How Long Do Solar Panels Last in the UK Climate?

A solar panel system is a significant investment in your home's future, so it's natural to wonder: how long will it actually last? Especially with the famously variable British weather! The answer is reassuringly simple: solar panels are incredibly durable, built to last for decades, and come with warranties to back it up. As we head towards winter, let's explore the real lifespan of a modern solar installation.

The Lifespan of the Panels: 25+ Years

Modern solar panels are built to be tough. They are designed and tested to withstand everything from gale-force winds and heavy snow to torrential rain and hail. Because of this durability, most top-tier solar panels have an expected lifespan of 25 to 30 years, and many will continue to generate a usable amount of electricity for 40 years or more.

Understanding "Degradation Rate"

Solar panels don't just suddenly stop working after 25 years. Instead, their efficiency very slowly decreases over time. This is called the "degradation rate."

A typical modern solar panel has a degradation rate of around 0.5% per year. This means that after 25 years of service on your roof, it will still be operating at around 87.5% of its original efficiency – a tiny drop in performance over such a long period.

Warranties: Your Peace of Mind

To guarantee this longevity, solar panels come with two separate, long-term warranties:

1. The Product Warranty: This is like a standard warranty on an electronic device. It covers any defects in the manufacturing of the panel itself. This is typically for 12-15 years, with premium panels offering up to 25 years.

2. The Performance Warranty: This is the crucial one. It is a guarantee from the manufacturer that the panel will still produce a certain percentage of its rated power after 25 years. Most manufacturers guarantee an output of at least 85% at the 25-year mark.

What About the Other System Parts?

• The Inverter: This is the device that converts the DC electricity from your panels into the AC electricity your home uses. It is the hardest-working part of the system. A high-quality string inverter typically has a lifespan of 10-15 years and will likely be the only major component that needs replacing during the system's lifetime.

• The Mounting System: The racks and brackets that fix the panels to your roof are made from durable materials like aluminium and stainless steel, designed to last as long as the roof itself.

Conclusion

How Long Do Solar Panels Last in the UK? A solar panel system is a robust, reliable, long-term asset for your home. With panels built to last for over 25 years and backed by solid performance warranties, you can be confident that your investment will be generating free, clean energy for decades to come, regardless of the UK weather.

Ready to invest in a durable energy future? Contact Think Free Solar for a quote on a high-quality, long-lasting solar installation. 0800 994 9678