The Demi Saint Solar Panel 10W kit is on sale on Cdiscount. It includes an 18V/10W solar panel, which allows you to recharge the supplied generator.
This solar panel is waterproof, and therefore weather resistant. It comes with the necessary cables to connect it to the generator, as well as with LED bulbs, which allow you to light up at night, without consuming too much energy. The generator has several ports, making it easy for you to plug in and charge your devices.