How Long Do Solar Panels Last?
Solar panels last about 20 years, according to the Federal Trade Commission.
But there’s much more to the answer than that.
The exact number would depend on several factors, like the type of the panel, the way the system is installed, the climate where you live, and the maintenance.
The great news is that, with proper maintenance, your panel may actually run for as long as 40-50 years.
What is the Solar Panel Degradation Rate?
The solar panel degradation rate on average is 0.5% per year.
This is the rate at which your panel efficiency reduces over time.
Basically, it shows the quality of your panel — the smaller the rate, the longer your panel will keep its properties.
A degradation rate of 0.5% per year means that, after a standard 25-year long warranted service, your solar panel system will provide 87.5% of its factory output.
5 Tips on How to Make Your Solar Panels Last Longer
- Regularly get your panels checked and maintained
- Replace inverters after 10 years
- Maintain and replace batteries
- Keep your panels clear of debris and other materials that may damage it
- Work with a trustworthy solar panel provider