Solar Panel Calculator

Estimate PV system size, annual energy production, monthly output distribution, savings, and payback time.

Daily limit for your plan: 10 uses

Inputs

PV sizing + savings

Annual consumption (kWh/year)

Panel power (W)

Irradiation (kWh/kWp/year)

System losses (%)

Includes inverter, temperature, wiring, soiling.

Self-consumption (%)

How much PV energy you use directly at home.

Electricity price (per kWh)

Installed cost (per kWp)

Roof & conditions

Adjusts production estimate

Orientation

Tilt (degrees)

Shading

CO2 factor (kg/kWh)

Results

Estimates

Fill in the inputs and click Calculate to see the estimate.

About Solar Panel Calculator

Use this Solar Panel Calculator to estimate the recommended PV system size (kWp), number of panels, annual production, monthly production distribution, approximate yearly savings, and simple payback time. Results are estimates and depend on local irradiation, roof conditions, and consumption profile.