How Long Do Solar Panels Last in Florida? (2026)

The short answer

The U.S. Department of Energy says residential solar panels usually last 20 to 25 years, and NREL, the federal solar lab, assumes a 30-year life when it models home systems. The panels don't hit a wall at that age; they keep producing, just less. The string inverter, the box that turns the panels' power into household current, usually lasts 10 to 15 years, so plan on replacing it once. Microinverters, which sit under each panel, tend to last about as long as the panels.

How fast panels lose power

NREL researchers pulled together more than 11,000 measured degradation rates from almost 200 studies in 40 countries. For crystalline silicon panels, the standard type (98% of the 400-watt-plus models on California's certified list), the median loss was 0.5% to 0.6% a year and the mean 0.8% to 0.9%, and most panels declined in a fairly straight line.

Share of original output, by panel age

Straight-line decline at the median and mean rates NREL found

0.5% a year: 87.5% left at year 250.8% a year: 80% left at year 25

Source: Jordan, Kurtz, VanSant and Newmiller, Compendium of Photovoltaic Degradation Rates (NREL, 2016). NREL's 2024 cost baseline for home solar assumes 0.7% a year.

So a 25-year-old system still makes roughly 80% to 88% of what it did when new, and the savings shrink by the same share. Our production guide shows what a system makes in year one.

What Florida's heat does

Panels are rated at a cell temperature of 25°C (77°F), and a Florida roof runs much hotter than that. We pulled hourly results for a roof-mounted system in Orlando from PVWatts, NREL's solar model:

A typical July day in Orlando: panel vs. air temperature

Average by hour of day, roof-mounted panels, PVWatts typical-year weather

Panel cells: about 129°F around noonAir: 87°F at the same hour

Source: PVWatts v8 hourly output (National Laboratory of the Rockies, formerly NREL), Orlando, 20° tilt, south-facing. Clock time.

Weighted by when the sun is shining, those panels averaged about 109°F over the whole year and peaked near 167°F. Heat cuts output as it happens: every panel's datasheet lists a temperature coefficient, the share of power lost for each degree Celsius above 25°C. On the California Energy Commission's list of more than 22,000 certified panels, the median is about −0.36% per °C, and for panels listed since the start of 2025 it's about −0.30%.

That difference shows up on a Florida roof. Using the Orlando hourly temperatures, a −0.30% panel loses about 5.3% of its yearly output to heat, and a −0.40% panel about 7.1%. Heat may also speed up aging: the NREL compendium found that hotter climates and mountings that keep panels hot "may lead to higher degradation in some, but not all, products."

Salt air near the coast

Salt spray corrodes metal frames, connectors and junction boxes. The international standard for this is IEC 61701, which "describes test sequences useful to determine the resistance of different PV modules to corrosion from salt mist" for panels working in wet, salty air. If you live near the beach or the Intracoastal, ask whether the panels have passed salt-mist testing and what corrosion protection the racking and fasteners have.

Hurricanes and lightning

An upscale Florida home with rooftop solar shown twice side by side, new with a young staked palm and decades later with the palm grown tall, the panels still intact

Built for Florida

Racking listed to UL 2703 and wind design under ASCE 7 are Florida Building Code requirements. In Miami-Dade and Broward, products also need a Notice of Acceptance.

A system's biggest short-term risks in Florida are storms. How the racking is attached matters more than the panel glass; our guide to solar panels and hurricanes covers what failed in past storms, and our lightning guide covers strikes and surges.

Warranties: three different promises

Warranty	What it covers	What to check
Product (materials)	Defects in the panel itself.	How many years, and who pays for labor to swap a bad panel.
Performance (power)	A minimum share of rated output after a set number of years.	The yearly loss it allows, compared with NREL's measured median of 0.5% to 0.6%.
Workmanship	The installation: roof penetrations, wiring, racking.	How long it lasts and whether roof leaks are included.
Inverter	The inverter or microinverters, under a separate warranty.	Its length versus the 10 to 15 years a string inverter usually lasts.

Any warranty is only as good as the company behind it. Our guide to what happens if your solar company goes out of business covers how to protect yourself. Panel makers can also void a warranty for damage from the wrong cleaning methods; see how to clean solar panels safely.

What to look for in panels for Florida

A low temperature coefficient. About −0.30% per °C or better; each 0.1 point is worth nearly 2% of yearly output on an Orlando roof.
A performance warranty close to real-world aging. A promised yearly loss near 0.5% matches what NREL measured.
Current safety certification. The California Energy Commission's list shows each model's certification; most newer panels list UL 61730.
Salt-mist testing if you're near the coast. Ask for IEC 61701 results for the panels and corrosion ratings for the racking.
An inverter plan. Know whether you're getting a string inverter you'll likely replace once, or microinverters, and what each warranty covers.
Wind-rated installation. Racking listed to UL 2703 and designed for your wind zone, confirmed on the permit plans.

Brand names matter less than these specs, and every one of them is printed on the datasheet or the permit plans.

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Common questions

How long do solar panels last in Florida?

Usually 20 to 25 years or more, according to the U.S. Department of Energy, and NREL assumes a 30-year life when it models home systems. Panels don't stop at that age; they keep producing at a gradually lower output, about 0.5% to 0.6% less each year at the median NREL found.

How much power do solar panels lose each year?

NREL's compendium of more than 11,000 measured rates found a median loss of 0.5% to 0.6% a year for crystalline silicon panels and a mean of 0.8% to 0.9%. At those rates a 25-year-old panel still makes roughly 80% to 88% of its original output.

Does Florida heat shorten the life of solar panels?

It lowers output right away and may speed up aging. In PVWatts modeling for Orlando, roof-mounted panels averaged about 129 degrees Fahrenheit around noon in July. NREL's compendium found that hotter climates and mountings may lead to higher degradation in some, but not all, products.

How long do solar inverters last?

The U.S. Department of Energy says string inverters usually last 10 to 15 years and may need replacing during the life of the panels, while microinverters tend to last about as long as the panels.

What are the best solar panels for Florida?

Look for specs rather than brands: a temperature coefficient around minus 0.30% per degree Celsius or better, a performance warranty with a yearly loss near 0.5%, current UL 61730 safety certification, salt-mist testing to IEC 61701 if you're near the coast, and racking listed to UL 2703 and designed for your wind zone.

Do solar panels still work after 25 years?

Yes, at reduced output. At NREL's median degradation rate, a panel keeps about 87% of its original output after 25 years; at the mean rate, about 80%. The inverter is more likely to need replacing before then.

Temperature and loss figures come from modeling for one Orlando roof; your panels, roof and location will differ. Sources: U.S. Department of Energy, A Consumer's Guide to Buying a House with Solar Panels · Jordan, Kurtz, VanSant and Newmiller, Compendium of Photovoltaic Degradation Rates (2016) · Jordan and Kurtz, Photovoltaic Degradation Rates: An Analytical Review · NREL Annual Technology Baseline 2024, residential PV · PVWatts v8, National Laboratory of the Rockies (formerly NREL) · California Energy Commission, PV module list (September 2026) · IEC 61701:2020, salt mist corrosion testing of PV modules. Reviewed September 2026.

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