Everything solar, in one universe.
From solar cells and portable chargers to full roof systems and off-grid power. Compare gear, understand the real costs after the 2025 tax-credit changes, and run free calculators for your state.
Start with your state
Local rates, sun hours and incentives differ a lot by state.Don't see your state yet? Browse all calculators, more are on the way.
Pick your corner of solar
Four topic hubs, each with buying guides, comparisons and calculators.
Panels & Cells
Monocrystalline, TOPCon, perovskite and flexible panels: efficiency, cost per watt and what is worth buying.
Explore panels →Chargers & Power Stations
Portable solar chargers, power stations and EV-ready setups, tested and ranked by real-world output.
See chargers →Roof & Home Systems
Roof panels, solar shingles, batteries and inverters. What installers do and what it really costs.
Coming soonOff-Grid, RV & Boat
Cabins, vans, RVs and boats: size your panels, battery bank and charge controller without guesswork.
Coming soonThe solar tax landscape changed
The 30% federal residential credit for purchased systems ended after 2025. Lease/PPA ownership and battery storage follow different rules. Our calculators are being updated to reflect this, so check the incentive guide before you compare quotes.
Read the incentives guide →Calculators and financing tools
Know your numbers before you talk to an installer.
Lease / PPA Calculator
Compare a solar lease or PPA with buying, the path that still carries federal support.
Open tool →Solar ROI Calculator
Payback period and 25-year return for your bill and roof.
Open tool →Payment Calculator
Monthly loan payment against what you would save.
Open tool →Home Equity Options
See if a HELOC beats a solar loan for your project.
Open tool →Qualification Checker
Check whether your home and credit fit common programs.
Open tool →Loan Marketplace
Compare solar loan offers side by side.
Open tool →Find your state calculator
Local electricity rates, sun hours and incentives for each state.