good advise above.
Would like to add our personal experiences. (your mileage may vary
We had trouble keeping our inverter running while traveling.
Would find it not outputting AC during stops and would have to turn it off then back on to continue.
Lots of troubleshooting with no resolution.
While at the Fall Rally a couple years ago, we had a GOOD electrical systems tech suggest: make sure the ice maker was turned off while traveling because it uses a lot of power when it cycles.
Last year we upgraded to 4 - 6v GC batteries
replacing dealer supplied 12v ones.
This has eliminated any
inverter/refer issues while traveling (6+ hours) and I believe we should get 20 - 24 hours from fully charged batteries. (untested yet...)
so, in summary: (sorry I've gotten so long winded...)
1. Good batteries, well maintained.
2. Turn off ice maker while traveling.
3. Verify inverter output as part of check list.