Advic on which setup to use

Hi, Looking for advice on the best setup regarding the AC180 and expansion batteries.
My goal: Powering my pellet stove in the winter. The stove draws about 300-400 watts on startup and then settles down to about 160W-200W. I’m looking for the best set up to run the stove for a few days before recharging.
Do i go with the AC180 and several B80’s which are reasonably priced or step up to the B210,230?

Any suggestions to accomplish my goal without taking a second mortgage to fund it? lol

Also i’ve been looking for youtube videos on Stacking the AC180 with expansion batteries looking into how to stack,Charge run etc. Can’t find too much. Can anyone point me in the right direction?
TY

Keep in mind that if you do go for a B210 or B230, you will need to purchase a T500 AC adapter to charge it, and similarly, the B80 will require the T200S. In addition to that, you will need the right cable to use the expansion battery in powerbank mode. This would be an aviation to DC7909 cable.