Warranties and upkeep: what to get in writing

Equipment warranties, workmanship, and who maintains the system, all in the contract.

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Warranties in the bid

The FTC says bids should say "what warranties apply to the equipment" and the installation workmanship, and "whether there's a guarantee it will produce a certain amount of energy."

Who maintains it

The FTC says: "When you own a system, you're responsible for maintaining" the panels and equipment, unless the seller includes that in the contract. For a lease, the FTC says "The leasing company will probably be responsible for system maintenance."

How long you plan to stay

The FTC asks how long you plan to stay in your home. It says: "A residential solar system is designed to stay on a home for at least 20 years. If you think you might move within 20 years, find out how buying and installing a system, compared to leasing a system or signing a PPA, might affect your ability to sell your house." We do not give lifespans for any product. Read the warranty.

Repairs

For lease and PPA bids, the FTC says to compare "the warranties and repairs included, and how long they last."

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.

Warranties, in writing. Per the FTC. The note is ours.

This is general information, not tax, financial, legal, or engineering advice.

Sources: FTC, Solar Power for Your Home.

FAQ

How long do solar panels last?

We do not give lifespans. Read each warranty and the contract.

Do I need to clean my panels?

We do not say. Follow the maker's instructions and the contract, and do not go on the roof.

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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Reading a solar contract before you sign

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Next: inverters and batteries