Your roof and solar: what the FTC lists
Pitch, age, condition, direction, and shade all change the power a system gets.
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What the FTC lists
The FTC says the power you get depends on "the pitch (angle), age, and condition of your roof, and the direction it faces" and on "environmental factors like snow, dust, or shade that may cover the system."
Sunlight
The FTC also lists "the average number of hours of direct, unshaded sunlight your roof gets annually."
An older roof
For lease and PPA bids, the FTC says to compare "what happens if you need to repair your roof after the system is installed." Whatever you choose, ask about the roof in writing before you sign.
Stay off the roof
Roof work involves fall hazards. Do not go on a roof based on anything on this site. Use licensed or registered professionals as your state requires.
What we do not say
We do not say whether your roof suits solar, and we do not inspect roofs.
This is general information, not tax, financial, legal, or engineering advice.
Sources: FTC, Solar Power for Your Home.
FAQ
General information only. We are not a contractor, installer, lender, or tax adviser. We do not refer, match, vet, rate, or check contractors, and we do not collect your information. Before you hire anyone, verify their license or registration with your state (in Washington, use the Department of Labor & Industries' Verify tool), get written bids, and read every contract and financing document. For tax questions, see IRS.gov or ask a tax professional.
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What holds the panels.
