Learn how to build solar panels and wind turbines - DIY?

I was wondering if anybody has tried the mentioned projects? I found http://www.diysolarpowerguides.com and have been doing some research. I have been wondering about the Earth4Energy guide in particular. I found some good information on it here if anybody else is here is interested or has any suggestions.

Thanks for any and all help in advance!
-Gordon

I have ever heard "Earth4Energy",and there are also some similar products, such as "GreenDiyEnergy", All these include step-by-step guide, instruction video,blueprint and so on. Although someone claim that these kinds of products are scam. I do not think so. The information you need about how to build homemade wind turbines also can be find on internet, but it will waste plenty of time and energy,like this http://www.builditsolar.com/Projects/Wind/wind.htm
the author list some magazines about building wind turbines, but these magazines are not free. The money you spend on collect these magazines will perhaps be higher than the "Earth4Energy" price,so i think the most efficient way to build homemade wind turbines is to buy one these kinds of guides.If you have any further questions, please visit my homepage "wind power cost" or email me!