The DC Modular Remote Battery Switch (RBS) is a bidirectional solid-state relay with very low power consumption when turned on. This will ensure that it can operate for a very long time, even if the battery is almost empty. A second benefit is that it can switch bidirectional currents. This means that it can be used with devices which both can charge and discharge, like a combined charger/inverter.
See the wiring diagram for the connection of the The DC Modular Remote Battery Switch.
Check more details about the DCM-RBS-12-500 here.