How Long Do Solar Panels Last?

When investing in solar energy, understanding the longevity of solar panels is crucial. Let’s dive into their lifespan, factors influencing it, and ways to maximize their efficiency.

Typical Lifespan of Solar Panels

Most solar panels last 25 to 30 years, which is their "useful life." After this period, they continue producing electricity but at a lower efficiency typically around 80% of their original capacity.

The degradation rate of solar panels is a critical measure of their durability. According to a 2021 study by the National Renewable Energy Laboratory (NREL), most panels degrade at 0.5% to 0.8% per year. This means a panel with a 0.5% degradation rate will operate at 87.5% efficiency after 25 years.

Factors Affecting Solar Panel Lifespan

Several factors influence how long your solar panels last:

Panel Quality: Premium solar panels, like those from Maxeon, have lower degradation rates (as low as 0.25% per year) and better longevity.
Installation: Properly installed panels are more likely to withstand environmental stressors and remain efficient over time.
Weather Conditions: Panels exposed to extreme weather, such as heavy snow, hail, or strong winds, may degrade faster.
Maintenance: Regular cleaning and inspections help maintain optimal performance.

Do Solar Panels Lose Power Over Time?

Yes, solar panels gradually lose efficiency over their lifetime. On average:

In the first year, panels might operate at about 99% efficiency.
By the 20th year, their efficiency typically reduces to 90% or slightly lower for standard panels.

Extending the Life of Your Solar Panels

To maximize the lifespan of your solar panels:

Clean the Panels: Remove dust, debris, and dirt a few times a year to prevent shading and efficiency loss.
Inspect for Damage: Regularly check for cracks, scratches, or wiring issues.
Use Protective Equipment: Install robust mounting systems to safeguard against harsh weather.
Monitor Output: Use monitoring systems to track performance and detect potential issues early.

What Happens After Their Lifespan?

Solar panels don't stop working after 25-30 years; instead, they produce less energy. At this stage, you can:

Continue Using Them: They can act as a supplementary energy source.
Recycle Components: Panels are largely recyclable, with materials like silicon and glass being reusable.

Conclusion: A Long-Term Investment

Solar panels are a robust and sustainable energy solution, providing 25-30 years of reliable power with minimal maintenance. Investing in high quality panels and maintaining them well ensures optimal performance, making them a worthwhile addition to your home or business.

Got questions? Feel free to schedule a call let us help you make a smart, sustainable, and financially rewarding investment!