... making installation easier. They are the ideal inverters for small PV plants, or individually for small houses, both indoors and outdoors ... modeRS485 , EXTOptional communication modeWiFi , Ethernet , GPRS(External modular design , connected to EXT)Mechanical ParametersDimension(H x W x Dmm)560 ... 3-2:3,EN61000-11:12Maintenance5 years,(10 years Optional) Grid-tied Solar Inverter(4KW,5KW,6KW)