it all depends on what is called "free" energy. some people call wind and solar energy "free" because once your solar cells are working, it does not cost anything more. it does not cost anything to use the power of the wind itself, only the generator, supports and the windmill, etc itself cost anything.

then again, perhaps the machine is free and only the license to use it cost anything.


the more man learns, the more he realises, he really does not know anything.