Energy efficiency is not only energy yield related to the energy consumption in a specific device or building but also the possibility of optimal use of the stored energy in a determine area or in the system, without the necessity for its transmission. Generation, distribution and balancing of energy demand, in a limited area, becomes an energy cluster in which, under the agreement of the entities forming the cluster, there is a possibility for effective management of energy produced and its storage, according to the requirements and assumptions of the capacity market.

The purpose of such an initiative is primarily the effective development of distributed energy, which does not have to be based solely on renewable energy sources, but can also use conventional sources, according to dedicated management models. The whole project is intended to improve energy security, have a positive impact on the environment, strengthen the local economy and generate lower costs for the end user.

According to the RES Act, a member of an energy cluster can be an enterprise, a natural person, a local government unit and their organizational units. It can also include small, medium and large public transport companies and other entities functioning in the area covered by the energy cluster. A cluster initiative may be established and operate in an area no larger than five municipalities or one county, and its purpose is to obtain financial and non-financial benefits for the members of the energy cluster.