Best way to monitor 2 lithium batteries connected in parallel?

DIY
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1

Hi,

I would like to monitor two lithium batteries connected in parallel on my boat. Do I need to provide a Smartshunt IP65 for both batteries or just one Smartshunt for the entire battery pack?

Thank you for your advice.

Louis

2

With 1 smartshunt for the pack you’ll have all but one information…you won’t know if both batteries are actually working.

I have that situation, and once in a while , when my wife is pulling 2kw, i take my clamp amperemeter and check that both batteries deliver their half of the load.

But i’m on the road…

3

If the batteries have bluetooth enabled BMSs inside then you can see they are both OK, then you need only 1 SmartShunt. If you have a GX device then you should only have 1 shunt for the whole battery bank as the GX device can only use 1 shunt for the controlled battery bank.

4

Thank you very much. So I think that I should monitor with one smarthsunt for each one to get the max security on Lifepo

5

Then actually you should use 3..

One for the GX device, two for you

But, as @pwfarnell said, only if your batteries have NO bluetooth communication