I doubt the electric companies would allow those users to use the companys power grid independently; and it would have to be nearly impossible to set up your own physical power grid (both financially and getting the rights to build on the roadside).
Right now In Europe , at least in northern EU, it is allowed to give your energy back to the gird and get paid for it. But there is bureaucracy and also the price what they give is smaller than price which we pay when we buy from them ( at least that was some time back when i was researching this problem). Also our market recently underwent somewhat decentralisation in some sense. From beginning of time we had one electricity company which dictated the price. Now we have several and also possibility to buy solid payment plan or chose to risk and buy from something like stock market.
In the present day however, the energy market is undergoing a major shift from an established dogma. We need to observe, and accept the major disruption happening... Disruption is a fashionable and often abused term, which is particularly apt to describing whats happening in energy though.
Numbers are what really counts. They are facts.
Lets use a concrete example. Italy.
The Italian energy market only ten years ago had only thermal power and imported nuclear power from France and Switzerland.
Today out of 137 Terawatt/hour of yearly consumption in Italy, 38 % comes from solar and wind!!!!
That's a MASSIVE disruption!!
It was incentive scheme based, so privileged, but today we've achieved grid parity with renewables. They are cheaper than any fossil fuel, even coal.
Decentralization is a reality! Its not tomorrow.. Its NOW.
Batteries will only accelerate the process.
If you look at other European countries the business case is even stronger. France is the real bomb, sitting on nuclear reactors which all need urgent and major overhaul and that often don't make any more financial sense. Renewables will be the only answer. And they are exploding in Europe. I work on this every day. I'm not guessing.
This very interesting information regarding shift to green energy in South Europe. But Thats south, they have crucial ingredient SUN!
I do not see how North could go green in such extent as South.
Yes, we have Hydro, we have wind. But it is not enough if the South cant supply us with clean sunny energy, It think, the way to go is Nuclear. If its used responsibly , it is 100 times better than burning coal and 10 times better than burning wood, diesel and gas!
That all being said, the biggest challenge is to implement the block-chain in heavily regulated and lobbied market. I hope that individual bold and brave governments can lead the way with successful pilot and commercial block chain products.