Awnings over the windows help a lot, especially with my single-pane windows. This weeks it's in the 90s again AND high humidity. That's a terrible combo over just heat alone. When it gets like this, I get relief from putting my solar panel awnings over the driver side of the camper and reflectix between the window shade and glass on the inside. It's dark as hell inside but it helps me keep the camper at 74 degrees with the mini-split running.
Once the sun goes down, even if it's still hot, the AC is able to keep the camper at 70 degrees. Right now it is 1:00pm EDT, 31 degrees C (88 F), and about 65% humidity. My total AC load is currently 458 watts, with the thermostat set to 74 degrees and all the window shades closed with reflectix in the window. There are only three AC loads at the moment: the air conditioner, an electric fan on medium, and a microwave clock. When the AC and fan are not running, the inverter shows 3 watts (mostly from the microwave on standby). I have a 12k BTU 120 volt mini-split made by LG. When I first start up the AC to cool the camper, it'll pull 600-700 watts until it backs off when the camper is cool and then runs between 150-400 watts to maintain it depending on the outside temp and time of day. My rooftop unit pulls between 1,400 and 1,600 watts when it's running. Total daily consumption without me living in the camper is 10kWh just with the mini-split and fan trying to keep the camper between 72-74 degrees. Right now the camper is sitting in my driveway while I'm monitoring consumption. Once cooled down, my 12v compressor fridge consumes about 65 watts on average all day if we're not living in the camper and about 90ish watts on average when we're camping.
Hopefully that provides some decent info for whoever asked about consumption.