GoodWe SMT Series 80kW On-Grid String Inverter. Grid-tied inverter for a professionally designed solar array. Model GW80K-SMT. Three-phase grid-tied string inverter with 80kW nominal output and six MPPT trackers. Type II surge protection on AC and DC sides with an IP66 enclosure. For commercial and industrial photovoltaic systems; grid-tied operation alone does not provide battery backup.