Entities: Corporations and Government Agencies Supplying and Managing the Grid
Because the energy economy is highly centralized, it is largely controlled by a realatively small number of players. That centralization is in part a historic consequence of the nature of the 19th and 20th century energy technologies based on fossil fuels. The very different nature of emerging renewable energy technologies makes possible a reinvention of the energy economy wherein energy consumers generate their own energy.
The shape of that reinvention has yet to be seen. Many interests are promoting a centralized model of renewables where, for example, vasts fields of mirrors in the desert produce certified renewable renewable energy and ship it to cities, nearby and cross-countinent via new transmission infrastructure. Existing RPS policies may even be preferential to the centralized model, and certinaly some corporations would stand to benefit from contracts for large solar farms in the Mojave Desert.