In such grids the 'smart' contracts between any two peers is performed in autonomous manner by means of the smart meter such that the minimum cost is assured. The 'smart' contracts is assured by means of the smart tokens alongside with its hash code provided by the blockchain. Each of the consumer (the buyer) and the producer (the seller) has an ID that identify him. By approving the transaction by bothsides the smart contract is approved containing the producer, consumer and the traded energy amount and protected by means of the hash code as well as the its distributed nature.
Energy companies are encouraging customers to have solar power at no or minimum cost could be considered as buying reactive power for their system to increased efficiency.