Highly efficient, 150% PV oversized, 120% overload output for 60s, and built-in shadow tracking function. Economical, supporting high power solar panels, storing surplus energy from PV to battery, and low start output voltage for longer working time. Intelligent with switchover time of less than 20ms, 5 work modes, 2 charging periods available, and split-phase 120V and 240V output. Safe with NEMA 4X and integrated SPD.