Free energy my eye! He charged the batteies by taking his wind turbine for a drive in a gasoline power truck. Now, suppose he puts this outside and let's nature do the work. His wires are going to wrap around the post. He needed to include a set of brushes between the wind vane assembly and the stand pipe.
As demonstrated, it is about useless.
"free electricity" BAHAHAHAHAHA ROFL!!!!
This short 10 minute video gives you detailed step-by-step instructions as to how to build your own cheap and cost effective Wind Turbine
"free electricity" - ROFL!