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Old 06-16-2019, 09:46 PM   #1
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2014 Interstate Ext. Coach
Irvine , California
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2014 AI lithium upgrade

Hello all. I'm looking for a little guidance on my recent lithium upgrade. I replaced my 5-80A Lifeline AGM's with 2-100A Battleborns. Do I need to remove/replace the Precision Circuits BIM to ensure proper charging of the coach and chassis batteries?
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Old 06-17-2019, 07:00 AM   #2
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I'm taking on a Battleborn replacement of lead acid batteries in my new-to-me 2013 AI Ext Lounge, and from what I've learned from users like gmillerok1 and lewster, uncle_bob, and others in the forums here is that you'd remove the OEM BIM and add a dc-dc charger between the alternator and the batteries. There are several threads where this is discussed as a peripheral part of the main conversation, but I haven't found a detailed thread on this topic specifically. Here's an example of one http://www.airforums.com/forums/f240...ml#post2222648

My components will be delivered in the next week or so and I'll be tackling this project shortly thereafter to get ready for our first trip out on the rig around Lake Michigan.

Hopefully some users with experience in this can weigh in with their recommendations as I've had to piece things together from several threads.
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Old 06-18-2019, 08:37 AM   #3
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You can see my recent upgrade here:
2015 GT 300 Ah Lithionics Battery Upgrade
http://www.airforums.com/forums/show....php?p=2229431

I removed the OEM BIM and replaced with a Chargemate Pro 40 to comply with MB alternator draw recommendations. Mine disconnect the alternator with the lithium bank is fully charged. There are other options you could use available from battleborn.
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Old 06-18-2019, 12:24 PM   #4
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Thanks for the link Schmitte - great job on the install. At Battleborn's recommendation, I have a Sterling 60 amp battery to battery charger and the Magnum ME-ARC50 (they aren't stocking the ME-RC50 any longer) remote coming. Battleborn recommended against the their LiBIM225 for only a 2 battery bank, as they were concerned the amp draw from the alternator would be too great over the long term and battery longevity would be impacted.
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Old 06-18-2019, 07:21 PM   #5
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Quote:
Originally Posted by Schmitte View Post
You can see my recent upgrade here:
2015 GT 300 Ah Lithionics Battery Upgrade
http://www.airforums.com/forums/show....php?p=2229431

I removed the OEM BIM and replaced with a Chargemate Pro 40 to comply with MB alternator draw recommendations. Mine disconnect the alternator with the lithium bank is fully charged. There are other options you could use available from battleborn.
The only possible issue with the Chargemate is that it is not designed for lithiums. It will work, yes, but will not fully charge the lithium bank. In addition, the Chargemate manual explicitly warns not to mix different types of batteries. I will likely be using this charger that has a profile specifically for lithium.
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Old 06-18-2019, 07:23 PM   #6
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Originally Posted by nateallen80 View Post
Thanks for the link Schmitte - great job on the install. At Battleborn's recommendation, I have a Sterling 60 amp battery to battery charger and the Magnum ME-ARC50 (they aren't stocking the ME-RC50 any longer) remote coming. Battleborn recommended against the their LiBIM225 for only a 2 battery bank, as they were concerned the amp draw from the alternator would be too great over the long term and battery longevity would be impacted.

That's a good recommendation. I prefer the Redarc for size and ease of use, however, it is limited to 40 amps. I understand Redarc is coming out with a new higher amp model.
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Old 06-18-2019, 07:54 PM   #7
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The Chargemate / MB alternator will charge my bank to 99% SOC, which is good enough for me
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Old 06-18-2019, 09:38 PM   #8
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The Chargemate / MB alternator will charge my bank to 99% SOC, which is good enough for me

Actually, lithiums like to be stored at less than full charge, so that may actually be a good thing anyway.
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