ProLiteGear.com shows you how to take a UPS (Uninterruptible Power Supply) and modify it to be a Solar Generator like the GoalZero Yeti Solar Generators. These portable power generators can then be used in emergency situations, for camping, or as backup power at your house. The modification allows them to be recharged via solar panels. The total cost can be much less than the Goal Zero products if you get creative. A fun, practical project, that is not that difficult.