AFI 710-140A Battery Isolators & Voltage Sensitive Relays

The ignition protected Digital Voltage Sensing Relay can be surface or panel mounted and allows the charging of a second battery from a single charging source. When the voltage on the start battery rises to a level indicating a 60% charge, the VSR engages allowing the 2nd battery to charge. When charging stops and voltage falls the VSR will disengage isolating the two batteries from each other isolating the starting battery from the house bank. Dual sensing functionality enables the sensing of two battery banks allowing two way charging.

• Isolates electronics from harmful electrical surges from starter and winch motors


• Simple to install 3 wire connection, leaves alternator wiring intact


• No voltage drop vs. diode isolators


• Ignition protected


• Surface or panel mountable

WARNING: Some Products may contain chemicals such as DEHP, which can cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.