At the moment the charges generated are only small, but some things only need a small charge to operate. It is literally harnessing gravity. There is energy everywhere, it's just a matter of learning to harness it. Of course there is the known problem of inefficient, and destructive means of generating energy, being perpetuated due to vested interests. Energy sources such as this have been known for years by those who profit and administrate, and their existence has been smothered. Now with the net things like this are impossible to hide from the public, and their base fear may eventuate. That people will be able to be self sufficient. If the planet lasts that long.

I will have free electricity all year round.
It rains over 200 days of the year in Ireland.