GoodWe GW5000A-MS Grid-Tied PV Inverter – Open Box. Condition: Open box / Return item. This unit is in excellent, like-new cosmetic condition. It was part of a return or open box inventory. Please note: It is missing a couple of small hardware pieces and the mounting bracket. These parts are easily available online or through GoodWe distributors. The main inverter unit itself is complete and in great condition. Type: Grid-Tied PV Inverter. Feel free to reach out if you have any questions or need more pictures.