Factory Battery Connections

[chemist308]

So, I've got three 200 AH 12V LiFePO4 batteries and a 60 amp LiFePO4 compatible converter / charger. I wanted to tie the batteries into RV DC power, and was going to wire a separate run to the bus bar in the front of the RV that the lead acid battery formerly hooked to (edit: just to be clear I'm deleting the former battery). The factory original converter charger was a 55 amp unit, which I also presume had multistage capability to protect the lead acid battery health.

Anyway, when I looked at the bus bar (and related wiring) the old battery was connected to, I wondered how those thin wires carried the short bursts of amps required for the leveling system, let alone the continuous feed of a 55 amp converter/charger.

So for those who have wired in LiFePO4 battery banks, did you use the existing factory bus bar in the front? If not, what did you do?

[chemist308]

Just to put it in perspective, I laid a piece of 4/0 and a piece of 4 AWG in there with it. Did that to show you what I’m talking about. I’d run 4 AWG at a minimum to supply the DC side and charge the batteries. But, can I connect to that? That’s what the battery was connected to, with a 55 amp converter/charger.

[gbkims]

Just to put it in perspective, I laid a piece of 4/0 and a piece of 4 AWG in there with it. Did that to show you what I’m talking about. I’d run 4 AWG at a minimum to supply the DC side and charge the batteries. But, can I connect to that? That’s what the battery was connected to, with a 55 amp converter/charger.

For lithium battery(s) install; seems new bus bars for the battery leads and 4 Awg from converter to land on, then 6 Awg from new bus bar to OEM bus bar would be one way to wire it.

Lots of choices on the bus bars, Fastronix, Blue Sea, BEP Marinco.

Probably your DC wiring is similar to ones with 5 auto reset CBs up front: