The MNPV4HV-DISCO 3R-DLX combines up to 4 PV strings of up to 600VDC. It is not compatible with the MidNite Solar Birdhouse unless you install the MNDISCOPSB Power Supply Board (sold separately; however, the Power Supply Board comes pre-installed on this 6-string version (MNPV6HV-DISCO 4X-PSB)).
Includes four 15-amp, 600-volt touch-safe, DIN rail mounted fuses (10mm x 38mm) and MidNite's 600VDC surge protection device pre-installed. The red handle is lockable in the off position.