The Bluetti AC500 and B300S has PROBLEMS! Constant Power Output From B300S.... Not Cool! 

Watching for Bluetti response. I have same units. Mine work perfectly. Good luck.

Thanks for sharing and letting me know NOT to buy the AC500 and look for another power station.

Interesting, I’m looking at that same setup for myself and definitely will be watching for Bluetti’s response. From everything I’ve seen about the company, they seem to have a good reputation and follow through with their products....we’ll see

I know others have already mentioned this, but have you tried the cable arrangement shown on the Indiegogo site? Bottom battery to top battery, then to the AC500? It might be worth a try.

I just got my ac500 and b300s battery. Having the same problem. I got a 2nd battery today and tested it and the unit turned on and off normal. I even tested the old cable from the first battery I got. It worked fine. Its definitely the battery giving constant power causing bms errors. Will be contacting bluetti today. The joys of troubleshooting. 🙉🙈

Received my AC500 and B300S. However the AC500 ac switch is not turning unit on. Unable to get response from Bluetti. Customer service stinks.

Have fun finding customer service.

Suggestion. If you want to Demonstrate or test this anymore I suggest plugging into the AC 500 1st and then into the batteries so that if they are arcing it’s arcing on the battery not your AC 500 unit.

Wait a minute so if you get a 3rd battery (b300s), where would you plug it into the AC500 ? There isn’t a 3rd port, is the wiring diagram wrong and you have them connected wrong … shouldn’t they be connected piggy backed to one another ?

I have a AC500 with 2x B300S batteries. I got the 2nd battery about a few weeks after the first battery and the AC500. Before the 2nd battery arrived, I had the units connected to two solar panels to charge it up during the day and run lights at night. After 1 week I noticed that the lights were not on and the battery was not discharged had about 70%. I've not heard arking on mine but I had errors that I can not clear. It thinks there is power going to it from the solar even though nothing is connected. I have called and can't get through, can't leave a voicemail, I emailed and I got a message asking for more info and I've heard nothing back since, I've messaged them twice for more info. Over 10 days and heard nothing. I feel like I've sunk a lot of money into Bluetti devices and I'm waiting for help from them too.

Hey what's up, one question have you try to switch cables? If it does the same then is the BMS battery, if it doesn't then it's the cable, that's why is so tight, give it a try.

Does the same thing happen if you plug the possibly faulty battery into the top port on it's own? Also did you try the suggestion (made by "what's up with Cori?") to daisy chain them - see the instructions for the AC300

I turned off my AC control on screen, then turned off AC500. Overcast, no solar charging battery, batteries are dead. I plugged the AC cord into wall outlet and attached cord to AC500.. Problem: I cannot get the AC500 to turn on, so I can turn on the AC. This has not been an easy product to understand. I am not a very "techy" person, so having issues with Bluetti.

The footprint added by those poorly placed cables seems like a giant oversight to me.

did you try switching the batteries around.

did you try switch the cables ?

If you look at the photos on their indigogo site, all I see is daisy chained batteries, I don't see a setup like you are doing them. Although, you would think either way should work

I did konda expect this from Bluetti, almost all their power stations have problems from the BMS to overheating.

For all of you contemplating spending 4 or 5 thousand on a Bluetti…buyer be ware. I have an older EB 150 which is now four months out of warranty and won’t charge. Good luck getting service for an out of warranty Bluetti. Max Oak, the company that originally marketed Bluetti, told me if it’s out of warranty they have no interest in helping me. Google out of warranty Bluetti repair. Apparently that’s a secret. Contacted Bluetti several weeks ago and nothing. I now have a thousand dollar boat anchor.

I thought the batteries daisy chained on those maybe that was the old one.

Second line of the error messages, the battery is drained. Try AC charging the second battery then try again.

I have the same exact setup and I do not have this problem. I turn the main unit on and both B300 batteries turn on.

*Faulty Cable ?*

My connection to the bad battery is also very tight like in the video. Almost imposible to put the plug in. You are not going crazy. Just a bad battery.

The two 309 work, but the 500 does not

Have you heard from Bluetti?

I never buy these new when they first come out. There are ALWAYS issues. I let others go through the BS for a few months til they get ironed out. Bluetti isn't known for fast responses to problems. Hope you don't wait too long.

50 bucks says it's just a bad battery.