COMPROD's battery backup system that is compatible with Comprod VHF/UHF/700/800 and 900 MHz BDAs. This battery backup is part of a complete solution for NFPA compliance. Battery and charger / rectifier, up to 24 hr backup time. Universal input: 100 – 250 V 1phase-60Hz, Input protection: AC breaker (1 pole), Output: 27 VDC at 20 A with less than 100 mV ripple, Load protection: DC breaker (2 poles), Dry contact alarms for the following conditions: High or low DC volts AC power or rectifier failure Disclaimer: Actual backup time depends on the actual connected load, battery temperature and aging.