Let's face it, there are few options for off-grid van lifers when it comes to staying cool. This includes fans and air conditioning, although the latter is an expensive and least used option,.
There are two fans that are popular with the van life crowd, the MaxxFan and the Fantastic Fan
Maxxair (MaxxFan Deluxe Fan with Remote and White Lid)
Fan-TasticFan (Vent RV Roof Vent with Thermostat, Manual and Automatic Speed)
Air Conditioning Units
I researched the standard RV units. Below was the best that I found on the market a a reasonable price point.
There are ways to keep cool in the summer without an air conditioner. Here are a few:
1. Look at how you van is parked. The direction in which you are parked impacts the inside temperature of your campervan. For those of us with solar panels we want to maximize the sun exposure, but there's to find the balance and keep part of the rig in the shade, preferably the part with the windows
2. Make sure that you have sunshades on your windows. This will help reduce the heat transfer.
3. Ventilation - In addition to having your fan and windows open, open up your side and back doors.
4. Create your own AC using a cold wet towel suspended from your fan. The air will cool as if passes over the cold wet towel and cool you down.
Disclaimer: Although a participant in affiliate programs, my posts are based on my direct experience and research for the materials used in my build.