Solar planning

Solar calculator

Estimate your recommended PV system size, yearly production, savings, CO2 reduction, and payback time in seconds.

Your data

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The model is the same quick estimator from the previous site, adapted to the SolarEcos interface.

Available roof surface60 m²Annual electricity consumption4'500 kWhRoof orientation (South = 100%)100%Electricity price28 ct/kWh

Include battery storage?

Recommended system size

10.0 kWc

Annual solar production9'000 kWh

1'530CHF savings/year

45%Self-consumption rate

4.5t CO2 saved/year

14Years to payback

Estimated annual consumption coverage100%

Estimated values based on Swiss averages. Actual production depends on location, roof shape, shading, and installed equipment.

How the estimate works

1 kWc per 6 m²Roof surface is converted into system size.

900 kWh/kWcAnnual production is adjusted by roof orientation.

35-75% EigenverbrauchBattery storage increases the self-consumption factor.

CHF 2'200/kWcInvestment estimate plus optional battery cost.

Need exact numbers?