wire size

I'm stuck on wire size from inverter to my Yurts main breaker. I have a 3000 watt 24v pure sine wave inverter. My main breaker is set up at 100amp. Only one real appliance will be running 24/7 which is a new Samsung inverter fridge. other than that it will be limited computer and tv and LED lights. can I get away with using 6awg welding wire from inverter to main?

3000W/120V=25A. Assuming the most your inverter can output is 25amps, 6gauge is more than ample for this application.
Refer to this wiring chart. You could get away with using 10 gauge.

Now, the wire from the battery to the inverter is a different matter. 3000W/24V=125A. You'd want at least 0 gauge. For my 24V system, I'm using 000 gauge.

@saltedbeardman, it looks like you've posted the same query twice. Your other post is here: https://diysolarforum.com/threads/wire-size.7967/

I thought the query looked strangely familiar!