I’ve been experiencing a phenomenon for a few days where the SOC (State of Charge) suddenly jumps back to 100% at night. I can’t really identify what’s causing this. I’ve checked all the connections of the block modules. What can I do to isolate the problem? My system had been running smoothly for about 4 years before this.
No one has any idea?
Hello @Breakyman , as discussed elsewhere, I only know of two situations where SOC is reset to 100%:
- in Hardware > Shunt settings you enter the capacity of the pack. There you also see the first Recalibrate SOC-reset setting. Once your charge flows over 101,5%, SOC will be reset to 100%
- final SOC calibration is done based on minimal Bypass value/session for all cells under Control-Logic > Charging. This means ALL cells need to reach a certain bypass value before SOC is reset to 100%. Actual bypass voltage is found in Hardware>Cellmon. This means, if you have one misbehaving cell (or bad connection), you will never enter the Bypass Complete phase. Monitoring of the bypass value per cell is found under Telemetry>Cell-Info
I must admit your situation seems to be different.
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Thank you for your comments. I checked all connections again and found no errors. The bypass is also carried out cleanly. It doesn’t happen when charging but at night when little power is consumed, then it just goes to 100%.
Also Cell Info everything is clean:
I don’t know where else you can look to find errors?
I’m sure @James has an idea what could be happening here!
I have the same issue. It jumps back to 100% while discharging, so no Re-calibration should happen. Sometimes it’s from 90% to 100%, sometimes even as far as from 70% to 100%. Happens almost every night:
Well, the problem occurred after I expanded my battery from 2 blocks (32 cells) to 3 blocks (48 cells). I couldn’t really solve the problem here. All connections were checked and also software New installations brought no changes!
Only when I put my 4 block (64 cells) into operation did the problem disappear! Now it’s been approx. 2 months again perfect, as with the first 2 blocks over 2 years without problems. Maybe a problem with Blockmons and 48 cells. It must be a software calculation error because only the SOC is jumped…
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I went back to an older version: 2.17.55
no error for 7 days since then
@cotje
Sorry this took me so long to see, we’ve been under the pump a lot this year developing new hardware to add to existing systems.
You’re dead right, at the time of writing we only have those two reset methods.
@Breakyman
One thing that can mess up our system is an incorrect clock, as if we think it’s midnight when its not.
Also check your software version, if you’re older than 2.17.55 you should update.
Hi, I have from what I read a similar issue with my 15kWh LiFePO4 Solar setup with a Goodwe GW-5048D-ES. At irregular interval (1-9 days) the SOC will reset to 100% during discharging. I checked/cleaned every connection, reboot etc. but no change. I’m on 2.17.57. First occurrence Oct. 27th and has since then happened 15 times. Most are a singe back to 100% reset, some are multiple resets closes together.
I have some observations:
- It only happens after 100% charge was reached, never happens at lower SOC peaks.
- It only happens on the discharge cycle (in full darkness)
- Clock is set correctly
- No changes to the system (4 years in operation), only changes is software updates
- Disabling re-calibrate Hi, Low and bypass SOC has no effect on this issue
This is an example of a single reset at 21:44 (Full dark in Thailand) at SOC of 71%.
On a reset my batteries will drain to the low cut-out then then never charge full again unless I reset the SOC manual. If anybody has any suggestions or if I can provide specific data let me know, whas hoping the issue would go away but doesn’t seem like it.
This is an example of a multiple, first one at 20:26 @ SOC 86%, then 22:53 @ SOC 89% and finally23:16 @ SOC 98%
Hi Mario,
Please PM me your WatchMon Serial Number after making sure your device is provisioned.
I’d like to log the stats of your device and see if we can work out why this is happening.
Cheers,
James
Hi James,
Thanks for your reply, all setup and I’ve PM the serial. Hope you see something in the data.
Best regards,
Mario
Hi Everyone,
I’ve taken a look at our inner workings and Mario’s system, and can confirm these are the only two reasons SoC% will be reset to 100% from below (i.e. not the 101.5% mentioned above):
- If all cells are bypassing at a rate above Bypass Final CA2 (defaults to 300mA) or
- All of these conditions are met:
a. All cells have balanced by at least 50mAh (set by CA3) AND
b. at least one cell is currently balancing AND
c. either a cell is over CV9 or the cells are flat (below delta configured in Auto Level settings)
Now, in the event I can see in the data we have in our logs, all cells have reached CA3 during a reset, but balancing shouldn’t have been occurring.
Did you manage to catch what else was happening to the system at the time? A charge current spike that pushed the cell voltages up for some reason?
Hi,
Was traveling but when I was not at home there was an event under almost ideal circumstances as follows:
At 20:55 Thai time when it’s full dark the SOC resets to 100%.
As the load is constant the voltage is flat.
The current is constant, not loads are switching.
The only thing that I see is that the Chg. Target is 0.00A at the time of the event while it is normally as above 100.00A when I go back a few minutes.
The current/voltage of the battery is absolutely flat as I was not home and the load is stable, so I assume it’s not triggering as SOC change from that.
The only external event I see is that it looks like my Goodwe GW5048D-ES stops sending the chg. Target or the Batrium stops decoding it, however I think it’s unlikely the SOC would reset on this info but it’s the only thing I get get from the data and I will monitor if this is a recurring pattern.
Best regards,
Mario