Solar planner — panels, production, battery & cost for your roof

Independent solar planning for American homes. We never ask for your phone number and never sell your details. Our figures are planning estimates, not a site survey: see the methodology.

Plan

Solar planner
How many panels?
Battery backup
Quote check
Battery runtimes
Panels by usage

Data

Peak sun hours
Best panel angle
Solar by state & city
Solar cost by state
Open data

Trust

Methodology
About us
Contact & support
Guide to going solar
The installation process
Solar terms, explained
Videos and resources
Solar rule tracker

Solar data: NASA Langley POWER Project. Validation: NLR (formerly NREL) PVWatts®. Places: U.S. Census Bureau. Prices: U.S. EIA. Maps: © OpenStreetMap contributors, OpenFreeMap, USGS/USDA NAIP imagery. Photos: Pexels.