>>381563I didn't do anything to the power system. I did find some extra batteries planning to make some kind of power bank like
>>381740 mentioned but never bothered with it. My phone has a battery pack and it usually lasts 3-4 days without a charge. using the 12v charger when i'm driving has kept it charged all the time so far. I do have a laptop and the battery lasts a few hours depending on what I'm doing. At first I would use it to sometimes watch movies but I really haven't used it in a while outside of town. I have a headlamp and a lantern that use rechargeable batteries. I charge the batteries and laptop at work.
I did really modify anything. I got the van for really cheap cause some of the windows were busted which were replaced with Plexiglas I got for free. Rad was leaking a bit and I fixed that with loctite. I removed a chair (see pic, but mine didnt have a table) in the middle row to have more room. I'm considering removing the back bench and using my hammock.
Air flow is great. all the windows have a screened vent that i can open.