Egis Triple XD Flex Relay w/Knobs [8630-2535]Triple XD Flex Relay with Knobs Set of three programmable relays designed for use in 12 or 24 VDC lithium battery systems. Typically the two outer devices would be set up as remote on off switches and the middle one would be set up as an Automatic Charge Relay. The relay settings are programmable and the list of available options is optimized for lithium batteries.