More Models are availableSUN-250G: B004TVEF8Y, Wind-250G: B008BDAQDYSun-300G: B005N2WHDI, Wind-300G (10.8V ~ 30VAC): B007WQBK2C,Wind-300G (10.8V ~ 30VDC): B005N2OLZUSun-500G: B008CNM1SQ, Sun-S500G-HI: B005N29SGMWind-500G (10.8V ~ 30VAC): B007WQDKMA, Wind-500G-HI (22V ~ 60VAC): B007X0L2C0Wind-500G (10.8V ~ 30VDC): B005N2ST9E, Wind-500G (22V ~ 60VDC): B007X0OVGOSun-600G: B007XAEINU, Sun-600G -HI (10.8V ~ 30VDC): B005N2VLO4Operation Procedures1, Connect the Solar Panel DC supply cables to the DC input terminal of the inverter, be sure that the polarity is correct. Recommended DC input cable size for maximum output is 8AWG or cables that can handle more than 30A. Optimal length would be less than 8m, longer cables will experience higher voltage drop.2, Connect the supplied AC power cord to the inverter and plug it to a home wall socket.3, The 3 green LED indicators will start to cycle from left to right when the grid and DC supply is detected. This indicates the inverter is operating under normal condition. The rate of the cycling is according to how much power is being output from the solar panels. The more big output power is, the more fast the rate is. If there is no AC grid detected, the red LED will be on, the inverter will not put out power, and this is called "Island Protection"Electrical SpecificationsNormal AC Output Power: 900WMaximum AC Output Power:1000WAC  Output Voltage Range: 90V ~ 130V ACAC Output Frequency Range: 46Hz ~ 65HzTotal Harmonic Distortion(THD): <5%Power Factor: 0.99DC Input Voltage Range ( Optional ): 22V ~ 60V DCPeak Inverter Efficiency: 92%Standby Power consumption: <1W