Strange permanent offset between SoC and predicted SoC

I think I enabled Battery Balancing for one day, and since then my forecasted battery level has displayed a strange offset in the beta VRM. The algorithm seems to ignore it and continue with what it would do before. I’ve tried switching things, but the offset always comes back. It looks ok on the regular non-beta VRM.
Beta:

Regular:

Hmm, now this evening the regular vrm is also showing the offset/step

I appear to have a similar issue. My battery SOC forecast is showing a permanent 100% for today and tomorrow.

I have the SOC set at 20%

I have rebooted, toggled DESS on/off and tried varying SOC, all to no avail.


@seimon Did your system correct itself?

My system remains stuck with this offset. I have tried flashing new (beta) firmware and that didn’t make any difference so I flashed it back.

The system is not responding to the offset curve - if it were it would now be importing power from the Grid.

Perhaps someone from Victron could have a peep at my system:

https://vrm.victronenergy.com/installation/470243/share/060ab908

No, mine is still stuck like similar

My plan is to wait for a day with cheaper pricing and try enabling the Battery Balancing again, my random theory is it might reset itself if it can catch up to the forecast line :man_shrugging:

I did charge mine to 100% hoping, like you, that it would reconnect. But alas no.

I have now added a link to my system in the post above.

Now that prices are relatively high the system has started charging - without the battery curve I have no way of understanding why. I have adjusted the SOC down to 10% from 35%, expecting that to make it stop charging, but it has made no difference.

I can now adjust my target SOC from 40% down to 10% and the system just sends power from Grid to the load. It does not try to charge or draw from the battery.

I feel like I am completely rudderless in the fog and don’t know where I am heading.

In complete frustration I have switched battery balancing on for tomorrow - now deferred to Wednesday (sunny) due to strangely high Agile prices.

My system is now completing battery balancing and is starting to discharge. It will be interesting to see if the lines diverge again. You can watch live on the link above.



I have added further comments to this post as no more than 3 replies are allowed:

Carrying out battery balancing has not rectified the issue. I am left with a battery forecast line showing 100% and have no idea how my DESS system is performing against the target SOC.

Can anyone from Victron shed some light on what is going wrong here? Do I need to completely reset the system and start over again? If that is the case how do I do it?

@seimon Are you on system number 470243 as shown on your VRM URL?

Number

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Hmm, bugger.

Not sure what you’re asking me - that’s your id isn’t it?

Not sure if @Barbara can help us with this?

@seimon I have seen on other Victron posts that the number highlighted is a group number and software can be amended by Victron for that entire group. It is a different number to your Victron Portal ID, which is specific to you.

I was making a crude attempt to establish if a Group of us on that particular number were the only ones affected.

That doesn’t sound right to me. But either way, my number is different!

@seimon This is the post that I was referring to: DESS: Consumption forecast far too high due to one-off higher consumption - #16 by dfaber

You will see these references:


Nothing nefarious planned on my side :slight_smile:

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Hi,

So this bug is caused because your forecasted SoC is calculated per half hour, what the graph does (wrong) is adding the two forecasted SoC values and showing that. So your forecasted SoC for 2 PM is 54% and for 2:30 PM it is 56%; the graph tries to plot 110% but is capped on 100%.

We will fix it asap for you. Thank you for finding and reporting this!

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Thank you @Barbara for coming back to us, it is much appreciated. :slightly_smiling_face:

Super, thanks for the update. It makes sense on my graph too, I have a lower minSoC than @teejay, so mine rarely adds up to over 100%, I can halve it and it seems to match follow the current trend line! Cheers :smiley:

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Hi @teejay and @seimon , the fix for this is now live!

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Thank you so much @Barbara you have fixed it and all is working well again :grinning: :grinning:
And thanks to @seimon for posting the issue.

I love the fact that we are able to get in direct contact with Victron staff and get a response. There are not many products where you can do that.

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Looking good on my setup too, thanks very much.