One of the most common questions we are asked is. “How long do solar panels last?” It’s a great question and an important one if you’re considering solar for your home or business. Solar panels are a long-term investment, so understanding their lifespan and performance over time is crucial.
Lifespan of Solar Panels
On average, solar panels are designed to last 25 to 30 years. With many premium-quality models continuing to perform for 40 years or more.
- Optimal Performance: Most solar panels, including those from LONGi and Trina Solar, operate at peak efficiency during the first 25–30 years.
- Gradual Degradation: Solar panels naturally degrade over time, typically at a rate of 0.5% to 0.8% per year, meaning they can still perform at approximately 87.5% of their original capacity after 25 years.
Warranty Coverage
Leading manufacturers offer robust warranties to ensure long-term reliability:
To name a few:
- LONGi:
- 30-Year Limited Performance Warranty: Guarantees at least 98% efficiency in the first year, with a maximum decline of 0.45% annually and guarantees 85% efficiency at year 30.
- Trina Solar:
- 25- Year Warranty: Panels retain up to 81.9-84.8% output by year 25
- 30- Year Warranty (Dual Glass): Premium panels deliver up to 87.4% output by year 30.
When choosing solar panels, warranty length is an important consideration as it reflects the manufacturer’s confidence in their product.
- Shortest Warranty: VSUN comes with a 12-year warranty, covering basic defects and workmanship. This is generally the minimum offered in the industry.
- Longest Warranty: Premium manufacturers, such as Maxeon Solar Technologies, offer an impressive 40-year warranty, covering product, performance, and service. These panels guarantee reliability and efficiency for four decades, far exceeding the industry average of 25–30 years.
These warranties reflect the durability and reliability of modern solar panels. Providing peace of mind and significant energy savings well into the future.
Maximising the Lifespan of Your Solar Panels
Several factors influence how long your solar panels will last. But with the right choices and care, you can ensure their longevity and optimal performance:
- Choose High-Quality Panels: Panels from reputable manufacturers offer better durability, slower degradation rates, and strong performance warranties.
- Professional Installation: Proper installation by trusted experts ensures panels are securely mounted, optimally positioned, and free from issues like loose wiring, stress, or wind and water damage that can shorten their lifespan.
- Environmental Conditions:
- Panels in moderate climates generally last longer than those exposed to extreme weather conditions like hailstorms, high winds, or intense heat.
- Regular cleaning and maintenance, particularly in dusty or snowy areas, prevents buildup and keeps panels functioning efficiently.
- Solar Panels and Bird Protection: Birds nesting under panels can cause a lot of damage to the panel and wiring and along with reducing efficiency. It also greatly increases the chance of fire. To prevent this, optional solutions like mesh guards, bird blocker and bird brush can be fitted during or after installation to protect your system and maintain performance.
- Solar Panels and ARC Boxes?
These safety devices, which prevent electrical arc faults and fire risks, must be installed separately. These are small boxes that fit over the site made connections to reduce the risk of fires developing in solar installations whether in-roof, or on roof.
By focusing on quality products, professional installation, and regular upkeep. You can significantly extend the life of your solar panels and maximise your return on investment.
Ready to Invest in Solar?
If you’re ready to explore the benefits of solar energy, contact Sustainable Electrical Services today. Our team of experts will guide you through every step of the process, from selecting the best panels to ensuring a seamless installation.
Invest in solar today and enjoy clean, renewable energy for decades to come!
