Yup. White for sure. Speaking from Arizona experience. But don’t overlook the windows, which are the biggest source of heat gain. Reflectix in the sunny side windows helps, along with sunshades on the front glass whenever you park.
Ours is also a light metallic silver, which isn’t bad and avoids the plumber’s van look. Not that there’s anything wrong with plumbers...
Note that it takes a pretty good-sized “portable” generator to run many A/C units. Might want to do some research on that. Onboard generators are around 2800W minimum.