How long do solar panels last?
Photovoltaic solar panels are designed to be very simple and durable.
But over the years,
can cause some wear and tear.
Still, most panels are guaranteed to produce at least 80 of their rated power after 25 years.
Which means they’ll be around long after they’ve paid back their initial cost.
The 25-year “useful life” of solar panels, has been the benchmark for decades, but recent studies* of modern panels show it should be closer to 35 years.
*DNV-GL 2016, NREL 2012
Major manufacturer solar panel efficiency.
Solar Payback & Cumulative Savings 35 vs. 25 years
So 35 years of production (instead of 25) means 40 more energy for the average U.S. home, increasing the profit from an investment in solar by $18,000.