100% brand new, high qualiy. Model:GMI300, GMI600 , GMI700. Grid Tie Inverter MPPT Range 24-40V. Vmp(of a solar panel) must be in the MPPT range to ensure the good output efficiency Recommended Solar Panel Voltage: Vmp30-39V; Voc38-46V Solar panel power cannot exceed 300W/350W/500W/600W/700W Micro Grid Tie Inverter Doesn’t work with battery. Grid Tie Microinverter is a compact unit, which directly converts direct current into alternating current for powering appliances and/or office equipments and connecting to utility grid. The AC output from Smart Micro inverter is synchronized and in-phase with the utility grid. Product Model:DataBox24G Applicable Microinverter:All Microinverter of SG series DataPlus Supported:No Power Voltage:Power by USB (5V, without external power supply) Interface Type:USB-A 2.0 Communication Distance:50 meters (Visual Distance) Communication Interface:2.4G Wireless Communication Protocol:NETSGP1.2 Max. Microinverter Supported:999 units Communicating Power Consumption:105mW Standby Power Consumption:5mW Waterproof Level:IP45 Size (W x H x D):70mm x 60mm x 24mm Weight 0.22kg OS:Windows OS, Windows Server Size:5MB Support Language:English, Chinese Minimum RAM Requirements:1GB Min. Disk Available Space:1GB Data Storage Location:Local hard disk Auto Data Collect Interval:Adjustable (5/10/15/20/30/40/50/60/80/100/120/150/180/240mins) Max. Microinverter Supported:999units (Without DataPlus) / 999999units (With DataPlus) Max.