Solar power is no longer a niche source of energy. Recent data shows that it’s now the nation’s fastest-growing source of electricity which means it could be here to stay.
If you’ve had you’ve been considering solar panel installation for your home or business, you might be wondering, “How long do solar panels last?” Read on to find out the average solar panel lifespan, what the rate of decline is, and how you can make your solar panels last longer.
How Long Do Solar Panels Last?
It’s true. Solar panels won’t last forever but exactly how long do solar panels last on a roof?
The standard life span of a solar panel is around 25 to 30 years. This doesn’t mean, however, that they’ll stop producing electricity once it hits 25 years. It means that the energy being produced will have declined significantly by its manufacturer’s standards.
Solar panels can continue to work and generate energy for many decades in the right conditions because they don’t have any moving parts. If your solar panels are not damaged by wind, debris, or other outside forces, you may still be able to eke out a few more years, and even decades.
Solar Panel Degradation
On average, a solar panel’s output falls by 0.8% every year. This rate of decline is referred to as the solar panel degradation rate.
This metric varies depending on which solar panel brand you have installed. Some premium manufacturers claim degradation rates as low as 0.3% and rates are improving as solar panel technology gets better.
Panels also come with multiple warranties that can give you a better idea of how long you can expect your solar panel to last. An equipment warranty certifies against any manufacturing defects while a performance warranty guarantees your panels will produce a certain amount of electricity. The performance warranty is the one that typically lasts 25 years and will give you a better sense of how much electricity to expect over time.
How To Make Solar Panels Last Longer
Solar panels are extremely durable but there are some things you can do to help your roof solar panels last longer. The number one thing you can do to ensure a long life out of your solar panels is to work with a reputable installer, like Blue Raven but here are some other ideas:
- Have them regularly checked by your installer
- Make sure your panels are securely mounted to your roof
- Keep your panels clear of debris
- Invest in solar panel critter guards to keep animals away
Find Out More About Solar Panels And What To Expect
Now that we’ve answered the question, “How long do solar panels last?”, it’s time to find out more about what to expect. There are many things to consider before committing to solar panels so continued learning is a must. Head to our Household section for more on solar panels and solar panel installation.