Using fan on battery power

The inverter is just a modified sine 1500W energizer inverter: https://www.amazon.com/dp/B00APL77T6/ref=cm_sw_r_cp_awd_hpn8wbE1MF5V3

I don't plan to use it continuously, but if I need to, say, use my heat gun for a few seconds while its at the storage facility without power in order to remove a pesky microwave sticker, then I'll have that option. I'm also going to test the TV and see if it works with modified sine. The I'll have to do some trials and see how many (if any) movies we could watch on a three day trip without running the two batteries all the way down. Of course, we've never watched movies while camping before -- seems like that's not the point, really -- but I want to know my options.

The reason for the size is that I'm installing the inverter nearly ten feet of cable away. With a peak of 3000W, and with 80% efficiency, we're looking at an amperage draw of 200A. From everything I read 2/0 would be a safe bet, but a little overkill in wire thickness never hurt anyone. Besides, I found a cheap and well-rated 0/1 cable from Amazon that is in a kit for powering amplifiers/subwoofers. The cable is quite flexible.

If it needs that large a cable you won't have to worry about using it for long on battery power...

Oh, ok. Thanks! I'll definitely charge it up all the way on packing up day.
I also put a switch on the batteries to shut them off when it's parked.

To digress...

I'm having a dilemma with that battery switch because it uses 4 gauge cable. I want to run my inverter with 0/1 gauge cable which means I can't run it through the switch. Am I right in thinking I would need a separate switch with 0/1 or just let the inverter be controlled by its own remote?

Also, I just realized that the zamp cables should probably bypass the switch too so that when I get solar panels they can still charge up the battery even when it's switched off... Not sure when I'd be leaving out the panels when the battery is off but anyway... Sorry - thinking out loud.

Yes. This was the first time I plugged in these GC2s from Costco. They haven't had a full charge from my van's power yet, though the indicator said they were full. Could that be an issue?

Hmm. I had it on while working on the pod all afternoon today and didn't notice much breeze -- but that may be because I was moving around and not sitting. It was an especially hot and sunny and not breezy day; I wonder if the FF can't counteract temps and still air of a certain degree.