Solar Panel Calculator
Calculate solar panel system size, energy production, and return on investment. Plan your solar installation with accurate estimates.
How to Calculate Solar Panel Requirements
- 1 Enter your monthly electricity usage from your utility bill (kWh)
- 2 Select your location or enter average peak sun hours per day
- 3 Input panel wattage and system loss percentage
- 4 Enter electricity cost and system cost per watt
- 5 View recommended system size, panels needed, and payback period
🔒 Instant results, faster than AI. No signup. 100% private.
Last updated: January 15, 2026 · v2.1