The MidNite Solar MNBCB 500/50 DC battery combiner box brings multiple battery-string connections into one organized enclosure. Rated at 500A and up to 150V DC, it includes positive and negative busbars with 3/8-inch studs for battery cable connections. Designed for indoor battery storage installations, its powder-coated Type 1 enclosure provides multiple conduit knockouts and mounting locations for optional circuit breakers. The MNBCB 500/50 is ETL Listed to UL 1741 for use in the United States and Canada. Key Features 500A busbars: Positive and negative busbars provide a central connection point for multiple battery strings. Flexible cable routing: Combination knockouts accommodate different conduit sizes. Optional breaker support: Mounting locations for 4 large and 20 small MNEDC circuit breakers. Indoor enclosure: Type 1 construction for indoor installations. Made in the USA: Backed by a 5-year manufacturer warranty. Technical Specifications Model MNBCB 500/50 Rated current 500A Maximum DC voltage 150V DC Busbars 500A positive and negative busbars Connection studs 3/8 inch Enclosure Powder-coated, Type 1 indoor Dimensions 26 11/16 x 17 5/16 x 4 11/16 inches 3/4-inch and 1-inch combination knockouts 24 1-1/2-inch and 2-inch combination knockouts 8 Large breaker locations 4; for optional MNEDC-125 or MNEDC-175-250 breakers Small breaker locations 20; for optional MNEDC 1-100A breakers Certification ETL Listed to UL 1741 for use in the United States and Canada Warranty 5 years Country of manufacture USA Included and Optional ComponentsIncludes the combiner enclosure and 500A positive and negative busbars. Circuit breakers are optional and sold separately. The 500A/50mV MNSHUNT and third busbar MNBCB-BUSBAR500 are optional accessories and are not included. Product DocumentationDownload the MidNite Solar battery combiner brochure (PDF)