MidNite Solar MNPV3 Combiner Box - The MidNite Solar MNPV3 is used for 150Vdc charge controllers and 600 VDC grid-tie inverters. Will accept three 150 VDC (MNEPV) breakers or two 600 VDC fuse holders. Each unit has the same high-quality features, including: Gray aluminum type 3R outdoor rainproof enclosure with insulating dead front and stainless steel hardware. Multiple mounting options: vertical