... installation easier. They are the ideal inverters for small PV plants, or individually for small houses, both indoors and outdoors.Features1.Efficiency ... over 97.60%;(2) With dual MPPT. Suit-able for installing solar modules with different angle of dip;2.Safe(1) IP65 ... -3-2:3,EN61000-11:12Maintenance5 years,(10 years Optional) Grid-tied Solar Inverter(4KW,5KW,6KW)