It is getting confusing which batteries are compatible with the various AC units and what mixes of battery types are supported.
As I understand it, on one of the AC500 ports I could attach any combination of B300S and B300K batteries daisy chained together. It’s also my understanding that the B230 could be attached to the AC500 but not at the end of a daisy chain with the B300S or B300K batteries.
AC500->B300S->B300K->B300K on one port and
AC500->B230 on a second port
but these would not be supported:
AC500->B300K->B300K->B230
or
AC500->B300S->B300S->B230
FYI, no response here so I asked Bluetti support. The B230 is not supported by the AC500. It is my understanding from support that mixed combinations like AC500->B300S->B300K->B300K on one port will work.
I’m not sure your reseller is correct, the B300K manual seems to say the opposite. See screenshot below. Thanks to Bluetti_Care for confirming/denying. Note the line “B300K/B300 to B300S” below
You have a clear answer from Bluetti admin below: your seller is wrong and you are right to check !
Bluetti admin :
" Yes, no problem. A single AC500 can connect up to 6 battery packs max.
You can choose to connect 3B300K on one side and 1 B300K+2*B300S on the other side AC500 to connect B300K need to use the optional cable: P090D to P150D."
Hi @digait, Thank you for raising this question.
Each AC500 supports up to 6 batteries, allowing B300K and B300S to be mixed and used together. We recommend connecting B300K before B300S, as placing B300K at the end may cause it not to activate or shut down in sync with the whole system. @Snips1’s explanation is correct, and we appreciate the professional and helpful support.
My AC500 was running fine with three B300K batteries here in California. One night, I decided to attach a fourth battery, which was a B300. As soon as it reached 100% the following afternoon, I heard the alarm. I disconnected the B300 and noticed the BMS over-voltage Error. I read in the Forum how someone screwed up their B300S doing the same thing with the same error. Bottom line is it appears to be touch-n-go with the Bluetti AC500 and I am only going to attach B300K batteries. It’s a shame, because I have extra B300 and B230 batteries.
Hi @Bjameson, regarding the overvoltage issue reported by the AC500, please first check if the BMS (Battery Management System) of all batteries has been updated to the latest version. If not, please update them one by one first.
After that, please recalibrate the system.
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 it is charging.
You can click this link for reference. https://www.youtube.com/watch?v=XMHLtqlDnus
Just FYI. I have been doin g the time consuming thing of discharging the Batteries to match them to a new B300K (I have 4 B300Ks). When I received my last B300K, my 3 B300Ks plugged into my AC500 were all at 89%. I turned everything off, and charged the one new B300K battery up from around 50% when I got it to 89%. I then made 2 stacks of 2 and plugged the 2 sets into the 2 P150D ports of the AC500 and it has been working fine for weeks. n other words, instead of discharging, I upcharged the one new battery to match the 3 that I already had and took off.
