Solar Calculator

Our free solar system sizing calculator helps you determine how many solar panels you need for your home. Select your state, average electricity bill, and roof details.

Electric Bill

ⓘ

Use your average monthly bill

$300

System Size

0.0 kW

Panels Needed

0×0W

Energy Offset

⚡

State

ⓘ

State-level sun hours used for calculations

Select state

Utility Provider

Select utility

Roof Direction

ⓘ

South-facing roofs are most efficient

Select direction

Panel Wattage

ⓘ

Higher wattage = fewer panels needed

Select wattage

Battery Storage

Optional