Who handles warranty claims?
A quotation with better panel quality and clearer warranty may have stronger long-term value than a cheaper package with unclear product details.
5. Compare Inverter Brand and Warranty
The inverter is one of the most important components in a solar system. It converts solar power into usable electricity for your home, shop, factory or commercial building.
Because the inverter is an electronic component, it should be checked carefully. A weak inverter warranty can affect future replacement cost.
Ask every installer:
- What inverter brand and model are included?
- How many years is the inverter warranty?
- Can the inverter warranty be extended?
- What happens if the inverter fails?
- Are inspection and labour included during warranty claims?
- Is monitoring included through the inverter system?
6. Compare Workmanship and Installation Scope
Solar installation quality matters. Even good equipment can perform poorly if installation workmanship is weak or if roof mounting is not done properly.
Quotation should clearly explain the installation scope, including:
- Roof mounting method
- Cabling route
- Protection devices
- Monitoring setup
- Testing and commissioning
- Workmanship warranty
- On-site service coverage
- Whether extra roof work is excluded
If your roof is old, leaking, steep or difficult to access, the installer should explain whether additional cost may apply.
7. Compare Residential, Commercial and Factory Solar Packages
Solar quotations should also be compared based on property type. A residential quotation and a factory quotation may have very different technical considerations.
| Property Type | Common Quotation Focus | Extra Things to Check |
|---|---|---|
| Residential Solar | Terrace house, semi-D, bungalow | Roof space, monthly TNB bill, single phase or three phase, warranty and ROI |
| Shop or Office Solar | Commercial roof and daytime usage | Operating hours, account type, roof access and self-consumption |
| Factory Solar | Large roof, high usage and larger system design | Load profile, maximum demand, roof structure, safety planning and project ROI |
8. Compare Payback Period and ROI
Solar ROI is one of the most important parts of quotation comparison. A package that costs more upfront may still be reasonable if it has better equipment, stronger generation, clearer warranty and better long-term support.
When checking ROI, compare:
- Initial installation cost
- Estimated monthly TNB savings
- Estimated yearly savings
- Payback period
- Warranty coverage
- Expected maintenance or replacement risk
- Whether the system is right-sized
Check Solar ROI Before Accepting a Quotation
Before choosing an installer package, use the Solar100 ROI Calculator to estimate whether the quoted amount, expected savings and payback period make sense for your property.
Red Flags in a Solar Quotation
Be careful if a solar quotation or installer package has these warning signs:
- The quotation only shows total price with little detail
- System size is not clearly stated
- Solar panel and inverter brands are not listed
- Warranty terms are unclear
- Workmanship coverage is not explained
- Estimated savings are shown without calculation
- Solar ATAP assumptions are not explained
- The installer promises unrealistic bill reduction
- After-sales support is vague
- You are pressured to sign quickly without proper assessment
Questions to Ask Before Signing a Solar Quotation
Before signing any solar installer package in Malaysia, ask these questions:
- Is this quotation based on my actual TNB bill?
- Why is this system size recommended?
- How much electricity will the system generate monthly?
- How much will be self-consumed?
- How much may be exported?
- How does Solar ATAP affect the calculation?
- What brands and models are included?
- What warranty terms are included?
- Are labour and on-site service included during warranty claims?
- Who handles application and documentation?
- Who supports the system after installation?
What to Prepare for a Solar Quotation Check
If you want Solar100 to help check whether your solar quotation or installer package is reasonable, prepare these details first:
- Your area
- Property type: home, shop, factory or commercial
- Average monthly TNB bill
- Single phase or three phase, if known
- Roof photos, if available
- Quoted system size
- Quoted amount
- Solar panel brand and inverter brand
- Warranty terms offered
- Whether you want to compare installer options
Need Help Comparing a Solar Quotation?
Send Solar100 your area, property type, monthly TNB bill and quotation details. We can help you check whether the package, warranty, system size and ROI look reasonable before you decide.
Final Summary: Compare Solar Packages by Value, Not Just Price
Solar quotation comparison in Malaysia should not be based only on the lowest price. A proper comparison should include system size, expected generation, Solar ATAP assumptions, TNB savings, ROI, equipment brand, warranty, workmanship and after-sales support.
A good installer package should be clearly explained, properly sized for your property and supported by realistic savings calculations. If the quotation is unclear, ask more questions before signing.
Before making a final decision, calculate your ROI, understand NEM vs ATAP, compare warranty terms and choose the installer package that gives the clearest long-term value.
Article Summary
When comparing solar quotations in Malaysia, users should check system size, generation estimate, Solar ATAP assumptions, TNB savings, payback period, solar panel brand, inverter brand, warranty and after-sales support. The cheapest package is not always the best option if ROI, workmanship and long-term support are unclear.
May 06,2026