On the occasion of the official liberalisation of EU electricity and gas markets on 1 July, a renewable-energy group has complained to the Commission and European Energy Regulators that a lack of transparency and blocked access to energy grids are preventing them from competing on the market. 

According to small- and medium-sized generators of electricity, including solar, wind, hydro and biomass facilities, a decentralised energy market is a prerequisite for achieving the "ambitious targets for renewable energy and energy efficiency that were laid out by heads of state and government during the Spring 2007 European Council".

These "micro-generators" complain that the current regulatory structure in a number of member states prohibits access and limits fair competition, and call for a transparent streamlining and standardisation of grid access across the EU.

However, not all agree that decentralisation is entirely beneficial.  

Some proponents of a more centralised model argue that supplying energy should be a public service shielded from unpredictable market forces, and that decentralised generation will lead to massive price fluctuations with potential supply disruptions caused by lack of oversight of a centralised grid.