Solar Panel Roof Calculator
Estimate solar panels for roof area
sq ft
hrs
Formula
Output = Panels × Watts × Sun Hours × 0.8
80% system efficiency accounts for inverter loss, shading, temperature.
Examples
400 sqft, 400W panels, 5 sun hrs
22 panels, 8.8kW, ~$3,802/yr savings.
Frequently Asked Questions
About Solar Panel Roof
Estimate solar panel capacity for your roof.