I’m using a JK BMS which uses float voltage and three Multiplusses 8000VA. When the charge voltage of 55.2V is reached for an hour it will go to float voltage of 53.6V. When it does that, the inverters will discharge at maximum power and it ignores the maximum discharge power set in remote console u…

Your right. Just watched on the phone, thought bottom right is the DCPV box. Then, it is even stranger. AC PV is usually running pretty much on it’s own.

Maybe I don’t understand you well, but I don’t have dc coupled pv, only ac coupled pv (ac-out) It seems to me a real structural problem in DESS. When DESS is off, everything (change in CVL) goes as expected. It has nothing to do with DC PV. (I don’t have) Also at the moment that the CVL → float …

[image] [image] I think this is why the SolarEdge shut down. (which is good in itself) (unexpected discharge to grid (because CVL (55.2->55.0)) + PV power > 16kW) I have also a power limit 90% in the SolarEdge. (max 15.3kW instead of 17kW). All settings/limits are pretty conservative.

Just sharing some findings and thinking a bit loud - hope you don’t mind :wink: By the time you made the first video (14:05, with DESS enabled), DESS was in Scheduled Self-Consume mode. That is, it is doing nothing (!) but regular ESS-Mode operating on the grid-setpoint. Generally DESS has no cont…

The different voltages seem strange to me. Between 13:00 and 18:00 the soc is 100%. There is then no or little current in the dc cables.(battery idle) Even with a bad connection (which I think is not the case) if there is little current flowing, then there can also be no voltage difference. I have c…

[image] dognose: By the time you made the first video (14:05, with DESS enabled), DESS was in Scheduled Self-Consume mode. That is, it is doing nothing (!) but regular ESS-Mode operating on the grid-setpoint. Which makes it extra strange that there is a difference with DESS on or off… With D…

You’re definitely not the only one. Me and many others in a Telegram community with Victron users experience the same weird behavior. This is not OK and can blow main grid fuses and can cause dangerous situations where you select cable and fuse sizes and it just ignores the limits you’ve set to com…

who dares to try float 48V… :grinning_face:

I think the results will be the same. The inverters will invert at maximum power. It is doing it now till 53.6V and will be doing it till 48V. It will discharge just longer at maximum capabilities. Nevertheless it is not nice for the LFP battery cells! In my situation with 3 batteries it is drawing…

Ignores discharge power to float voltage

Q&A and troubleshooting DESS

idobuiter (Ido Buiter) 11 June 2025 19:20 40

Solaredge is controlled by Venus OS (vrm logging was on 15min, I think that is the cause you see nothing in the vrm log, even when I set to 1 min log, you probably not see it)

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Ignores discharge power to float voltage

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