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Are we benchmarking inverters on the basis of outdated definitions of the european and CEC efficiency?

: Burger, B.; Schmidt, H.; Goeldi, B.; Bletterie, B.; Bründlinger, R.; Häberlin, H.; Baumgartner, F.P.; Klein, G.


Sinke, W. ; WIP - Renewable Energies, München; European Commission; UNESCO; World Council for Renewable Energy; International Photovoltaic Equipment Association:
24th European Photovoltaic Solar Energy Conference 2009. CD-ROM : The compiled State-of-the-Art of PV Solar Technology and Deployment. Proceedings of the International Conference held in Hamburg, 21-25 September 2009
München, 2009
ISBN: 3-936338-25-6
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <24, 2009, Hamburg>
Conference Paper
Fraunhofer ISE ()

The formulas for the calculation of the European Efficiency have been developed in 1990. At that time, the irradiance was measured manually every three hours. Out of this data, hourly values were interpolated. The weighting factors for the European Efficiency were calculated with these hourly values. If we recalculate the weighting factors with currently available instantaneous values of the irradiance, different results are achieved.