IBS Dual Battery System ?

[paflytyer]

I'm in the process of installing an IBS Dual Battery System (with RBM) in my truck. As I'm going through the system I don't understand how the system recharges the batteries if one has lower voltage than the other.

If I camp somewhere and use the inverter, fridge, camp lights and external DVD player and deplete the aux battery, it will take forever for that battery to recharge because the regulator will send the electricity along the path of least resistance, correct? In other words, it will send a charge to the main battery and very little to the aux battery, in turn taking a very long time to recharge the battery I really need charged.

Has anyone experienced this? Any electronics guys want to chime in? Or, am I wrong?

 

[Fast Eddy]

If it's the expensive one I just googled, you would just hit the 'link' button once the rig was started and the main battery would flood the aux battery and charge it halfway up pretty quickly. If you have a good alternator, I would guess that both batteries would be at full charge within 20 minutes or so.

 

[RobRed]

When the truck is running the link solenoid is closed connecting both batteries. The alternator is pushing current to both when connected and to the truck it will look like one giant battery. It's true the aux will charge at a slower rate but it's not forever. Yes I have the IBS.