How to use the Solar Panel Size
The Formula
Panel watts ≈ daily Wh ÷ (peak sun hours × efficiency). Peak sun hours depend on location and season—typical values range from 3–6 hours.
Practical Example
Real systems need extra capacity for cloudy days, battery losses, and inverter efficiency. Treat this result as a starting point, then add 20–30% headroom.
About Solar Panel Size
How this estimate works
Panel watts ≈ daily Wh ÷ (peak sun hours × efficiency). Peak sun hours depend on location and season—typical values range from 3–6 hours.
Add margin for real installs
Real systems need extra capacity for cloudy days, battery losses, and inverter efficiency. Treat this result as a starting point, then add 20–30% headroom.