Amazon.com: Dual Battery Isolator Kit 12V 140Amp Manual and Auto modes Voltage Sensitive Relay VSR Compatible with RV Marine Car Vehicle Truck Caravan Camper Yacht ATV UTV Boats,Not Fit for lithium batteries :
VEVOR VEVOR Split Charge Relay Kit, 4mtr 12V, Automatic Dual Battery Isolator Kit with 140AMP Voltage Sense Relay VSR, Compatible with RV Marine Car Vehicle Truck Caravan Camper Yacht ATV UTV Boats