Right, I think what you will find is that perhaps unlike your experiences abroad, the US offers a wider range of climates at much closer distances. As a result, we try not to visit the desert in the summertime and if we find ourselves in a consistently inhospitable hot environment, we make good use of the fact our 'house' is on wheels and go somewhere else.We would have died without an AC. It’s 99 in Moab right now.
Nonetheless, It's still intriguing to hear you running an AC off just batteries vs generator. That's attractive. We purposefully left enough room and pulled wires for the addition of an AC in the future if the need called for it but haven't found it critical......yet