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Andreas Jaunsen avatar image
Andreas Jaunsen asked

BMS and HE Li-ion capacity messed up after updates

Hi recently returned to the boat which had been on shore for past 10 months (not connected to power). 2x Li-ion HE Batteries (2x200Ah) seemed okey so started updating all systems (Venus GX, multiplus, mppt, BMS400 etc).


I notice in the past week that the battery level seems to be wrong. I reset consumption stats but still at about SOC 60-65%, voltage will be <24.5v indicating it is much closer to empty.

At this 65% SOC level the multiplus also turns off by itself and no longer inverts... again suggesting SOC is wrong!

I am not getting multiple low cell voltages and have no idea how to solve this?!!

MultiPlus Quattro Inverter ChargerBMS
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mvader (Victron Energy) avatar image
mvader (Victron Energy) answered ·

Hi, best (and only for most battery monitors, probably also the HE batts + Lynx) way to sync the calculated SOC with the actual physical state of charge is to fully charge the battery.

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Mark avatar image Mark commented ·

Sorry to jump on to this ....but the synchronisation button on the Lynx Ve-Can shunt doesn’t work!

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mvader (Victron Energy) avatar image mvader (Victron Energy) ♦♦ Mark commented ·

Hi Mark, ok I’ll look into that.

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mvader (Victron Energy) avatar image mvader (Victron Energy) ♦♦ mvader (Victron Energy) ♦♦ commented ·

But pls make a new question, preferably include venus os version, lynx shunt version, and a screenshot of how you’re trying to change it - I think I know how but just to be sure.

Thank you!

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