Off-grid utility room size

[midrover170]

Hi folks -

Pretty simple question: for you off-gridders, what's the size of your utility room?

I'm working on my floorplan for a 30'x14' build. The utility room will be in an addition coming off the side of the main structure. Right now, the utility room is about 40 sf. The interior dimension are 7'8" x 6'. This is a weekend cabin where I'll have a 100 gallon water tank, tankless water heater and battery storage for solar. Not sure on the wattage for solar yet, but probably 6-10 batteries(?). I'll do tool/some pantry storage in a separate shed.

Thanks.