That is 100% correct yes.
The SOC being at 85%, I auto increase it via HA during the day.
And because at 10am the first 2kw geyser comes on, it will charge some and then use some batteries, or not, depending on the solar irradiation, weather, at the time.
It sounds very much like @TheTerribleTriplet has inadvertently run the test I proposed then. And the problem resurfaced and from what you say reset 3% higher.
So regardless of whatever initiates the ESS#1 condition.
I am convinced that whatever the cause of the ESS#1 condition ( bad data whatever), the cure is to have the BMS set to be able to charge higher than the min SOC.
If it isn’t, the ESS~1 condition will be locked in.
@TheTerribleTriplet, I was thinking about this. You have set charging to stop at 95%, but that’s only a voltage level (3.45V). You have arbitrary told the BMS this = 95% and not to charge further than this.
So it is you that has said that 3.45V = 95%.
Now it probably does, but you know that not the BMS. The BMS only knows what you’ve told it. Why not tell the BMS that 3.45V = 100%? That way it will still charge past the min SOC of 95% and reset the ESS#1 condition.
Some more feedback … after I changed the SOC to be taken from the BMS last night, man I had drama, two things happened:
1) The system “lost” the Carlo again.
Reverting to Rel 2.73, did not work.
Unplugging the Carlo, reconnecting it, did not work.
Switching off the Cerbo, did not work.
Reinstalling the BMS driver, did not work.
In the end, I upgraded to 2.80~29, Carlo was picked up again.
FWIW, this started with the Cerbo, Venus never had this issue. BUT, it is not a Victron problem … unless someone else finds it too. IF that happens, history will show I got it first. 
2) Cannot use the BMV SOC anymore.
With the new version of the BMS driver and Release Candidate software, one cannot use the BMV SOC anymore. If I select the BMV as the source of the SOC, this happens as below, BMS Control - OFF… which makes perfect sense by the way:
YES!!! now THAT is a good idea!
I have been toying with same to set the BMS SOC at 100% on 3.45v, as cell full voltage currently is set at 3.5v - as a “test” to see if the cells run away again, to stop it there.
But because the cells are “better matched” ito resistance, the charge voltage is reached with no drama, steering well clear of 3.5v, so now I make the next adjustment.
Will change it to 3.45v, as this 17 cell bank seems to work, idling at 3.45v max, as it intended.
Read my post above yours. 100% correct what Plonk is seeing there.
So again, there is no problem here.
My boss gets upset when R&D time is wasted in such a manner. And then he usually counters it and says… we do want to be helpful, of course. Which is why I do it on a non-official forum… sometimes. But I really shouldn’t 
And at some point you also tend to become allergic to it…
Also, I must add: When you deal with people all over the world, there is definitely a likeness in how people of the same nation deal with things. Saffers tend to have a hard time formulating the problem, for example, instead trying many different things that are often not related to the problem, and sending this LONG report that you then have to filter through…
I absolutely feel your boss’s frustrations, as well as developer’s perspectives and frustrations.
And I agree on Saffers … as some of it stems from the fact that Saffers can explain things “differently”.
Phil made a few pennies drop for me. I have new things to try … probably going to solve the issue. If not, I will make a proper case for it on the official channel. 
Re the Carlo disappearing, have an idea on how to prove that it is, or not, the new Cerbo and/or Release Candidate, as I read a ton of things have changed the last few months. Will do that on the official channel.
@plonkster , if you want, delete all the posts derailing this thread. I think we have categorically made the case that it is not the 17/18 cell bank?
Pffft. I always feel like an idiot after acting out a bit. And after more contemplation, I figured that my big gripe with fellow saffers is also due to that trait we have: We want to be helpful. That is why we do a lot of little extra things, test different things, go to the effort of writing it all up. We’re trying to save the other guy some time
But I must tell you, I am coming over to the Dutch way of doing things. They will stop you halfway through a conversation and say: OK, that is clear. And it is implied that at this point you must stop talking. Sometimes less is more.
I like the Dutch way as I do it myself in my sphere of work like Ok, I get it … do the following exactly as I say, and let me know if it works.
Then the game is on … did I deduce it correctly, was I given all the info, or did I miss something salient.
I also have the patience to teach a newbie how to use SQL scripts, Stored Procedures, on their SQL Server IF they want to learn. Do that to either show them what is potting, or too help find the issue, or too explain matters better. Do it with easy-to-follow steps … like click here, press Enter … now select that Green Button …
And yes, I also get grumpy at times … we are all human.
Did the following:
Until @Phil.g00 , I missed the “picture” on 97% with 95% Min SOC set.
What further confused my “picture” was that it took nearly 3 hours to happen.
FYI on HA - panels are sufficient to recharge and power the house … I use batteries for evenings:
If SOC is 81%, make it 80% … if SOC is 86%, make it 85% … it works. First setting is 25%…
Do see the 3% hysteresis if I change on <81% >80% to 80%. Will go to 83% as designed.
Do see the 3% when it is 84%, batteries are used to 80%, it will use all for the batteries to get back to 83% if it cannot “power through it” with enough sun.
IF this works now, I will play with 95% SOC again, see if the 100% SOC sorts that out now once and for all in my world … or not. 
Ps. I LOVE IT when the Victron stops charge dead on 58.65v.
Pss. Smile even broader when the BMS brings the Delta down to sub 0.01v sitting at 100% SOC.
It’s good to get to the bottom of these things. @Plonkster 's input is invaluable as he knows what happens inside the black box. ( well, blue box).
Armed with that and some electrical theory and a dash of logic you should be able to figure most things out.
True story.
