There is a lot of resistance from utility companies that are resisting solar energy.
In Hawaii,the utilities are now charging the customers for the energy they pump back onto the grid,claiming they were using"THEIR INFRASTRUCTURE" to distribute it.
All of the infrastructure was paid for by customers.
Any new equipment is paid for by raising rates.So how is it"THEIR"infrastructure?
IMHO:This smacks of corruption at the highest level.(Of course,I could be wrong,this in only a personal opinion,it is just how it appears to me. (Take it for what it is worth...open market value: 1/8 billionth of a majority) 
Eventually all states and utilities will use this excuse to justify charging customers for taking excess energy off of their hands.
Utilities are panicking.The era of centralized power is coming to an end,and homes will eventually be self powered due to advances in solar,wind,and other technologies not yet discovered or utilized.
A small inertial battery,buried in a containment vessel,like a bored well will become a viable storage media as high strength materials become more available and affordable.Permanent magnet bearings are much simpler on a stationary rotor that in a moving vehicle,and of course,the rotor will be running in a vacuum.
I think world wide power sharing will eventually become a reality.The seasons are opposite across the planet,and one side will have an excess of power when the other side needs it.Room temperature superconductors will enable this.
As I said,this is just how I see it.
Dissenting opinions are always welcome.
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