Solar panels, also known as photovoltaic (PV) panels, are designed to be durable and long-lasting. On average, they can last for 25 to 30 years or even longer.
However, their longevity depends on various factors:
Quality of Manufacturing
High-quality solar panels tend to have a longer lifespan. Manufacturers often provide warranties for 25 years or more, guaranteeing a certain level of performance during that time.
Environmental Conditions
The local climate and environmental factors can affect the lifespan of panels. Extreme weather conditions, such as hailstorms or heavy snow, can potentially damage panels. In areas with harsh weather, regular maintenance and inspection may be necessary.
Maintenance
Proper maintenance can extend the life of solar panels. This includes keeping them clean and debris-free, checking for any physical damage, and ensuring that the electrical components function correctly.
Type of Solar Panel
Different types of solar panels have varying lifespans. Monocrystalline and polycrystalline panels are known for their durability and can last for decades. Thin-film panels may have a shorter lifespan in comparison.
Degradation Rate
Over time, solar panels may experience a gradual decrease in their energy production capacity, known as “degradation.” High-quality panels often have lower degradation rates, which means they maintain their efficiency for a more extended period.
Manufacturer’s Warranty
Solar panel manufacturers typically offer performance warranties that guarantee a certain level of electricity production (e.g., 80% of rated capacity) over a specified number of years (commonly 25 to 30 years).
If a panel’s performance falls below the specified threshold during this period, the manufacturer may replace or repair the panel.
The Bottom Line
Even after the manufacturer’s warranty expires, panels may continue producing electricity at a slightly reduced efficiency. Some older panels have been known to function for 40 years or more, albeit at a reduced output.
To maximize the lifespan of your panels, it’s essential to have them installed by reputable professionals, perform regular maintenance, and monitor their performance over time. Additionally, monitoring technological advancements and potential upgrades can help maximize your solar investment as newer, more efficient panels become available.