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. Add your email, then select “Email & show my result.”
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.