The Battery Isolation Manager (BIM) isolates two battery systems, chassis and coach. This prevents loads in one system from discharging both. It also connects the two systems while charging. Both batteries are charged if either is being charged. The coach battery is charged while driving and the chassis battery is charged when plugged into shore power.

Draws no current in On or Off state
Excellent for Solar Panel use

Monitors battery state over longer periods of time
Not simply voltage dependent

Ignition and Waterproof

Isolates batteries to prevent discharging or overcharging

The BIM monitors the battery voltage of both the chassis and coach batteries over long periods of time. If it senses a charging voltage, it connects the two batteries together. Once the batteries have charged for 1 hour, the BIM will isolate the batteries to prevent overcharging, and only reconnect the batteries if one of the batteries drops to 80% charge.