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What is the life span of a photovoltaic panel ?
Despite the inexhaustible nature of solar energy, a photovoltaic installation is not eternal! It remains a highly durable product, as it generally does not need to be moved to fulfill its role. The average lifespan of a solar panel is about 30 years, with a big difference between the ranges: from 20 years, to 50 years for the most solid. Very often, a photovoltaic installation does not stop working without showing signs of weakness! In fact, during its own lifetime, a solar panel will see its performance gradually decline. Its power guarantees are about 90% in the first 12 years, and then rise to a level around 80% efficiency after 25 years of existence. This estimated lifetime was validated in laboratory tests carried out in 2014 on solar panels installed for more than 25 years. The results even show much lower losses than the guarantees mentioned above.
What are the guarantees on solar panels ?
At DAEL SOLAR, the product guarantee extends to 25 years for photovoltaic modules and micro-inverters.
DAEL SOLAR also provides a performance guarantee. It is automatically included in the offer, there is no additional subscription required. This guarantee concerns exclusively the performance of the photovoltaic modules installed. The level of performance of this assembly, expressed as a percentage of the original power of all the modules, is guaranteed as follows
– minimum guaranteed nominal power in the first year: 98% ;
– then maximum degradation of 0.5% per year with a minimum of 93.5% of the nominal power at 10 years and a minimum of 86% of the nominal power at 25 years.
DAEL SOLAR also reimburses the analysis costs and undertakes to replace the defective photovoltaic modules if the analysis is conclusive.
Power cut ? In the event of a general power outage, if your system is composed of traditional solar panels, it automatically goes into standby mode and the solar energy stops being harvested and injected. Your photovoltaic system goes into neutral. An inverter decoupling system cuts off all operation (it’s the law!), to protect property and people. When the power comes back on the grid, your photovoltaic system will start up again by itself, without you having to do anything.
I can only produce solar electricity when the weather is nice and warm ?
It is a common misconception that a solar installation only produces electricity when the weather is good. Not true! Photovoltaic panels work in all seasons, as long as they receive light. However, since it depends on light energy, production varies depending on the amount of sunlight the solar panel receives. In other words, your photovoltaic panel system produces less electricity when it rains or is cloudy, but it is by no means at a standstill! A photovoltaic system will generate more solar energy in an area where the weather allows for maximum sunshine. However, it is quite possible to make your solar investment profitable in regions not known for their good weather, such as the north of France or Brittany.