Lithium Battery Wiring Diagram

[Rich-MLsRV]

Here's an almost complete picture. I used the existing lead acid battery bay. I thought removing the lead acid tray would be difficult. It turned out to be relatively easy since Newmar had the tray bolted rather that welded. As far as enclosing that battery area I wanted easy access to the slide motor so the bolts can be torqued as part of regular maintenance. Currently, I have not completed enclosing the batteries. With some screws and warmer weather I'll be able to complete. It's been cold here in CO.

I ended up going with Battleborn batteries as the LifeBlue were back ordered until end of December if not later. Battleborn had a Black Friday sale so that helped with the price.

I still have tape on the negative terminals. When installing I had tape covering both positive and negative as I was paranoid about shorting while connecting wires.

The 6 awg across the front of the batteries is the solar pre-wire. Next project will be installing solar.

 

[Chuggs]

First thing...remove the ME-BTS. Lithiums do not need temperature compensation.

You should consider swapping the BIM you have with the Li-BIM, or a manual tie relay...dc-dc Charger.

https://www.amazon.com/dp/B07DY8S815/?tag=rvf01-20

Lastly...some method of keeping them above 32 degrees...

I just replaced my batteries with AGMs...I am watching for better development of methods to incorporate Lithiums into a MotorCoach with two battery systems. If nothing else good developes...I am looking at doing some things to prep...

1) Remove the 10w Zamp Solar panel...and replacing it with a 200w panel and Victron SmartSolar MPPT75/15 controller. I want the chassis to be self-maintaining.

2) Figure out where the Oasis loop fluid lines going to the dash area are...splice another heat exchanger in...with coin thermostat like the wet bay has. This to be used only for cold wax to prevent Lithiums from shutting down.

3) When I installed the Lithiums...enclose and insulate the bay. Remove the BIM, and place a cross tie relay for BOOST feature...and two DC-DC chargers to allow the Alternator to share amperage while driving. Mainly so I can run a rooftop a/c with my Inverter while driving.

 

[Rich-MLsRV]

@Chuggs - Thanks for your thoughts.

I did install the LI-BIM.

I am on the fence as to whether install a method to heat the battery bay. The Battleborns operating temp is -4F to 140F. BBs won't charge below 25F. I have a Govee WiFi temp sensor in the battery bay to monitor temperature. I typically don't camp in these temperatures. Later I'll decide what to do.

 

[Chuggs]

Nice job!


I didn't know they could operate that low. With the ME-ARC, you can set AC-IN to a time range...so, if you know temps are going to dip at night...the Magnum Inverter will disconnect for a time...and no charging would even be attempted. With Victron Solar, you can set a temperature relay. So charging wouldn't be an issue. And wow...I think 10 F is the lowest I've seen. Guess those Battleborns are good stuff. I have a friend that had eight of them in his Ventana. I loved looking at the operating voltage. Cuts down on amps used...when the voltage helps make up the wattage.

Battery Porn... my Lifeline getup.

 

[Kevin D Pem]

Like @Chuggs said. Nice Job! Also his concern about temperature. Lithium develops dendrites when charged at freezing. The problem with saying you will not be camping at those temps is the solar can still be charging at those temps. Insulate and heat(even if that means a incandescent light fixture and lamp in the bay. Put the light on a thermostat.