BEP Digital Voltage Sensing Relay DVSR - 12/24V [710-140A]Digtal Voltage Sensing Relay (DVSR) 12 24V The Digital Voltage Sensing Relay (DVSR) allows the charging of a second battery bank from any single charging source. When the voltage on the charged bank rises sufficiently, the DVSR engages allowing the 2nd battery bank to charge. When charging stops and voltage falls, the DVSR automatically isolates the battery banks, ensuring that engine start batteries are kept fully charged. Digital circuitry provides