When you decide to install solar panels, you are not only opting for a clean and sustainable energy system, but also for a long-lasting and low-maintenance solution. But how long can solar panels really last and what care do they need to maximize their performance? In this article, we explain how long solar panels remain functional, what factors influence their lifespan and how proper maintenance can keep them generating efficient energy for decades. If you are considering this investment or already have a solar system, here you will find everything you need to keep it in perfect condition.
How long do solar panels last?
Solar panels have an average lifetime of 25 to 30 years. However, this does not mean that they stop working after this period. After their nominal lifetime, solar panels continue to generate electricity, but with reduced capacity and efficiency.
Solar panels lose about 0.5% efficiency per year, depending on panel quality and environmental conditions. For example, after 25 years, a panel could still be operating at 80-85% of its original capacity.
Therefore, investing in solar panels not only guarantees energy savings in the short term, but also long-lasting benefits thanks to their long service life and minimal maintenance.
Factors affecting service life
- Quality of materials: Monocrystalline panels tend to have greater durability.
- Weather conditions: Prolonged exposure to rain, snow, wind or extreme temperatures can accelerate wear.
- Proper maintenance: Periodic cleaning and technical inspections help to prolong its performance.
- Correct installation: Professional installation ensures that the panels are protected against structural damage.
Manufacturer’s warranty:
Most manufacturers offer two types of warranty:
- Product warranty (10 to 15 years): Covers manufacturing defects.
- Performance guarantee (25 years or more): Guarantees that efficiency will not drop below a specified percentage (usually 80-85%).
How much maintenance do solar panels require?
Solar panels require very little maintenance, as they have no moving parts. However, it is important to perform some periodic tasks to ensure their efficiency and durability:
Basic maintenance tasks:
- Cleaning of the panels:
- Dust, leaves, bird droppings and other debris can reduce performance.
- It is recommended to clean the panels 2 to 4 times a year, depending on the area and the accumulation of dirt.
- Use water and a soft cloth or sponge. Avoid abrasive products to avoid damaging the surface.
- Periodic visual inspection:
- Check for cracks, physical damage or debris accumulation on the panels.
- Check the condition of connections and wiring for signs of wear or corrosion.
- Performance monitoring:
- Supervise the power production through the inverter’s monitoring system. If you notice a significant drop in performance, a technical check may be necessary.
- Annual professional review:
- Hire a specialized technician at least once a year to perform a complete overhaul of the system, including the panels, inverter and electrical connections.
Additional considerations
- Extreme weather: After storms, hail or high winds, check panels for damage.
- Snowy areas: If the panels are covered with snow, remove it carefully to avoid prolonged blockage of sunlight.
In summary, solar panels require periodic cleaning and annual inspections to ensure maximum performance.
Solar panels are a long-term investment that can offer decades of benefits, provided that basic maintenance is performed and attention is paid to possible wear factors. Their durability and low maintenance make them an ideal solution for saving on energy costs and contributing to a more sustainable future. With professional installation and proper care, your solar panels can continue to produce energy efficiently for much longer than you think, andwith proper maintenance, they can last more than 25 years while maintaining their efficiency. Make the most of their potential and enjoy the benefits of a clean and reliable energy source – the sun will always be within your reach!