Do Solar Panels Lose Efficiency Over Time?

As technology improves, solar panels are becoming more and more efficient. However, you might be wondering if they lose efficiency over time. The answer is yes, but only by a very small amount. Keep reading this artilce to learn more about solar efficiency.

Solar panel efficiency

average lifespan of solar panels

Solar panels are designed to last for decades, with the average lifespan being around 25-30 years. However, the efficiency of the panel will degrade slightly over time. The average rate of degradation is around 0.5-1% per year.

Maintaining Your Solar Panels:

One of the most important things you can do to maintain your solar panel’s efficiency is to keep them clean. You can use a simple garden hose or a pressure washer to clean your panels. Just be sure to use a gentle setting so you don’t damage the panels.

How to tell if solar panels need to be replaced

If you notice a significant drop in your solar panel’s efficiency, it might be time to replace them. You can also have a professional come and take a look at your panels to see if they need to be replaced.

Solar panel efficiency

do solar panels degrade in storage

Solar panels can degrade in storage if they are not properly maintained. This is why it’s important to keep your panels clean and free of debris. If you do need to store your panels for an extended period of time, be sure to wrap them in a protective material.

solar panel degradation curve

Solar panel degradation is not a linear process. The degradation curve looks more like a U-shape, with the panel’s efficiency dropping quickly at first and then leveling off.

How do you calculate solar panel degradation?

You can calculate solar panel degradation by taking the difference in the panel’s efficiency from when it was new and its current efficiency. The average rate of degradation is around 0.5-1% per year.


Solar panels are a great way to reduce your carbon footprint and save money on your energy bills. Though they do degrade slightly over time, the average lifespan of a solar panel is 25-30 years. With proper care and maintenance, you can keep your solar panels working efficiently for many years to come.

What happens to solar panels after 25 years?

After 25 years, the average solar panel will have lost around 20% of its efficiency. However, this is just an average and some panels may last longer. With proper care and maintenance, you can extend the life of your solar panels.

How does temperature affect solar panel efficiency?

Temperature can affect solar panel efficiency, but the effect is usually minimal. In most cases, the drop in efficiency is less than 1%.

solar panel disposal
Disposing - Recycling Of old solar panels

Old solar panels can either be recycled or reused. The recycling process involves breaking down the panel into its component parts. The glass, metal, and plastic can then be recycled into new materials. Reusing old solar panels is also an option. In many cases, the panels can be refurbished and used again.

Contact Us To Learn More about solar Panels Lifespan

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Majeski Solar Is a Solar Installer company, and Top Tier Solar Installer in Washington D.C. , Virginia, and Maryland.

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