How this solar panel quantity calculator works
Daily energy per panel equals panel kW multiplied by peak sun hours and system efficiency; target energy is divided by that output.
How to use it
- Target daily energy. Enter the value in kWh/day.
- Peak sun hours. Enter the value in hours/day.
- Panel rating. Enter the value in W.
- System efficiency. Enter the value in %.
- Request the result. Select “Show my result.” No account or email is required.
What to do with the number
Roof orientation, shading, temperature and local weather determine real annual production. Use a site-specific solar production estimate before making an equipment purchase.
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.
