The Li-BIM monitors the battery voltage of both the Lead Acid Chassis and Lithium Coach
batteries over long periods of time. If it senses a charging voltage, it connects the two batteries
together. If the charging system is drastically overburdened, the batteries will be isolated,
however, if the Li-BIM sees a long term charging of both batteries it will allow the batteries to
remain connected and allow the charging system to do its job.