Experience has shown that a large number of solar systems are not utilised to their full potential since the financial consequences of “hotspots” and failed modules or strings are only known to a few customers. Given that many plants have been in operation for ten years or more and that performance has usually not been checked for a long time, it is time to help customers get the maximum return on their investment.
HOW TO CALCULATE
YOUR EARNING INCREASE
The German feed-in tariff (EEG) sets a fixed annual price for kilowatt hours (kWh) produced over a period of 20 years. This informed your decision to invest in your PV system. Defects in your system lead to yield losses, with varying effects. Our detailed inspection report gives you an accurate estimate of the extent to which the defects affect the yield of your system.
PRIVATE 16,2 kWp ROOF-MOUNTED SYSTEM
"I never thought that there was so much power hidden in my system. Additional profit of just under 9,700 euros over the remaining term of 13 years"
Mr Arheit has installed a 16.2 kWp roof-mounted system on his single-family house. He operates the installation himself. When he installed the system eight years ago, he wanted to invest in the future – both in the future of technology and that of his family. The PV system was put into operation in 2009 and the Arheit family receives a feed-in remuneration of 40.01 ct/kWp.
For the owner of the PV system, a loss of yield due to defects also means a financial loss. The table shows this loss, relative to the feed-in tariff and the number of years of future operation.
PRIVATE 100 kWp ROOF-MOUNTED SYSTEM
"If I'd known what type of design errors can occur, I would have done the inspection earlier."Roman Scholz
Mr Scholz wanted to use the flat roof of his factory building sensibly and installed a 100 kWp system. The plant was only installed in 2012; Mr Scholz was entitled to a guaranteed feed-in tariff for another 15 years. Unfortunately, the design of the plant was not carried out correctly. Among the defects that were discovered were three failed strings, which significantly reduce the yield of his plant.