So let me make sure I understand. Goal Zero 400 would cost $450- ish, and it is "compatible" with a solar charger panel from ... Goal Zero. I reasonably portable panel with at least some capacity would be the Escape 30, for another $240. So one would now be into this for close to $700. For a system that has a 33 amp battery and takes (per GZ's webiste) what looks like 40 hours to fully charge? To summarize- not convenient, expensive and low capacity all around. But it does LOOK cool.