... );4.Communication(1) With strong networking, flexible to support RS485, Ethernet, WIFI, GPRS and other communication modes ... -270 (AS4777); 184-276(ENEL Guide line)Grid Frequency50Hz/60HzPower factor≥0.99(at nominal power)Output ... , Grid monitoring , Island protection , Short circuit protection , Over temperature protectionDisplay and CommunicationDisplay3.5inches, LCD displaying , support backlit ...