Solar Panel Count Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the daily energy needed, panel size and sun hours.
- Press Calculate.
How it works
Panels = daily energy needed (Wh) ÷ (panel watts × peak sun hours), rounded up.
Worked example
10 kWh/day, 400 W, 5 sun hours. = 5 panels.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.