Dude this is so freaking epic i cant even begin to describe it.
Right now we can tap "free energy" via solar , wind , water , heat... and tramsit that energy via electric lines anywhere on the planet.
I think what you are refering to is Tesla's efforts in wireless electricity. This would be free in the sense that it could be used by anyone for no cost however would still requre energy to transmit.
The only "free energy" device idea that Tesla documented so far as I am aware is the Radiant Energy Device , which would work however would require a tower 60 miles tall where it could tap into the electricity above the ionosphere!!!
