About Sunfinder
Independent solar data for US homeowners
Sunfinder exists because the solar industry has a trust problem. Most "solar calculators" online are operated by installers or lead-generation companies whose business model depends on making solar look as attractive as possible — regardless of whether it actually makes sense for your home.
We built Sunfinder to give homeowners honest, data-backed answers: How much will solar actually produce in your city? What does it really cost? When does it pay off? No pitch, no pressure, no email required.
What makes us different
Truly independent
We have no partnerships with solar installers, no referral fees, and no lead generation. Our only revenue is display advertising (Google AdSense). That means our numbers are never skewed to make solar look better — or worse — than it actually is.
Real data, not estimates
Solar yield figures come from PVGIS, the EU Joint Research Centre's satellite radiation database — the same source used by researchers, governments, and utilities worldwide. Electricity rates come directly from the U.S. Energy Information Administration.
City-level precision
Most solar sites give you state-level averages. We pull PVGIS data at the exact coordinates of each city — so Phoenix and Flagstaff get different numbers, because they should. 250 cities across all 50 states.
Monthly updates
Solar data and electricity rates change. Our automated pipeline re-queries PVGIS and EIA on the 1st of every month, so the numbers you see reflect current conditions, not last year's data.
What we cover
Editorial standards
All data on Sunfinder comes from the primary sources listed on our Methodology page. We do not accept sponsored content, paid placements, or installer partnerships.
Incentive data (state tax credits, net metering policies, SREC programs) is reviewed quarterly and updated when policy changes are announced. We note the data date on every page where incentives are discussed.
Solar economics are genuinely location-specific. A payback period that makes sense in Massachusetts may not make sense in Louisiana. We show you the actual numbers for your city rather than national averages designed to make solar look universally attractive.
Contact
Found a data error? Have a question about our methodology? We want to hear from you.
hello@sunfinder.xyz