Portable solar panels?

I have been fooling around with small solar generators lately. A cheapie 240WH no name at first, then after realizing how useful these things are in power outages and remote areas I picked up a name brand bigger one. The cheapie says it will take up to a 100w panel and I have a $60 one to play with. The cheap panel charged the small pack in a few hours of direct full sun after it was discharged about half way. The bigger one says it can take up to 220w. I'd like to have a portable panel…