How much power generation capacity do solar panels retain after 10 years? Here’s the breakdown.

Solar Panels: People often have several questions after installing solar panels. One common question is: How much electricity-generating capacity remains after 10 years?

Solar Panel Lifespan: While solar panels are widely used today, their installation involves a significant investment. They are generally viewed as long-term investments, yet their operational efficiency declines over time. So, if you are installing solar panels on your roof, how much power generation capacity will remain after a decade? If you are unsure, here is the answer.

How much does the capacity drop?

The rate at which a solar panel's capacity decreases depends on its quality. For high-quality panels, the capacity might drop by approximately 0.3% to 0.5% annually. However, you likely won't notice a significant impact during the initial years.

What is the capacity after 10 years?

Regarding capacity after 10 years: if a panel's capacity degrades by 0.5% annually, it will retain about 90% to 95% of its original capacity after a decade. In other words, the same panel will generate 5% to 10% less electricity than it did when new.

How long do solar panels last?

High-quality solar panels typically continue to function even after 25 years. Remarkably, even after 25 years, they can still generate approximately 80% to 87% of their initial power output. However, ensuring they continue to perform well over the long term requires proper care. Periodic cleaning and necessary maintenance are crucial; with such care, solar panels can continue generating electricity for a long time.