For homes & businesses
See what solar could do on your roof
Point at your rooftop, enter your electricity bill, and get system size, roof area, savings and payback — based on measured sunlight at your location, not a generic average.
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Search your address or drag the pin onto your roof — outlining the roof and marking any exclusions (chimneys, AC units, skylights) is optional but gives a more accurate estimate. Works with manual coordinates too.
Sets your tariff band (~€0.15/kWh) — used to size savings, and to fill in your peak units if you skip that field.
Your highest monthly kWh from the past year (as on your bill). We size from that peak so the system covers your busiest month.
Average monthly bill in EUR — we keep this figure alongside your peak usage above.
Know your exact per-unit rate? Enter it for a sharper savings estimate.
3 free previews per day. No sign-up needed.
Your estimate
Your recommendation appears here: system size, panels, roof area, yearly generation, savings, battery options and payback — sized with the same rules SriWatt uses for EPC projects.
System size— kW
Roof area needed— m²
Annual generation— kWh
Monthly savings—
Payback— years