question

mfred68 avatar image
mfred68 asked

How do i balance/ equalise my batteries

I have 6 parallel wired Rahvolt 7kwh batteries, they have rgb led lights on them, indicating the soc, (white 100% cyan 75%, green 50%, blue 20% , red under 15%)

While 4 batteries are green, one is cyan and the other is blue, so this clearly shows that the batteries are not all equal soc. I was hoping they would balance out after being connected in parallel for over a week, but this has not happened (more than likely because the soc curve os so flat on lifepo4 batteries.

I am assuming the cells in each bank are balanced by the bms, but how to I balance the bank of 6 batteries?

I only get a combined soc reading1000037495.jpg on the vrm

battery charging48v batteryBattery Balancer
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1 Answer
Justin Cook avatar image
Justin Cook answered ·

I would start by contacting the battery manufacturer for their recommendations/suggestions. Rahvolt isn't a Victron-known/compatible/supported brand so there's probably a limited amount of advice any of us in the Victron world could offer.

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mfred68 avatar image mfred68 commented ·
Hmm, I did email Rahvol support, but they have not replied, and probably never will as they are in China.

My batteries are showing up as Pylontech in the vrm, so perhaps I could follow the Pylontech procedure? What ever that is, any help?

I was thinking of charging them individually to the point when the bms switches off from over charging, do each battery at a time, 6 in total, then once they are all fully charged, turn them all on at the same time in parallel. Could that work?

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nickdb avatar image nickdb ♦♦ mfred68 commented ·
Many Chinese batteries spoof the Pylon protocols so they can integrate with inverter manufacturers. The batteries however have unique requirements and can't be treated like the original manufacturer they are emulating. Sorry, ask the supplier, this is an unsupported battery.
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