Currently, the most used solution for the use of surplus energy, especially in households, is grid transfer. If there are several households nearby or households and companies that generate their own energy, they can merge into one energy community. The Energy Community is an organised group of people who take steps to move their immediate surroundings towards the generation and use of clean energy on a non-profit basis. There is no limit to the scale of energy generation, it goes from a few solar panels to a wind farm. Energy communities most often unite the inhabitants of a city, municipal quarter, or street.

The main goal of energy communities is to promote the use of renewable energy in the vicinity of a specific place (village, small town, or city), to preserve the environment and to strengthen the economic potential. Energy communities are united by the fact that locally generated energy is primarily used by local people. For example, if solar panels are installed on an apartment building, then the energy generated is first used in communal buildings, and then it is used by the apartment owners of the existing house. If all the electricity generated is still not fully used, it is transferred to other nearby houses or to the grid.