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[DonTom]

> ... This jumpiness is at any percentage of SOC when the OBC is on.
> I wish I knew why, but I could not find a clue.

Even when cold?  I'm thinking it could be thermal...?

It jumps every half second or so. No matter when you check the OBC. It jumps so fast that it is difficult to get a reading. But the external chargers are rock steady as long as the OBC is not being used.

-Don-  Reno, NV

[MostlyBonkers]

I’ve just remembered... when I was monitoring the battery via Zero’s app, I noticed the cell balance going haywire.  I think that cells that have gone bad are likely to go out of balance much quicker than good cells. I hope your logs shine some light on this and that your local dealer can help to diagnose the issue.  Push for a battery replacement under warranty and if they refuse, demand a thorough explanation as to why and share the technical details with us here.

Good luck! :-)

[togo]

I’ve just remembered... when I was monitoring the battery via Zero’s app, I noticed the cell balance going haywire.  I think that cells that have gone bad are likely to go out of balance much quicker than good cells. I hope your logs shine some light on this and that your local dealer can help to diagnose the issue.  Push for a battery replacement under warranty and if they refuse, demand a thorough explanation as to why and share the technical details with us here.

Good luck! :-)

Oh, maybe you were observing normal battery balancing.

[MostlyBonkers]

I recall the cell balance, or imbalance, jumping up to 144 mV after riding a short distance.  It would reduce to more normal levels when the bike was stopped.  Another indication of bad cells, I would think.

[togo]

Or spotty connection to good cells.  A connection that opens or condensation/moving water.  Any indication of water ingress?  Do you park outside uncovered?