These powder-coated aluminum, rainproof array combiners will accept DIN-rail mounted 150v circuit breakers, MidNite 300VDC breakers, or 600VDC fuse holders for grid-tie arrays. A plastic cover provides a dead front for safety and can be knocked out for either breakers or fuse holders. Both a negative busbar and ground bar are included. The aluminum NEMA 3R enclosures are approved to be mounted at angles from 90 to 14 degrees (14 degrees = 3/12 slope). ETL Listed to UL 1741 for the U.S. and Canada. Breakers and fuse holders are not included. See Electrical Distribution Parts section for breakers, fuses and fuse holders.