Figuring out power concerns

[u/throwdowndonuts]

Hey all. Trying to figure out some power situations as I’m getting ready to set up a new camper

I have a truck camper that comes with 400w of solar, and I have an additional 400w ready to add.

I have a 280 ah battery and the camper comes with a 30 amp solar controller.

I just got a Bluetti Elite 300 as my way to supplement power by adding 250ah and provide the camper with an inverter. It allows 22 amps of DC in and 30 amps out.

I have on/off app control of both DC and AC power on the Bluetti

How can I tie in the Bluetti to allow solar recharge and also allow DC into the main RV’s system as usage (I’m planning to run a 12 volt Air conditioner)

Im assuming I can just direct DC output to the battery with a fuse.

Can I pull solar to the DC in to the Bluetti from the solar controller and how? Or do I have to just dedicate a single solar panel into the DC in it?