UPS's battery pack provides extended runtime for compatible Tripp Lite SV-series three-phase UPS systems. It uses a +/- 120 VDC configuration and must be hardwired to a compatible UPS system. Multiple battery packs may be connected in parallel to increase runtime even longer. A UL-listed DC circuit breaker protects against too much current. This 120 V UPS battery pack is made from heavy-gauge welded steel with a baked powder-coated finish that protects the cabinet from chipping and corrosion.