Solis S5 20kW Dual MPPT 3-Phase Grid Tie Inverter. Grid-tied inverter for a professionally designed solar array. Model S5-GR3P20K. Three-phase grid-tied inverter with 20kW rated output and dual MPPT input. Supports up to 30kW PV DC input. Includes AFCI, AC/DC surge protection and an IP66 enclosure. Battery storage is not included.