... :records real-time info accurately InstructioniMars BG4KTL / BG5KTL / BG6KTL are transformerless inverters with high efficiency. With aluminum housing, Integrated interface system ... 97.60%;(2) With dual MPPT. Suit-able for installing solar modules with different angle of dip;2.Safe(1) IP65 ... :3,EN61000-11:12Maintenance5 years,(10 years Optional) Grid-tied Solar Inverter(4KW,5KW,6KW)