As the title suggests I have an AC500 with 4xB300S that has stopped charging after an update of the AC500. I do have another AC500 with a B300K that works fine. If I interchange the batts either singly or in bulk across the AC500s I get an A035 low temp error when there’s a B300S in circuit. No charging takes place after the update, by any method. The temperatures are the same as they’ve been for ages.
This is clearly a software issue due to poor regression testing, when am I likely to receive an update to fix this problem? Urgent!!!
Hi @GregP, We really want to help you.
Could you let us know which firmware you specifically upgraded to?
Please provide your AC500’s SN code and the current firmware version, and we will try to resolve the issue with the new firmware.
I am still awaiting a resolution to this issue and I have given you the information you asked for. You’ve sent me an email saying you haven’t heard from me for 3 days so you are going to close this ticket??? Your forum states 2 days as I’m typing now. It’s the weekend in the UK and businesses don’t usually work the weekend.
The support is obviously based in China, that is why I can only get a response once a day. Not good enough for my business.
What is going on with you guys???
Please put this thread on the public forum as others can see the level of support they can expect.
This is the public forum. Everyone can read this. Sometimes it helps to ping Bluetti Support or Bluetti Admin again as they sometimes miss to read (updates on) threads.
As QuickFox noted, the other thing that can help with communicating is to include “@BLUETTI_CARE” (without the quotes) in any message you send to them. You’ll notice their msg to you included “@GregP”. I suspect they use a bot or some software that pulls up msgs that have their ID embedded within which may increase the probability of them seeing it in a timely manner. Just a thought.
Hi @GregP, Due to the weekend holiday and not be mentioned, I did not find your message in time.
We have now applied to push the new BMS firmware to your AC500. Our IT department will complete the push within 24 hours. Please proceed with the upgrade tomorrow.
We recommend upgrading the BMS version of all B300S batteries to the latest version. Please ensure that only one B300S battery is connected at a time for the upgrade. During the upgrade process, ensure no loads are connected.
Please let us know if it does help.
Thank you to @TheQuickFox and @TMan for their answers. Yes, please mention @BLUETTI_CARE so that we can see your messages promptly.
I’ve completed the upgrade on 2 of the 4 B300Ss. I will need to get help to move the stack with one as it’s on the bottom of the stack and the cable is not long enough to charge it. I’ll let you know about that one later.
One B300S is almost dead. When I connect it to the AC500 the AC500 reports it is completely drained. It will not charge from any source: AC500, PV, T500 or a direct DC input. It stops the AC500 from functioning as it’s dead. What can I do about this one?
Hi @GregP, Thank you for your update. We have indeed received your email. I have shared all the information regarding this case with our email support team.
When the B300S is running low on power, please disconnect it from the AC500 and charge the B300S separately. Does this help? If AC charging is ineffective, please try charging via PV. Ensure that the open-circuit voltage of the solar panel connected to the B300S is between 12-60V.
Our email support team will also follow up on this matter.
Hi @GregP, Thank you for getting back to us so quickly.
I appreciate your kind understanding and patience. We expect your test result.
Please feel free to contact us if you need our help.
@BLUETTI_CARE It looks like the 3xB300S are now working correctly with no alarms and charging enabled after you pushed the firmware upgrades. This is from fully discharged. However, the AC500 is only charging at 1.2KW instead of 2.2KW it was pushing out previously, before any upgrades. This with grid input current set to 10 or 13A, grid adaption on or off, standard UPS mode. The same is happening with my other AC500 with one B300K. This is too slow and the UPS will loose charge if the load is above 1.2KW and would flatten quite quickly if the load is 3-4KW, defeating the point of a UPS. There was no load on the UPSs.
As for the last B300S, it was charged yesterday standalone on PV but is as dead as it ever was, the green power light flashes when there is PV power available but no charging lights are on. When connected to the AC500 with the B300K the capacity goes to zero on the AC500, it ignores the B300K, and the AC500 and B300S power lights flash.