The reason the eClipse is so unique is because it delivers 10W of power, which is twice the amount of power needed to recharge the internal battery. This 10W of power allows you to power your USB devices while the eClipse's internal battery is being charged at the same time!
I designed it with rugged use in mind. You can throw it in a back pack and go for hike or a camping trip and not worry about the panel or circuits being damaged. Please see the section "Built for Rugged Use". I describe what I did in the design to ensure this.
Don't see the answer to your question? Ask the project creator directly.