Dear community I have built and installed quite a few eve mb31 batteries ( 48V, 314 Ah) . I have an issue that I have never seen and would like to see if anybody else had the same.. Installation : 12 X 605 watt bifaial, multiplus ii 8000, mppt 250/100 and 150/45 , automatic generator start stop t…

I found this thread: Multiplus jumps from charge to discharge - VictronEnergy Is there a way to PM this user or is this user on this new forum site?

There is no way to PM on this site. Not sure if the user is even on here. Accounts weren’t transfered.

How is your system programmed otherwise? Since you are offgrid the charging and discharging is likely related to pv not covering loads and system consumption/losses. The thread you linked was an ESS system. So not likely related to your use case. The vrm can be a bit laggy so not the best way to …

it is definitely not the case of PV not covering loads. I have plenty of PV. there is something else happening that I’m not understanding. It is as if the battery gets slightly overcharged, then has to discharge itself. but none of the math of the remote console makes sense. System is programmed li…

I have a 2 x JK systems at home. So it is interesting. Am abs and float are 56.2v and 55.5 though. The voltages you are using are more like the ones i see on second life cells. Take of STS to start though. And how is the inverter (and mppts) programmed?

ok, i have it figured out. the issue was a poorly calibrated JK BMS. It was off by 0.2V, enough to throw everything off. I did proceed to install a smartshunt and took the decision to never install without a smartshunt again. Both for lower amp readings and being able to use the Victron MPPT’s inste…

JK and 6 packs, same problem. The solution was just to disable float on all BMSs

The same problem here. I tried to disable float from bms and I get the same result… [image] Jk V19 bms problems DIY Hello all I built a DIY battery with Eve MB31 cells and Jk bms V19. Everything works correctly (connect VE can bms without packet loss, bms is …

Jk BMS jumping charging discharging

Modifications

Justme 10 August 2025 11:03 9

The same problem here. I tried to disable float from bms and I get the same result…

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Jk BMS jumping charging discharging

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