I am using Victron Smart Lithium Batteries, and I have noticed that charging does not start when the battery temperature is 8°C, even though the manufacturer specifies a lower limit of 5°C. However, charging begins as soon as the temperature exceeds 9°C.
I have been working with this setup for over two years and consider myself an experienced user. It seems to me, without being able to fully confirm, that the issue started when I upgraded to the new Beta version.
Note:The system does not display any alarms, and all indicators appear normal.
I am looking forward to any guidance or insights from the community!
Have you reverted to an official version of the firmware / rolled back to the previous version to validate your theory? Does the temperature match the one when you access the battery via VictronConnect?
I have not reverted to the previous firmware version, nor do I claim that the issue originates from there. I am merely making an assumption without concrete evidence. Besides, I can’t imagine myself going back to that chaos! **
Regarding the temperature readings, I have checked the values via VRM since I am away from the boat during the winter , and they appear to be consistent with the measurements from the BMV-712 Smart sensor.
I am attaching some recent snapshots that might be helpful.
What matters is the temperature inside of the batteries.
Unfortunately you can’t read them from remote.
I think you could go to the remote console → device list → MultiPlus → VE.Bus BMS
There you should see if charging/discharging is allowed from the BMS.
You are absolutely right; the critical temperature is the one measured internally by the battery’s BMS, and unfortunately, we cannot read it remotely. This explains why charging remains disabled, even though the temperature everywhere seems sufficient.
Thank you very much for your guidance and support!
@Constantinos
In your case, is there an option in DVCC STS to change the ‘system’ T to be sourced from the BMS? You have it set to ‘Automatic’ now.
This issue also exists with Pylontech batteries, but the interface there has STS Forced Off and there’s no option there at all. Both NewUI and VRM Dashboard pick up something else in their battery tiles. Been reported higher up as a bug, but I have no idea if it will get fixed.
Rolling back or going with the latest release as opposed to beta firmware is very easy and would have been an interesting test of the theory. Regardless as others pointed out internal battery / cell temperatures are the important ones used by the bms. If you drill down into the ve.bus bms section of the inverter it will show the status e.g. allow to cherge / discharge.
I understand what you mean, and it was the first thing I checked before submitting my question. However, no matter what I selected, the result remained the same.
I believe that @Matthias Lange correctly identified the issue. When I installed the two batteries in parallel, I noticed through the application that they displayed a temperature difference, but I did not adjust the Battery Temperature Offset setting because I couldn’t determine which one was showing the correct value.
Moreover, in central Greece, where I am located, temperatures rarely drop that low.
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, and they appear to be consistent with the measurements from the BMV-712 Smart sensor.
