If your genny is working at least you can plug a fan in...
Not much help if you're driving a cabover though, those fuckers get HOT inside. For your sake, I hope you're in a conventional rig.
The generator is working fine. When I am parked it provides ac for me. It's enough to cool the sleeper but that's about it. I have a 12 volt fan I'm using right now while driving but it isn't really a lot of help.
Yeah, I drive a conventional. A 2006 Western Star. I haven't been inside a cabover in years.