Had this client, me and them could NOT get on, not a chance. I was going to cancel their contract. Now the wife and I worked together, jip, she reported to me 8-5, 5-8 I reported to her, besides the point, she saw what was happening and asked if she can take them over. I explained to her what was what … she and the client got along like a house on fire. The reverse also happened, once, I took over a client of hers.
My point. We all have different ways of explaining concepts, the trick is to find the right way to answer people. Me, I think in “pictures” … and assuming one can draw … I will add the color once the penny dropped.
Some initial feedback:
95% SOC does NOT work. Stick to 90%. This is not a UPS.
I manually upped the SOC to 95% when SOC was on stuck on 100%. working as designed. Then the system had to use some batteries, down to 96%, and it got stuck there. Makes sense now, the 3%.
So in conclusion:
In MY case, don’t f…g do that, TTT, just don’t.
The system is a hybrid, not a UPS, give it some leeway to operate optimally.
See, I colored it in!
It is your right, nay duty, to question everything. Be wary of people that say stop asking questions.
– Me (2021 and forever)
I hope you feel we are worthy.
Absolutely!!!
And I see you pick up what I’m not saying. 
Ok, let me say what is not said.
When Plonskter speaks a LOT of people get it on the spot, as it is coming from a wealth of real-life knowledge, broader customers support knowledge coupled with his own experiences using the same products, direct access to even more experts like himself, all speaking the “same language”.
Then we add a teeny super important tibit of him being a developer on said equipment too.
Plonk is “Superman” on Victron, and he wants to help as much as he has time.
You cannot get more experience than that in my book, on top of all that, he is a really nice guy too, a real family man. We’ve met once.
And if he is blushing reading this … he is all that and more.
But here is MY problem, not his, MY problem - and why I skirted the issue a teeny bit:
Most of the time when he explains something to me, or to others, it is so far above my head that I just say yes ok, or read it with eyes glazed over.
Like whooosh … over my head. What, where, who … he wants me to do what with equipment … really? 
So the honest truth is I need someone to dumb it down for me, draw me a picture, of what Plonk is saying, just about most of the time. Realised that again when some pennies dropped on this thread.
Now and then I get it, as I understand, learn more, as now with the 95% thing, kinda.
Does that make me dumb and/or stupid? … I know one or two here will say yes … Bleh.
Thank you Plonkster for trying to help … we keep on missing each other. But that is on me, not you.
Well that was in reply to me. So I sat there wondering what to make of it, but the phlegmatic half of me decided to let it go. I was grumpy about having to go looking for a bug that wasn’t there, and being grumpy never comes across good even if it is justified (a little). So… I’ma get on with my life
There we go …
Ok, it is a “cheat”.
We braaied last night when there was a 6-8pm LS event.
And then a transformer blew somewhere in Northern Suburbs this morning.
But damn, it looks delicious.
Kettle, microwave, air fryer, induction plates all allowed if there is sun … with proper scheduling obviously, only have 4kw to work with over 2 households.
EDIT: There is no ETA on the repair of the substation, so if this takes days to happen, maybe I will get to a Zero Eskom usage on the graph and 'feel how that feels".
Always a silver lining if one wants to look for it … but damn, the drama this substation is going to cause, mother. We are not “used” to that in Cpt.
@TheTerribleTriplet You know where I stay got 680ah on tap if you need to charge. The other night I started the big H10.0 up with LS so that we keep going on what we need to do because it was a 18H00 to 20H00 LS. Wife was hitting it big time with loads. 3 hours later, 98.5% left of storage power.
Notes:
Happened last week again.
Was 100% happy on 100% SOC:
Then I saw this a while later:
I dropped the Min SOC to like 90%, it started again - the hysteresis I assume:
I will do it again using the BMV SOC, as the two seem to be in sync again, mostly.
Will test using BMV SOC, which cannot be done on the new Release Candidate, but can be changed on v2.73.
(***)
On the new Release Candidate, in my case, each time after an LS event the Carlo is “lost”. If I remove the BMS driver the Carlo works. Am happy to help test but trying to do “Alpha Testing”, a new Release Candidate AND a “new” BMS driver, can be a real peach, as it appears to be the driver?
Ag nee wat …
With BMS SOC used:
With BMV SOC used:
Happens instantly, if I manually up the Min SOC to 100%, from 90%.
Have no idea what I’m missing or doing wrong.
I give up … for now.
It has come to my attention that some may be losing faith in DIY banks, getting a bit worried reading about my plights.
I want to correct that.
First of all, I’m unlucky. Give me a Pylontech/BYD/FreedomWon/Revov bank and just “hold my beer” … I’m dead serious. What can go wrong will happen to me.
Secondly, I do push some limits. Limits are there,what does this setting do … so why not?
Thirdly it does happen that I come across interesting situations, that is no-ones fault, issues that could mean there is a potential dormant problem somewhere … or as is more the case, I have yet again simply missed that bloody memo!
And MOST importantly, I started with non-A grade non-batch matched cells with a BMS that was NOT suited for the intended purpose. REMEMBER THAT!
My point is, I’ve got a Masters Doctatorial Degree in WTF Not To Do(!), paid for in “blood, sweat, and tears with a ton of cursing thrown in for free”.
So I share my journey here for all so that we can laugh at the antics, I can 
at myself quite easily, to see what can go wrong, and what we collectively come up with to fix that for it is common things I stumble across. As DIY’ers, it is a journey of learning and having fun… with swearing at the right moments.
So people, do NOT give up on DIY banks … they WORK, as @Gman and many others can attest too.
So enjoy my antics … as much as I do. 
… and do NOT give up!
TTT, this is the fun of Solar and electrical DIY stuff, you blow up things, you make white magic smoke, you spend money, spend hours with stuff try to figure out, but most important thing is, you learn on the way doing stuff and you can share it with others.
