Hi. I’m curious about the P090D-to-DC7909 adapter.
It’s advertised as being suitable for the EB150 only.
I’m assuming a ‘7909 connector’ would be a standard size, so you’d think this adapter could connect a B230/B300 to the AC200P’s AC input port. But Bluetti indicates you need both a P090D-to-XT90 plus a D050S charging enhancer (which has a 7909 connector on the end) to link to the AC200P’s AC input port.
Can the P090D-to-DC7909 be used to connect a B230/B300 to the AC200P’s AC input port?
If not, I’d like to understand why.
I’ve tried it, it doesn’t work on my AC200P’s AC port but works fine on the PV port with a 7909 adapter. Because of that I haven’t bothered trying my D050S through the AC port since there would be some wattage loss going that route.
Thanks for sharing your experience Eric.
Makes me feel better that I chose the P090D-to-XT90 option when buying the B230. I have the D050S also, but hoped to use that just as a charger rather than having to swap it in as a secondary connection to the AC200P.
You also appear to have confirmed my suspicion that using the D050S between the two units comes with an overhead. So I’ll probably stick to connecting via the PV port
Thanks again for your input.
After researching further, I’ve noted the input port for the EB150 has a voltage range of 16-60v.
All I can find for the AC200P is mention of a “maximum” 58.8 input voltage for its AC adapter port.
So I suspect the AC200P probably has higher minimum input voltage requirements, which gives me the WHY a direct connection from the B230 via the P090D-to-DC7909 adapter won’t work. Hence the need for the D050S charging enhancer, as it will increase the voltage going into the AC200P.
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You’re exactly right. The AC ports on the B230/300 and AC200P/Max require 58.8V as the input voltage and the raw battery output from the B230/300 is 51.2V I believe. The D050S brings it up to 58.8V but as mentioned it uses some power to operate it’s own circuit.
Thanks for confirming. 
Thanks Jason for confirming my suspicions. I’m tying my B230 to my AC70 in power bank mode, and using the D050 IS needed to boost the power up to 58v. I don’t need the P090D to DC7909 cable, which would have been useless. Am I correct?
First look at the description of the P090D cable (to MC4, DC7909, XT90, XT60, aviation…) to understand: This cable allows the activation of the powerbank mode on a B230 or B300 and allows you to output more than 500 watts (!) between 49V to 54V (the battery voltage). Generally we plug this cable into the solar input of other bluetti units to recharge them.
External Battery Connection Cable For BLUETTI EB150 | EB240 | AC180 (bluettipower.com)
The D050S will take a DC voltage between 12 and 60V (10A max) and will output a voltage of 58.8V and 500W max (it depends on the input power) via the DC7909 plug to be able to power bluetti units equipped with an input for the AC-DC adapter (like the T500). to simplify, the D050S is a charger like the T500 ac-dc adapter, but the difference is that the T500 is connected to the grid (AC) the D050S is connected to solar panels, or other DC sources (batteries, 12VDC sources, AC-DC adapters between 12V and 60V ).
BLUETTI D050S DC Charging Enhancer User Manual (manuals.plus)
Do I have to have the adapter to connect my B230 battery to an AC300? Or does the large cable do the same thing?
First of all I don’t have an ac300.
Bluetti says that only the B300 is compatible with the AC300, it is not written anywhere that you can connect the B230 with the big expansion cable to the AC300 and that it can work. I don’t think I’ve read that anyone has tested it to verify.
In any case if you have an unused solar input (dc1 or dc2) on the AC300, you can certainly connect a B230 via the P90D to MC4 cable and power the AC300 in powerbank mode. However it only works in one direction, the ac300 cannot recharge the b230, the b230 can only recharge/power the ac300.