piereburt :
Solar energy is great and amazing technology in whole world. Its one type of fastest energy source. There are many renewable power sources like imported fossil fuels, volatility of energy prices, greater domestic economic development and many more.
How does that help him. Also, how are any of "imported fossil fuels, volatility of energy prices, greater domestic economic development" renewable power sources.
You'll need a solar charge controller, a 12V lead acid battery, and a case that comes with a 12V power brick and does the 3.3V and 5V regulation internally.
Wind power isn't useful without going through a battery either as the frequency and voltage changes depending on how fast they are spinning. Rectifiers and inverters are used.
EDIT: Or you could get a pc case designed to be used in a car, which would run off 12V.
A Raspberry Pi would also work, and need less power and only a good solar cellphone charger.