Question Isolating coach batteries from house batteries.

[lostinfla]

Since I've changed to lithium for house power, I've been toying with the idea of not using the engine alternator to charge the house bank as it will last much longer than the daily drive to power what we use before plugging in again, then the inverter takes over the program. I have a lithium BIM installed and wondered if removing and isolating the coach line side from it would do the job, or eliminate it all together. What say ye?

 

[Rollin Ollen]

Since I've changed to lithium for house power, I've been toying with the idea of not using the engine alternator to charge the house bank as it will last much longer than the daily drive to power what we use before plugging in again, then the inverter takes over the program. I have a lithium BIM installed and wondered if removing and isolating the coach line side from it would do the job, or eliminate it all together. What say ye?

I, too, am interested in the replies and how difficult will taking the charge away from the alternator?

 

[lostinfla]

A far as I can see, the function of the LBIM is that it joins the chassis and house batteries for charging with a limit of 15 min on and 15 min off so as to not overwork the alternator, and for use as a boost, which is connecting both together in the same way. I would think it would only be a matter of removing the house battery lead from the unit, therefore charge would be going only to the chassis batteries from the alternator, The other way to do it would be to remove the feed wire at the chassis battery bank. I'll do a little more research and give it a try this week.

 

[Richpatty]

There should be no issue removing the line coming from the LiBim from the house batteries. What I have wanted to do is put in a heavy duty line switch in the battery compartment so I can choose when I want the alternator to charge the batteries or not. This would also preserve the “Boost” feature if you needed to bridge the batteries if the chassis die for some reason.