If all you’re using your power station for is running a fridge and charging miscellaneous electronics, you might be able to get by with just DC. AC Inverters can run hot and exacerbate your heat problem.
I’ve been running one of these for about 6 months. It powered my Iceco GO20 fridge and kept my phone, puck lights, and Surface charged on a 9500 mile road trip from NJ to WA, through all the national parks in UT (in the July heat), and back to NJ. I kept it charged via the outlet in the bed of my Tacoma. I might add solar eventually, but haven’t really needed to yet. I can’t speak to the longevity in terms of charge cycles since I haven’t had it very long, but overall I’m impressed with it, especially for the price compared to some other units out there. Here’s my thread about it. There’s some good teardown reviews on YouTube too.