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How long do solar panels last?

Solar panel lifespan varies due to factors like panel quality, installation, and maintenance. Properly cared-for panels can last decades. High-quality panels are built to withstand elements such as sunlight, temperature changes, and weather conditions. Cheaper panels may degrade more quickly.

Manufacturers usually offer 20 to 25-year warranties, ensuring panels produce a certain power percentage after a set period (e.g., 80% after 25 years). Panels don't necessarily stop working after the warranty, just become less efficient. Over time, panels degrade, losing around .25 to 0.5% efficiency annually for high-quality ones. So, after 25 years, they might still work at 75% to 87.5% of original efficiency.


Regular maintenance, like cleaning and inspections, extends panel life. Environmental factors, like climate and humidity, impact longevity. Panels in harsh climates may degrade faster.


Solar inverters, converting DC to AC electricity, usually last less than panels, about 10 to 15 years on average. Advancing technology leads to more efficient and durable panels. Homeowners might upgrade before their panels fully depreciate to benefit from better tech.


In conclusion, panels last decades, but efficiency lessens over time. Good maintenance and installation are vital. When considering solar, consult with one of our Solar Experts and we can set you up with a personalized design with a 5-Star local installer!

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