Solar powered window fan

It's just one of those things that makes sense, usually the sun is shining when you need a fan to cool off. So why not power that fan using energy from the sun? Solar powered window fans are popping up all over these days and there is even talk of a solar powered air conditioning system available on the next Toyota Prius. In addition to basic home solar window fans and even solar car window fans, there are also solar powered attic fans (which have larger panels and usually work better due to direct sun exposure).

This particular fan shown above is about half a window's width in length and can be used to circulate the air inside your house, apartment, dorm room, kitchen, bedroom, living room, garage, or anywhere else really, even inside of a car or RV potentially. Unfortunately, based on the reviews we've read this particular unit is a bit weak and only works in direct sunlight, but as photovoltaic panels become more and more efficient with higher output this type of device will surely improve. Until then, it's not a bad idea, even if it is a bit lacking in power, and if you (as a reader of Green Home Authority) are aware of a fan like this that does work well or that you have used yourself then please share your tips and links below!