Thor Forums

[bevedfelker]

It doesn't technically charge them both at the same time. The BCC or the BIRD/Trombetta senses the charge state of the battery banks. When it sense 13.1 volts for 2.5 minutes, the BCC isolator or the Trombetta opens and the other battery bank charges. So rather than a simultaneous charging, it is being automatically switched back & forth.

The isolation function of the BCC or the Trombetta keeps the weaker battery bank from drawing g down the fully charged bank if they were both connected at the same time.