If you are researching solar panel installation in Malaysia, you may have seen two terms: NEM and ATAP. Many homeowners and business owners are now asking: why did people talk about NEM before, and why is everyone now talking about Solar ATAP?
In simple terms, NEM was the previous solar bill offset mechanism, while Solar ATAP is the new rooftop solar framework starting from 2026. For ordinary users, the main point is not that solar is no longer useful. The real change is that system sizing, daytime self-consumption, export credit and ROI calculation now matter more than before.
NEM refers to Malaysia’s previous Net Energy Metering mechanism. It allowed solar users to export excess solar electricity to the grid and use that value to offset their electricity bill.
Solar ATAP is the new rooftop solar framework from 2026. It places stronger emphasis on self-consumption, meaning your solar electricity should first be used by your home, shop, office or factory. Excess electricity may then be exported to the grid, but unused export credit generally cannot be carried forward to the next billing period.
NEM stands for Net Energy Metering. For many years, this was the main mechanism Malaysian solar users referred to when installing solar panels for homes and businesses.
Under the NEM concept, your solar panel system generates electricity during the day. Your property uses the solar electricity first. If there is excess solar energy that you do not use immediately, it can be exported to the TNB grid and reflected as a bill offset.
For most users, NEM was relatively easy to understand:
However, with the policy transition, NEM is no longer the main framework for new rooftop solar applications from 2026. The new focus is Solar ATAP.
Solar ATAP stands for Solar Accelerated Transition Action Programme. It is Malaysia’s new rooftop solar framework starting from 2026, introduced after the end of the NEM programme.
The core idea of Solar ATAP is straightforward:
This does not mean solar is no longer worth installing. It means solar decisions now require more careful calculation. Instead of asking “how large can I install?”, a better question is: “What system size is suitable for my actual electricity usage?”
If we simplify the difference into one sentence:
NEM was more about exporting excess solar electricity for bill offset, while ATAP is more about using solar electricity correctly, sizing the system properly, and avoiding wasted export credit.
| Comparison | NEM Previous Mechanism | Solar ATAP New Framework |
|---|---|---|
| Policy Role | Previous Net Energy Metering mechanism | New rooftop solar framework starting from 2026 |
| Core Logic | Use solar first, export excess energy and offset the bill | Prioritise self-consumption, then export excess energy under new credit rules |
| Credit Usage | Users focused heavily on export offset value | Users must consider whether export credit can be used within the same billing period |
| Rollover | Many users paid attention to whether credit could be accumulated or carried forward | Unused export credit generally cannot be carried forward |
| Residential Users | Mainly focused on bill savings, system cost and payback | Export credit is treated based on applicable Energy Charge |
| Commercial Users | Mainly focused on electricity load and payback period | Non-domestic export credit is based on Average SMP |
| System Design | Some users tended to maximise system size | Proper right-sizing is more important to avoid wasted credit |
| Main User Focus | Installation cost and monthly savings | Daytime self-consumption, system size, ROI and installer design |
Solar panels generate most of their electricity during the day. If your home or business uses electricity during solar generation hours, such as air-conditioning, pumps, office equipment, refrigeration, machinery or production lines, your solar electricity can be used directly.
This directly consumed solar electricity is usually the most valuable part of your solar generation because it immediately reduces the amount of electricity you buy from the grid.
However, if your property uses very little electricity during the day, much of the solar electricity may be exported. Under ATAP, export credit is treated differently from the old NEM mindset, and unused credit generally cannot simply be carried forward to the next month. This means oversizing a system may lengthen the payback period.
In the ATAP era, the best solar system is not necessarily the largest system. It is the system that best matches your electricity usage pattern. If the system is too small, savings may be limited. If it is too large, some export credit may not be fully utilised.
If you are a residential user, such as a terrace house, semi-D, bungalow or other landed home owner, the most important starting point is your monthly TNB bill and roof condition.
Residential users should check:
If your monthly TNB bill is only around RM100 to RM200, solar may need more careful calculation. If your bill is consistently around RM300, RM500, RM800 or higher, it is more worthwhile to estimate your solar ROI seriously.
For commercial users, the impact of ATAP should be evaluated based on actual electricity usage hours. Many shops, offices, schools, warehouses, cold rooms and factories already consume a lot of electricity during the day, which can make solar attractive.
Commercial and factory users should review:
For businesses and factories, the cheapest solar quotation is not always the best option. System design, estimated generation, actual self-consumption, after-sales service and long-term ROI are often more important.
No. Solar ATAP does not mean solar is no longer worth installing. It simply means solar decisions should be based more carefully on real electricity usage.
Previously, some users might think: if the bill is high, just install a larger system. Under ATAP, a more practical approach is:
If your bill is consistently high and your property uses electricity during the day, solar can still be worth calculating under ATAP. This is especially true for commercial buildings, factories, schools, cold rooms, warehouses and high-usage landed homes.
You can start by asking a few simple questions:
| Question | Why It Matters |
|---|---|
| What is your monthly TNB bill? | The higher your electricity bill, the greater the potential for solar savings. |
| Do you use electricity during the day? | Under ATAP, higher daytime self-consumption usually improves ROI. |
| Is your roof large enough? | Roof space affects the possible solar system size. |
| Is your roof shaded? | Shading reduces solar generation. |
| Will you use or own the property long term? | Solar is a long-term investment, so ownership period matters. |
| Can the installer explain ATAP clearly? | A good installer should explain self-consumption, export, system sizing and ROI, not only price. |
Under the new ATAP framework, users should not only ask “how much does solar cost?” You should ask more specific questions to ensure the system design matches your actual usage.
These questions help you avoid overselling and allow you to compare installer proposals more realistically.
You can start with the Solar100 ROI Calculator, or WhatsApp us with your area, property type and monthly TNB bill. We can help you do a basic suitability check before you compare solar installer options.
The biggest difference between NEM and ATAP is not that solar has stopped being useful. The difference is that users now need to calculate solar returns in a more practical way.
Under ATAP, the most important points are:
If your monthly TNB bill is consistently high, your roof is suitable and the system is designed properly, solar can still be worth serious consideration under Solar ATAP. The key is not only asking “how much does solar cost?” but asking “is this solar system suitable for my electricity usage pattern?”
NEM was Malaysia’s previous solar bill offset mechanism, while ATAP is the new rooftop solar framework starting from 2026. ATAP places stronger emphasis on self-consumption, same-month credit utilisation, proper system sizing and realistic ROI. Before installing solar, homeowners and businesses should review monthly TNB bill, daytime usage, roof condition and installer design.
Philippines