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randy-putnam asked

Proper cable wiring for BMV 712 shunt and MPPT on parallel LFP batteries

My boat’s house bank has 2 100AH Battle Borns wired in parallel and I’m installing the BMV712 smart shunt today. I will connect the “battery” side of the shunt to the negative post of the “back” battery. The loads are going from the “front” negative post of the other battery to a bus bar. In my previous house bank I had always connected the positive lead on the MPPT and plug in charger to the front positive post and the negatives of the MPPT and plug in charger to the negative post of the back battery for balanced charging. If I keep this configuration with the new LFP house bank will it interfere with accurate readout from the BMV712?

BMV Battery Monitor
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Paul B avatar image Paul B commented ·

I think a wiring diagram of how you propose to do this would be helpfull, just for clarity. as your description is confusing/ not clear maybe incorrect

I will connect the “battery” side of the shunt to the negative post of the “back” battery. The loads are going from the “front” negative post .


Please supply a wiring diagram as all negative loads should come off the load connection on the shunt.

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Paul B answered ·

good to here you got it all sorted, a tidy battery box and connections also helps a lot

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