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Solar Guides

Rooftop solar can cut electric bills for decades, but the numbers depend on your rates, your roof and how you pay. These guides explain solar costs, financing choices and battery storage in plain terms so you can judge an installer's pitch with confidence.

Rooftop solar panels on a suburban home

All Solar guides

4 guides

Going solar is one of the largest home projects most people take on, and the rules changed in 2026. The 30% federal residential solar credit ended for systems installed after December 31, 2025, so older rules of thumb about payback may no longer hold. State, local and utility incentives still exist in some areas, which makes careful, home-specific math more important than ever.

How to use these guides

Start with is solar worth it to learn how to estimate payback from your own electric bills and utility rules. Then read our guide to solar panel cost to understand price per watt and how to size a system, so you can compare installer quotes on equal terms.

Once you know a system makes sense, decide how to pay. Our comparison of solar lease vs. loan vs. cash covers leases, power purchase agreements, dealer fees on solar loans and what each option means when you sell your home. If backup power or low export credits are on your mind, see solar battery storage.

Planning solar on an older roof? Check our guide to roof replacement cost first, since removing and reinstalling panels later adds expense.

Key terms to know

  • Kilowatt (kW): The capacity of a solar system; 1 kW equals 1,000 watts.
  • Kilowatt-hour (kWh): A unit of energy, used on your electric bill to measure what you consume and what panels produce.
  • Price per watt: Total installed price divided by system watts, the easiest way to compare quotes.
  • Net metering: How your utility credits solar power you send back to the grid.
  • PPA: A power purchase agreement, where you pay a set rate for power from panels a company owns.
  • Dealer fee: A financing charge on some solar loans, often built into the system price.