Uncertainty evaluation of European efficiency in Photovoltaic inverter

In order to evaluate the accuracy of the European efficiency measurement result in Photovoltaic inverter, the uncertainty evaluation of European efficiency in Photovolatic inverter is searched in this paper. According to the standards of EN50530-2010 “Overall efficiency of grid connected photovoltaic inverters” and CNAS-GL08 “Guidance on evaluating the uncertainty in electrical apparatus testing”, the class A uncertainty of test results and class B uncertainty of testing equipment are evaluated. Based on this, the European efficiency is evaluated according to the calculation formula of inverter efficiency and European efficiency. The evaluation case indicated that the uncertainty evaluation method has practicality.