Sunnify Lens: Solar savings estimate for Singapore landed homes

No. The calculator gives a planning estimate based on satellite data, standard assumptions, and SP Group tariff rates. Final pricing, system design, roof suitability, and installation details require a physical site assessment and a written quotation from a licensed installer.

No. The estimate result is shown in full without any sign-up or contact details. You only need to provide contact details if you choose to request a site survey or share the estimate by WhatsApp or email.

The estimate is a directional figure, not a guarantee. It uses Google Solar API satellite data for your specific address, Singapore peak sun hours (4.33 per day on average), SP Group 2025 Q2 tariff rates, and a 30% system loss factor. Real savings depend on your actual roof area, shading, panel brand, and how much power you use during daylight hours. A site survey by Sunnify gives you verified numbers.

The calculator uses your Singapore address to pull satellite roof data from the Google Solar API. It combines that with Singapore-specific assumptions: 4.33 average peak sun hours per day, SP Group tariff of approximately S$0.297 per kWh, a 30% system loss factor covering inverter inefficiency, wiring, heat, and soiling, and a self-consumption rate of 25% for a typical landed home. Your property type and roof type refine the estimate further.

For most suitable landed homes, yes. A typical system costs S$15,000 to S$25,000 installed and pays back in about 5 to 6 years. After payback, the panels generate effectively free power for another 15 to 20 years. The main factors are your roof area, daytime electricity usage, and shading from nearby trees or buildings. The calculator gives you a first answer for your specific address before you commit to anything.

Yes, to a useful degree. The Google Solar API reads the rooftop geometry, pitch, and orientation from satellite data and estimates usable panel area. It does not detect shading from trees or assess roof condition, so those factors are confirmed during the in-person site survey. The satellite estimate is accurate enough to tell whether solar is worth investigating further.

For a suitable Singapore landed home, the typical payback period is 5 to 6 years on a system that lasts 25 years. Payback depends on system size, installation cost, how much daytime electricity you use, and the SP Group tariff rate. Homes with high daytime usage (air conditioning, EV charging, pool pumps) tend to see shorter payback because they self-consume more of the solar generation at the full retail rate rather than exporting it at the lower wholesale rate.

Nothing, unless you choose to continue. The estimate is yours to keep or ignore. If it looks promising, you can book a free site survey where Sunnify visits your property in person to measure the roof, check shading, assess your electrical setup, and give you verified figures. There is no deposit, no sales pitch, and no obligation on the day.