It has happened a few more times, but solar charging and the method above seems to revive it. I had charged it up to 77% and it fully discharged at one point. When I revived it again, it immediately went to 77% and charged up from there (really only taking 23% charge and showing 100%) It crashed again when it went down to 77%. Did the solar only 12v charging and it appears to be working a bit better now. The trick is to not let it fully discharge, but I think with the bluetooth and other bells and whistles on this unit, it seems to have less standby.
The same thing happened to me just a few days ago. Both the App and the display indicated the battery at 100% and it would not charge - unit was totally dead unless I used the AC input cable. I found a forum where someone suggested connecting a laptop charger to the solar input as well as using the AC charging port. I connected both and nothing happened. The app showed green for grid power and green for DC input but still no charge. I just left them connected and about an hour later, I heard the fan in the EB3A. I checked and it started accepting charge from both DC and AC. The state of charge displayed 99% and it accepted 267W! Yay! I fully discharged again - same problem with same solution. Error A006 - needs a firrmware update. Don’t fully discharge.
Hi, I’m going to give some advise on helping get these back working right. First off LFP batteries like Li-ON can get out of balance with each other. I think that may be part of the start of the calibration issue as the un balancing get worse the BMS cant keep up. One thing Bluetti should also be telling you during the re calibrate process is to keep the AC plug in for at least 2 days after the recharge, (100%) !!! You will notice that as the BMS starts to top balance the cells it will come on and run for 2-3 minutes and shut off. Then start charging again and shut off. It will do this every 30 to 45 minutes and eventually slow down as the cells balance out. There is nothing wrong with it doing this and it all part of the charging process. Also do not leave anything plugged into the unit while charging. When its really done and finished you will know because the top of the unit will be cool. And do realize that you may have to do a discharge/recharge cycle twice to get a good re calibration depending how badly the cells were out of balance. Its good practice to keep the AC plugged in for 24 hrs during each recharge cycle with AC and DC off to keep the cells in balance.
It is a major design flaw. It seems like a LOT of people experience this. It does not look like any update is going to fix this issue that may have to do with balancing the charge on cells. I’ve dealt with this multiple times, and overall capacity is fine, but it does not seem the charging system is smart enough to not brick the entire thing on a discharge cycle, which is what it has done in my case. Very disappointing.