AC300+B300K combo and AC200MAX compatibility

Product Discussion BLUETTI AC Series
1

I was thinking about purchasing the AC300+B300K combo that’s currently being offered on Bluetti’s website, and I was wondering if anyone in the forum could help me with the following questions:

  1. I currently have an AC200MAX - would I be able to daisy chain it into the AC300+B300K system?

  2. The ad for the combo mentions “Split Phase Bonding: Achieve 240V output for heavy-duty devices”. My house has a NEMA L14-30 input for supplying power to a generator panel - would I be able to supply 240V through that NEMA L14-30 connection from the AC300+B300K combo?

  3. Can I charge the AC300+B300K setup using a conventional gas generator while the AC300+B300K system continues to power the house?

Thanks for you help!

2

@MichaelCopp

  1. No, the two systems cannot be combined.
  2. Two sets of AC300+B300K are needed to provide a 240V output.
  3. Yes, but in this case, it is equivalent to the generator bypassing the load.
3

Are there any other accessories I would need to buy besides the two sets of AC300+B300K combos?

Could I use the gas generator to charge the AC200MAX, while at the same time using the AC200MAX to charge the AC300+B300K combos?

4

A fusion box and some wiring are necessary; you can contact our support team for specific connection cables.

Yes. However, in practice, there will be high-frequency circulating currents when two inverters charge each other, resulting in significant reactive power. For example, if the AC200MAX shows an output of 2000W, the actual power reaching the AC300 might only be 1000W. (This is just an example; different models may vary.) Therefore, I still recommend direct charging.

5

If I purchase a P030A fusion box and use it to connect the two AC300+B300K combos, can I connect the gas generator to just one of the combos and charge both combos concurrently, or would I have to hook up two connections from the gas generator (i.e., one connection for each combo)?

6

No, you need a split-phase charging cable and a 240V dual-phase generator to charge two AC300 units. If you want to switch to single-phase charging, you can only disconnect the dual-phase cable and charge them one at a time.

7

My assumption is that AC300+B300K combos come with a charger that plugs into a conventional home outlet. Approximately how long does that charger take to charge up the combo?

8

AC charging time = battery Wh/AC adapter power W + (0.5-1h)
Just count the capacity of the B300K, as the AC300 does not have an internal battery.