Hi HappyMartin
I've got a Solio Solar Charger here at the moment, supplied by tribble who runs the retail-end for iRex in Germany...
You need to put a "Car-Charger" in between the Solio and the Iliad because the Slio does not have a plug to fit the Iliad's travel hub, but apart from that it should work fine. It's a bit of a cable-tangle however...

Since the shun is shinign (at last) today, I'm going to give it a try and will report how well it works...
The Solio has a strong (1600mAh) rechargeable battery inside, so it can handle the Iliad no problem, and if you have enough sunlight (which in your area of the world you should have) it should be quite hard to run out of power...but I'll see whether I can give you a bit more accurate information.