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Old 01-14-2019, 07:51 AM   #1
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Battery compartment wiring 2018 2400R - help please?

I'm in the process of replacing my coach batteries with BattleBorn LiFePO4 Lithiums. I'm trying to better understand what is already existing, wiring-wise. There are two #2 red battery cables exiting the understep battery compartment. See attached. It is very difficult to trace them.
Where does Red #1 go to?
Where does Red #2 go to?

TIA
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Old 01-17-2019, 12:26 PM   #2
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If i understand the question correctly, one red lead goes to your Battery Isolation Manager (mine is on the left side of the stairwell) and the other goes to your converter.

If simply swapping batteries, hook them up identically.
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Old 01-17-2019, 01:41 PM   #3
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Ah HA – that makes perfect sense.
BIM controls the connection between the two 12v systems, allowing the engine alternator to charge the coach batteries if needed while l am driving the RV. It is simple a controlled connection between the two systems.
Other Red cable goes to/from the Charger/converter. “To” charger/converter when battery is powering the 12V circuits in the RV. “From” the charger/converter when shore power or generator is charging the coach batteries.
Thanks.
And, of course, re-connect everything identically when swapping batteries.

Bonus question: What are the two red cables INTO the Charger/Converter?
(Sorry, pic is upside down)
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Old 01-17-2019, 02:53 PM   #4
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I got a little worried....

I did a double take..... At first read and glance at the pic, I thought your existing batteries were 6V wired in series to form a 12V battery... But the wiring diagram shows that they are 12V.....and then I mapped out how the wires and the existing batteries are wired in parallel just like the schematic...


I agree, the 12v BB batteries should just drop in. I would check with BB to make sure your charging center is configured to optimally charge the BB Batteries.


g
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Old 01-17-2019, 03:43 PM   #5
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Not exactly a drop-in replacement

Shopping List:
  • Replacement batteries (two Battle Born BB10012, 100ah)
  • Upgrade charger to Li-specific (PD4060Li)
  • Monitor charge state of batteries (Victron BMV-712)
  • Protect batteries from total discharge (Precision Circuits BGA (with lithium-specific sensing cut-off voltage))
  • Three additional and/or longer battery cables
  • Plus a copper busbar to connect battery (-) to Victron shunt (this is a work-in-progress)
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Old 01-17-2019, 04:03 PM   #6
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In case you were wondering

I just purchased a Berkshire XL 40C and the first upgrade I want to do is replace the 4 6V batteries with 8 Battle Borns (maybe even more)



I am doing the math to compare and contrast all battery versus solar.... i am thinking all battery might win..


this is why i am paying attention all the threads with Battle Born Batteries...
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