The average lifespan of solar panels

Tags: Average Lifespan Solar

4 FAQs about The average lifespan of solar panels

How long do solar panels last?

Instead, we use its “useful life” to determine its lifespan, which is about 25 to 30 years. Solar panels slowly degrade and produce less and less electricity over time. Older solar panels can be useful for small applications with low electricity demands, but most people retire their solar panels after about 30 years.

When does a solar panel expire?

The “20% rule” refers to the point at which a solar panel has lost around 20% of its original efficiency, usually after 25 to 30 years of use. Panels are generally considered to have reached the end of their warranted life once they drop below 80% of their initial performance.

What happens to solar panels after 25 years?

After 25 years, your solar panels will likely still generate electricity, but at a lower efficiency. At this stage, you have three main options: keep them in service if they're still performing well; upgrade to newer, more efficient models; or recycle them through an approved solar panel recycling scheme.

What factors affect a solar panel's lifespan?

Several factors can reduce a solar panel's lifespan or accelerate performance loss. Poor installation can lead to water ingress, overheating, or electrical faults. Extreme weather, including hail, high winds, and prolonged heat, can cause gradual physical wear.

How Long Do Solar Panels Actually Last?

You can count on most photovoltaic solar panels to last 25 years before they begin to noticeably degrade. Most solar panel companies will provide a standard 25-year warranty for the expected life
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