What if there is a problem with the Photovoltaic system?
If a PV module has a defect or no longer produces electricity or, under identical conditions, produces much less electricity than before, it is generally covered by the manufacturers performance guarantee against a drop in efficiency of more than 20%. Most manufacturers indeed propose performance guarantees on modules of 20 and 25 years for 80% of the initial output power. On the electronic components and accessories (inverters), the guarantee usually does not exceed 10 years although longer inverter insurances can be arranged.
