As more homeowners and businesses invest in solar energy, one of the most common questions is; how long do solar panels last? Understanding the solar panel lifespan is crucial when considering solar as a long-term investment.
Fortunately with the help of modern advancements, solar panels are more durable than ever, offering decades of reliable, clean energy. Let’s dive into how long solar panels typically last, what affects their durability and what you can do to extend their lifespan and get the best bang for your buck.
The average lifespan of solar panels
Most high-quality solar panels are built to last 25 to 30 years, with new tech steadily increasing this number. However, this doesn’t mean they suddenly stop working after that time. Instead, their efficiency gradually declines.
Typically, solar panels degrade at a rate of around 0.5% to 1% per year, meaning they’ll still be producing electricity even after 30 years, just at a slightly lower efficiency. Some premium panels can even maintain over 80% of their original efficiency well into their fourth decade.
The key benchmarks for solar panel lifespan are as follows.
- 10 years: 90-95% efficiency
- 20 years: 80-90% efficiency
- 25-30+ years: 75-85% efficiency (or higher for premium panels)
Many solar panel manufacturers offer warranties of 20-25 years. So either way, you have a guarantee that your system will perform at a high level for at least two decades.
What affects the lifespan of solar panels?
Several factors can impact how long your solar panels last and how efficiently they generate power over time.
Panel quality
Not all solar panels are made the same. High-quality panels from reputable manufacturers tend to have taken the right precautionary measures.
- Better materials (e.g., monocrystalline silicon for higher durability)
- Stronger frames to withstand extreme weather
- Advanced coatings that resist UV damage and moisture
By using reputable installation services, you can be confident in having premium solar panels from leading brands, ensuring long-lasting performance.
Weather and environmental conditions
While solar panels are designed to endure the elements, extreme weather can impact their longevity.
- High temperatures can accelerate degradation over time.
- Hailstorms and debris can cause physical damage.
- Heavy snow loads may put stress on the panels.
- Salt exposure in coastal areas can lead to corrosion.
That said, most modern solar panels undergo rigorous testing to withstand hail, wind and heavy rain.
Installation quality
Poor installation can reduce the lifespan of your solar system. Proper mounting, secure wiring and correct angling all play a role in maximising efficiency and durability. That’s why professional installation by experienced engineers is crucial.
Maintenance and cleaning
Although solar panels require minimal upkeep, regular maintenance can help them last longer.
- Keeping them clean: Dirt, leaves, and bird droppings can block sunlight and reduce efficiency.
- Inspecting for damage: Small cracks or loose connections should be addressed early.
- Checking inverter performance: The inverter (which converts DC to AC power) may need replacement after 10-15 years.
Fortunately, many solar energy systems now come with monitoring software. You can easily track performance and detect issues before they escalate without needing to clamber up onto your roof every few months.
How to maximise your solar panel lifespan
With all of the above factors taken into account, there are a few simple steps you can take to make sure your solar system is set to last as long as it can.
- Choose high-quality panels from trusted brands.
- Ensure professional installation to avoid damage and inefficiencies.
- Perform routine maintenance by keeping panels clean and checking for issues.
- Monitor performance to detect and fix potential faults early.
- Invest in battery storage to enhance energy efficiency and reduce wear from excessive power cycling.
Making sure your solar panels are a long-term investment
With a lifespan of 25-30 years or more, solar panels are a long-term investment that continues to deliver energy savings and sustainability benefits for decades.
While efficiency may decline slightly over time, regular maintenance and quality components can help extend their lifespan. Whether you’re looking to power your home, business, or entire community, solar energy remains one of the most cost-effective and reliable renewable energy solutions available.
At Oakray Renewables, we offer high-quality, future-proof solar solutions designed to maximise efficiency and longevity. Download our guide blow to explore your solar options.
