Battery or 110v?

You would be fine with either elec or gas. Gas is the most efficient and will leave you a lot of room for hiccups like someone plugging in a hair curler etc.
Like many have said above, the 12 volt option is the most inefficient way to go....it will drain a battery(s) very quickly.

The best I ever got out of 12 volts on a three way fridge was to cool it was down on AC or gas, switch to 12 volts for the road and watch the temperature slowly but surely rise to beyond safe limits to preserve food.

Steve

More interested in your newish canned ham, your small profile pic does not do it justice ;)

wa8yxm wrote:
Most RV fridges draw about 350 watts.

Now on AC that's about 3 amps

On DC, that's 30

Many however have smaller DC heat elements and do not work as well on DC

YUP, a lot of the confusion is whether amps of 12 VDC or amps of 120 VAC are being discussed. OVER 10X difference, particularly when using an inverter, since they are NOT 100% efficient.

Use the fridge on propane or 120v. Not 12v. Fridge is 300w max on 120v and that is what I would do.

As long as you don't use any big stuff (microwave, hair dryer, electric water heat, air conditioner) you will be fine.

Worst case turn something off and reset the breaker.

The small fridges use less than a pound a day!

How big a fridge do you have.

Here's the info on a 2 cuft model, 645 BTU/H on High, bigger 3 ways use ~1000 BTUH
https://www.dometic.com/d5cc849a-fb08-49a0-a703-d488f773cf9e.fodoc

Most RV fridges draw about 350 watts.

Now on AC that's about 3 amps

On DC, that's 30

Many however have smaller DC heat elements and do not work as well on DC

15 amps ?? That will run the fridge and the microwave, and maybe the converter too,....but only if the Batts are fully charged.

Thanks for all of the input! I see there is a difference of opinion...
I will try to dig out the book for the fridge and see if it states the wattage, Bryan's info may help on that. And, not sure why I didn't think of this - I have it running now on an extension cord from the house. I'll check that breaker and see what amp it is. I think I'll be ok with the 15amps but can always switch it over. My propane tank is an 11 pounder, which lasts me about 3 1/2 days for the fridge when it's full.

Now if some of the replies above don't confuse you........