... . GoodWe GW4200-DS Advantages1) High quality of power generation connected to the grid: THDi < 2%.2) Maximize Solar Energy: High MPPT Efficiency ... rangeAccording to VDE-AR-N 4105, RD1663, ENEL, G59, SAAAC grid frequencyAccording to VDE-AR-N 4105, RD1663, ENEL, G59, SAATHD ...