My parents have solar panels that came with their troopy (so I personally don't know whatts etc), but they run to the truck battery (second battery I think). They also have an inverter. With their set up they can run the laptop here & there, & car fridge no worries, but we still run the truck for 20 or so minutes every few hours just to be sure. Not sure if they have actually used the solar panels yet. Will have to find out when they get back. Curious now.

I'm considering buying my own battery pack the way the kids leave interior lights on in my car

I do alot of travelling with my phone & ipod, but not my lap top. The battery doesn't charge anymore anyway. I do want an inverter, but I think I need a car better set up for that kind of usage.