How this solar panel output calculator works
Array kW is multiplied by peak sun hours and system efficiency to estimate daily production, then scaled to a year.
How to use it
- Number of panels. Enter the value that applies to your situation.
- Panel rating. Enter the value in W.
- Peak sun hours. Enter the value in hours/day.
- System efficiency. Enter the value in %.
- Request the result. Add your email, then select “Email & show my result.”
What to do with the number
Peak sun hours are an energy-equivalent measure, not literal daylight hours. Use location-specific annual solar resource data for a more realistic estimate.
Planning estimate
Use this result as a starting point, not a guarantee. Product specifications, site conditions, manufacturer guidance, local codes, taxes, labor, tolerances, and rounding can change the real requirement or cost.