Das Kalibrieren bringt bei mir leider nur sehr kurzzeitig eine Verbesserung.
Schon nach wenigen Tagen ist die Ladestandsanzeige der B230 leider wieder komplett falsch und
an der AC200MAX wird “0%” angezeigt und die B230 geht wieder aus obwohl sie geladen ist.
Auf der AC200MAX ist eine sehr alte BMS Version 1017.03
Bitte geben Sie für meine AC200MAX die neueste BMS Version frei, ist das die BMS 1017.07 oder gibt es bereits eine noch neuere Version ?
EU - German Version
Ser Nr. 2219000202312
DSP 4005.08
ARM 4008.03
BMS 1017.03
HWI 6037.03
this is a english forum, would be great if you can also write your articles in english.
I see that you have the same problem as the mentioned article, which resolve this issue by upgrading to BMS v1017.07. @BLUETTI_CARE Can you push this update to this AC200Max Unit?
Hi @Max2, We apologize for the delayed response due to the holiday.
We have applied to upgrade your BMS, our IT department will push the latest version of firmware to your machine in 24 hours. Please upgrade it tomorrow.
Please disconnect the B230 from the AC200MAX, and do not load any device when upgrading it.
After that, please try to do a complete cycle of discharge and charge to correct the SOC. The problem will be resolved.
Please follow the steps below to recalibrate it:
Please discharge all the power (charge AC & DC appliances with the power station) until the SOC is 0%, turn off the machine, and leave it for 3 hours till it cools down.
Please charge it again, please do not load any device when charging it, and do not interrupt it while in charge.
You can click this link for reference.
Please let us know if it does help.
Thank you to @Selfmadestrom for the detailed answer and guidance, it was very helpful.
The update is installed.
A question about the"recalibrate instruction"
“discharge all the power until the SOC is 0%, turn off the machine”
During discharging the DC and/or AC output musst be activated.
When recharging is startet, the outputs are initially off.
But after some time of recharging, the outputs are automatically reactivated.
How could automatic reactivation of the Output be avoided?
Because this contradicts the instructions, at least temporarily:
thanks.
I have performed the recalibrate according to your instructions.
The problem is not solved but has changed.
According to my observation, the problem occurs because the B230 is not automatically switched on with the AC200MAX.
If the AC200MAX is then charged or discharged while the B230 is off, an incorrect SOC value is displayed after switching on.
With the old BMS version, a value that is significantly too low was displayed.
E.g. switching off the B230 at 60%, without discharging after switching on 0%
With the new BMS version, the SOC value is now sometimes displayed as being significantly too high.
Today, I switched off the B230 at 36%, and without charging, it was at 94% after switching on.
Hi @Max2, Thank you for the update. We would like to gather more information.
Are you located in Germany? We would like to know the specific environmental temperature where your AC200MAX + B230 devices are being used, as low temperatures may affect battery performance.
Additionally, is this AC200MAX + B230 set used regularly? Has it been stored for a long time without use? This is not ideal for battery maintenance, and we recommend that customers use the device regularly.
It seems like you have been keeping the AC200MAX and B230 connected together. Given the current SOC issue with the B230, we recommend disconnecting the units and recalibrating the B230 individually. Does that help?
Yes, the B230 does not automatically turn on with the AC200MAX. Please ensure that the B230 is powered on and turned on before you power up the AC200MAX. We have added an activation function for the battery pack in newer models like the AC300 and AC500.
The temperature is between 16° and 20° celsius all the year
Additionally, is this AC200MAX + B230 set used regularly?
Yes , AC200MAX and B230 are connected together because I only need AC Power and are charged via two solar modules.
Depending on the sun, charging takes place almost daily, and AC consumers are used about 2-3 times a week.
we recommend disconnecting the units and recalibrating the B230 individually
For the recalibration I had already disconnect the B230 and fully charged.
On the first day after the recalibration the SOC display was correct.
At night after a few hours of inactivity, AC200MAX + B230 go’s off.
