D050S and B210

Hi
Can I use my B210 expansion battery to charge my house battery through the D050S, without being connected to my AC200L? (The D050S manual only mentions charging the house battery from AC200L, or other non-power bank sources.)
Thanks
Anita

@Anita Are you trying to charge the B210 with the D050S? That’s possible, but it’s a bit of a hassle to buy another adapter cable.

@BLUETTI Thanks for the quick reply.
No, I am wanting to charge the caravan 12V house battery from the B210. (Using the D050S - it’s meant for charging the house battery from something like a Bluetti battery isn’t it? Or am I misunderstanding something?)

Or am I calling it the wrong thing? I am looking at the Bluetti D40 DC-DC Battery Charger. Is that the same thing as the D050S?

@BLUETTI_CARE I would like to charge my caravan house battery from B210 via the D40 DC-DC Battery Charger. Can I do this?
Thanks.

If it’s D40, then yes.

Great! Thank you for your help.