Samlex BBM-1225 Battery Backup Module, Converts External Power Supply (12 or 24VDC output) to provide battery charging and un-interrupted backup DC...

This unit is a solid-state device which allows uninterrupted DC power in association with a power supply and a battery. The transfer of load between the power supply and the battery is instantaneous. It also keeps the battery charged by providing float charge. Pre-set for 12V power supply Minor modifications for 24V power supply 2 year warranty