Earth4Energy is a complete scam - not a question about it. There are now enough people writing the details, to have them exposed - there is no reason to pay any money for DIY plans - all needed is available - general suggestions seems to be that you pay for what you get. I will not be trying to build one myself, but if you do - enjoy - it is not only about the money - hobbies are OK also - I play golf ...... For list of power factor correction and other scams - so many ..... http://open4energy.com/forum/home/scam/energy_saving_scams