Solar Panel Savings Calculator

Estimate how much solar power your roof could generate and what it might save you per year. This is an approximate estimate—real results depend on location, shading, roof angle, and utility rules.

Check your utility bill for kWh.
Used for yearly savings estimate.
Only affects formatting.
Area suitable for panels (not total roof).
Peak sun hours roughly reflect location.
Trees/buildings can reduce output.
Optional: for payback estimate.
Accounts for inverter & real-world losses.
Sets roof area + sun level quickly.
How we calculate

System size is approximated from usable roof area. Generation is estimated as: size (kW) × peak sun hours/day × 365 × performance ratio × shading factor.