20 years is important because that's about how long solar panels are warrantied to last. . Two million California ratepayers have invested in solar energy with the understanding that they would be on a program called “net metering” for 20 years. Net metering lets solar customers sell the extra electricity their panels make back to the power company, lowering their bills, while also. . Investing in solar panels is a smart move for your wallet and the planet, but it's also a long-term commitment. Contracts often las 20 years or more. You don't buy the system or own anything installed on your property ing the term of the contract, you're entitled to use all the ower the system produces. You'll probably buy less power from your electricity. . A standard solar panel warranty should come with at least 10 years of protection, though many premium options now offer 25 or even 30+ years of coverage. They come in two main varieties—equipment warranties and production warranties—and both can save you quite a lot of money in the long run.
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