GoodWe has taken part in PV storage testing by the University of Applied Sciences (HTW) in Berlin for the third consecutive year, with a total of 21 different storage systems in the 5 and 10 kilowatt power classes examined to determine System Performance Index (SPI). The two GoodWe hybrid inverters tested, the ET and EH, achieved an SPI of 93.4% and 91.2% respectively, together with BYD batteries.