The voltage sensitive relay allows the charging of two separate battery banks from a single charging source such as vehicle alternator with no risk of flattening your main battery.
Reference: Voltage Sensitive Relays
This battery isolators are small and suitable for almost anywhere, for ATV, UTV, Boats, RV’s,marine vehicles, trucks, and caravans
Continuous Rating : 12VDC/60A or 140A available
Engage Voltage: 13.3VDC
Disengage Voltage: 12.8VDC
Screw Fit Base
Not suitable for vehicles fitted with smart alternators