We are constantly low on power to charge our electronics and often had the car running in order to have enough electricity to power the video camera, phones, trolling motor, etc. We have a small generator, but it took up too much room in the Element and bothered nearby campers. We finally bit the bullet and bought our first portable solar panel.
It put out more power than the reviews I read, but the quality of the workmanship and having sent me the wrong product had me do more research and hopefully found one with better fits our needs.
We are planning on traveling across the country and so I think a solar system is going to be a must.