Is Solar Worth It for a Singapore Landed Home? A 2026 Worked Example
5 min read · updated 30 September 2026
Electricity in Singapore costs 31.16 cents per kWh including GST on SP Group's regulated tariff for Q4 2026. A roof that generates part of that electricity removes it from the bill at the full tariff, and anything not used at home is exported through the dual meter and credited.
The table on this page shows what that looks like for the four common landed property types, using the same model that runs the roof estimator on this site. The assumptions are listed underneath, and every number stays an estimate until the survey.
The saving assumes the household uses most of what the roof generates in the daytime. Homes with someone in during the day, air-conditioning running, a pool pump or an EV on charge reach higher self-consumption and a larger bill cut. Homes that are empty in the day export more of what they make.
Roof orientation, shading from neighbouring buildings and the roof material all move the result. That is why every quotation follows a site survey, and why the calculator gives a range.
| Property type | Typical system | Yearly generationEst. annual generation | Est. year-1 saving |
|---|---|---|---|
| Terrace house12.98 kWp | 12.98 kWp | ~16,573 kWh | ~S$4,908 |
| Semi-detached19.47 kWp | 19.47 kWp | ~24,859 kWh | ~S$7,368 |
| Bungalow28.32 kWp | 28.32 kWp | ~36,159 kWh | ~S$10,704 |
| Good Class Bungalow39.53 kWp | 39.53 kWp | ~50,472 kWh | ~S$14,940 |
Indicative estimates, not a quotation. Assumptions: SP Group tariff 31.16 cents per kWh including GST (Q4 2026); export credit S$0.26 per kWh for electricity sent to the grid; 1,277 kWh per kWp a year delivered; daytime self-consumption 70%. Homes that use more electricity in daylight save more. Actual results depend on roof orientation, shading and consumption.