I'm not buying the solar hub because I want to save the planet more because it has a battery in it. If you combine the hub and battery its less connections and cables, no need for the y cable, you can also connect multiple devices.
My general experience with solar gadgets is that they don't really work unless you have days to charge them (before anyone else says it that maybe because I'm in the UK and we don't get that much sun). If you can charge it by other means and will deliver enough current then it should be OK, which it looks like it will. You'll then have a similar setup to what I list above but sub this for the power monkey.