There was a Kickstarter to do a flywheel system like this at a household level: http://www.kickstarter.com/projects/1340066560/velkess-energy-storage http://ww

There was a Kickstarter to do a flywheel system like this at a household level: http://www.kickstarter.com/projects/1340066560/velkess-energy-storage http://www.kickstarter.com/projects/1340066560/velkess-energ...