It is interesting but the Ac300 manual doesn’t list the cable that connects the ac300 and b300 together as included in the box and so I don’t know what it’s called or where to get another one. The reason is I want to connect two AC300 units to one B300 battery. So one b300 battery will power up and run to ac300 units connected to it. Is that possible? I asked Bluetti this question but I think they are still thinking? The units are working great for me by the way. Thanks for the input!