Tools

Solar Output Calculator

Estimate how much electricity a solar project will generate each year — pick a region preset or set the capacity factor directly. Results update live.

Project inputs

Choosing a preset sets the capacity factor below; you can fine-tune it with the slider.

Estimated output

Annual generation

22,776 MWh

≈ 22.78 GWh per year

Average monthly generation

1,898 MWh

Homes powered per year

≈ 2,169

CO2 avoided per year

≈ 19,360 tonnes

At an approximate grid average of 0.85 tonnes of CO2 per MWh.

Assumptions

  • Annual generation = installed capacity × 8,760 hours × capacity factor.
  • Region presets set typical capacity factors: US Southwest 26%, US average 20%, Middle East 24%, Southeast Asia 16%, Central Europe 12%. Actual output varies with irradiance, panel orientation, shading and system losses.
  • Homes powered assumes 10.5 MWh per home per year.
  • CO2 avoided assumes 0.85 tonnes of CO2 per MWh — an approximate grid average; the real figure depends on the local generation mix.

Related reading: Joule Post's US solar payback analysis.