I started with a Goal Zero Nomad 7 plus the Guide 10 charger. That's a nice, very portable system, great for charging AA batteries directly and other small devices through its USB output. I keep four Eneloop AA batteries in it to act as a power reserve when using the USB out.

The Nomad 7/Guide 10 is a small system though, only good for limited small items. So I recently upped the size to a 100 watt panel and a Goal Zero Yeti 400, truck portable but not something you can backpack. Quite a bit more energy storage and the ability to charge bigger items -- the Yeti 400 outputs 12 VDC, 2xUSB, 2x120VAC. But it won't run a refrigerator.

Eventually, I want a system big enough to run a refrigerator while charging a power pack large enough to run the 'fridge after the sun goes down. That's a goal, I'm not there yet.