Acouto Voltage Sensitive Relay 12V 125A VSR: Dual Battery Automatic Charging Relay & Smart Battery Isolator Review

12V VSR---- A voltage sensitive relay (VSR) is the best way to ensure you can always get your dual-battery vehicle started. No voltage drops comparing to battery isolator diodes (0.6V). Continuous Current Rating: 125A. Intermittent Current Rating: 140A. Dual Battery Isolator---- Automatically combines two batteries when charging and isolates the two batteries when not charging. Once your main starter battery is sufficiently charged, the voltage sensitive relay will begin charging the second battery too. Compatiblilty---- Dimensions fits Heavy Duty Modular Fuse Box Series (BF43x) and Battery Switch, matching mainstream products in market. This voltage sensitive relay is suitable for 12V Marine, Off-Road Vehicles, RV, 12V Auto & Solar Systems. High Quality VSR---- The voltage sensitive split charge relay has a solid glass fiber reinforced nylon shell. The voltage sensitive relay adopts professional manufacturing process, with stable performance, high precision and good reliability. LED Indication---- Built-in LED indication (ON when VSR engages). Surface or panel mount options provides flexibility when installing. Storage Mode allows zero power consumption when engine is off.