Rooftop solar for Malaysian homes typically offsets 30 to 60% of the TNB bill, depending on system size, roof and usage; the calculator on this page shows an indicative payback for your bill with every assumption visible. Infinergi designs and installs residential systems under Solar ATAP, handles SEDA and TNB paperwork, and installs in 1 to 2 days.
Home solar savings calculator
See and adjust the assumptions
Indicative only, not a quote. The calculator converts your bill to kWh at the average rate, sizes a system (4 to 15 kWp) to cover the target share, and values solar kWh at a discount because exported energy and some bill components are not offset at the full rate. Ignores panel degradation (about 0.5% a year), maintenance and financing, and assumes an unshaded roof. Your quote is based on a site assessment and Solar ATAP rules at the time.
Get an accurate quote →How home solar saves you money
Panels on your roof generate electricity during the day. What your home uses directly reduces what you buy from TNB, and surplus exported to the grid is credited under the Solar ATAP programme, which replaced net metering. Because exported energy and some bill components are not offset at your full average rate, we value solar conservatively in the calculator.
| Typical system size | Typical bill offset | Payback | Installation |
|---|---|---|---|
| 5 to 15 kWp, depending on roof space and usage | 30 to 60% | Depends on system cost and how much power you use in daytime; see the calculator | 1 to 2 days |
Typical ranges from residential systems we have quoted and installed. They depend on roof space and orientation, shading, your usage pattern and programme rules.
What happens when you go solar with us
- Free quote from your TNB bill and roof photos or a site visit.
- Design: panel layout, inverter selection and expected generation.
- Applications: we handle SEDA, Solar ATAP and TNB paperwork.
- Installation by a certified crew, usually in 1 to 2 days.
- Commissioning and monitoring: see your generation on your phone from day one.
- After-sales: warranty support and maintenance when you need it.
Warranties and support
- Panels: typically a 25-year performance warranty from the manufacturer
- Inverter and workmanship: warranty terms are set out in your quote
- Support: contact us by WhatsApp or phone; our offices are in Sungai Petani, Kedah and Kulai, Johor