Please update me on this topic since i have a similar problem with 2x B300 (When you have a solution). What really strange is and also can see on your screenshots, it still charge the B300 thats almost full. Not the B300 that is on 40%.
@BLUETTI_CARE
I hope that you will look into this problem because it is very annoying for me.
I am now very familiar with the function of the AC300 and the B300, but I cannot find a solution without your support.
Best Regards
Joachim
I do not have an ac300 with several b300 but an ac200max with a b230 and I sometimes notice the same problem when my b230 is connected to the ac200max: the ac200max SOC is indicated at 87% and the SOC of my b230 is indicated at 57% and yet it will charge the battery of the ac200max and not the b230! . Same problem as you. The only remedy I found is to recalibrate my b230, after disconnecting it from my Ac200max ( I discharge with the 12v output or with the expansion port in power bank mode with the p090d cable to mc4 or xt90, I charge with the AC DC adapter). If you have not done so, I recommend recalibrating each B300 disconnected from your AC300, with the AC-DC t500 adapter.
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Hello BLUETTI_CARE,
I would like to ask you again to help me.
Please take a look at the problem I described above.
Best regards, Joachim
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Hallo BLUETTI_CARE,
ich möchte sie an dieser Stelle nochmals bitten mir zu helfen.
Schauen sie sich bitte das Problem an, was ich oben geschildert habe.
Gruß Joachim
More than two B300 batteries shoud not connect to a single battery port of the AC300. It would put a huge load on the first one (or two cable) segments coming out of the AC300. They may become hot and overheat. So for more than two batteries, they should be installed in two chains, balancing the load on the cables.
As far as I am aware, the AC500 system and B300s batteries are using cables that are thicker and can carry more load, so three B300s (or two B300s + one B300) can go on a single chain. (Not sure if one B300s and two B300 batteries are also possible.)
If that were really the case, Bluetti would have pointed this out in the user manual.
As an EE, I understand your explanation. The P090A cable is rated at 90 A which can support two B300 batteries supplying up to 40 A each in parallel for a totall of 80 A at close to 50 V ( almost 4 kW ideally).
The P150A cable supplied with tbe B300S is rated at 150 A which can support three B300S at 40 A each for a total of 120 A at close to 50V ( almost 6 kW ideally).
Adding a B300 battery to the AC500 needs the P150A to P090A cable, and that will limit the maximum current to 80 A, so the B300 must be on a differnt expansion port on the AC500 or at the end of the chain if any B300S batteries are connected. The single B300 battery cannot supply the full 5 kW of power that the AC500 handles.
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