Next morning, when the energy comes from the solar modules, the AC200max switches on automatically.
Unfortunately, I can only activate the B230 manually, usually at a later time.
Already on the second day, when the charge level has become different, an incorrect SOC is displayed for the B230.
I hope this helps you to find a solution to the problem.
Just a related tip: to prevent the b230 from turning off, simply press the “dc output” button on your b230 (the green LED on the button will light up). You don’t need to attach any device to the usb ports of your b230. As long as the button is on, your b230 will not turn off and you don’t need to turn it on every morning for solar charging via your ac200max.
Hi @Max2, Thank you for providing the information. We can rule out the impact of ambient temperature now.
We believe the new firmware has indeed optimized the SOC difference between the AC200MAX and B230, preventing the B230 from discharging too quickly and dropping to 0%, making it unusable.
Please note that even without an external power source, the AC200MAX and B230 will charge each other to maintain SOC balance.
However, the SOC change seems to be happening a bit too quickly. Therefore, we would like to know if your AC200MAX is connected to only one B230 battery or if there are additional battery packs. If there are other battery packs, what are their respective charge levels? Has the AC200MAX’s charge level changed after restarting?
If possible, please take a video, upload it to Google Drive, and share the link with us. That would be really helpful.
We also appreciate the experience shared by @Snips1, it has been very helpful.
Yes, that was a worst case scenario and hopefully it won’t happen again with the new firmware.
But the SOC display still has a large deviation, which significantly limits the use and application for some consumers.
Please note that even without an external power source, the AC200MAX and B230 will charge each other to maintain SOC balance.
Yes, that is a useful function and I have already noticed it.
Should the charging indicator on the B230 flash during this?
Does this function also work if the B230 is connected but switched off?
But the B230 should never get more SOC than the AC200MAX?
The SOC display was/is still wrong for me and should be improved further.
However, the SOC change seems to be happening a bit too quickly.
yes
Therefore, we would like to know if your AC200MAX is connected to only one B230 battery or if there are additional battery packs.
no, the AC200MAX is only connected one B230
Has the AC200MAX’s charge level changed after restarting?
I have to observe that first
to do that I have to anticipate the automatic activation.
thanks to BLUETTI_CARE, Selfmadestrom and Snips1, these are already some new insights
“Please note that even without an external power source, the AC200MAX and B230 will charge each other to maintain SOC balance.”
.
I have never noticed that the three batteries
(AC200MAX and 2xB230) automatically adjust to the SOC.
I continued to monitor the SOC display over the weekend.
But please also answer the questions from my last post.
The AC200MAX and B230 were connected and turned on, there was no charge or discharge.
The following SOC was displayed in the morning
AC200MAX 25% and B230 27%
the AC200MAX and B230 will charge each other to maintain SOC balance.
With this feature I would have expected the same SOC of 26% at the end of the day
But there were SOCs
AC200MAX 29% and B230 19%
the AC200MAX and B230 will charge each other to maintain SOC balance.
I suspect the function is based on the voltage of the battery and not the SOC and shows that the SOC is still clearly incorrect ?
1.It is normal for the SOC of each battery pack to be different, because the battery voltage between the packs may be different, in the case of parallel connection with different DC voltage, when discharging, the battery pack with higher voltage discharges more, and the SOC drops faster; when charging, the battery pack with lower voltage charges more current, and the SOC rises faster; even if there is a difference in the power, in the end, it will still be fully charged to 100% or discharged to 0%.
2.Battery packs will charge each other, high voltage battery packs will charge the low voltage battery packs until all the battery packs have almost the same voltage, but this does not mean that all the battery packs are the same, because the battery life of each battery pack is not the same, the battery voltage and the battery life is related to the voltage of the different battery packs of the 0% and 100% of the calibrated voltage is also not the same.
Ich hatte das gleiche Problem. Habe voll kalibriert, Problem trat wieder auf. Habe dann die Firmware aktualisiert. Danach zeigte das Gerät sofort 100% an.
