This standard guidelines for measuring the efficiency of power conditioners used in stand-alone and utility-interactive photovoltaic systems, where the output of the power conditioners is a stable AC voltage of constant frequency or a stable DC voltage. The efficiency is calculated from a direct measurement of input and output power in the factory. An isolation transformer is included where it is applicable.
DS/EN 61683:2001 history
2001DS/EN 61683:2001 Photovoltaic systems - Power conditioners - Procedure for measuring efficiency