The aim of the project is to develop services aimed at stabilising and regulating the operation of medium voltage distribution networks (system services) using lithium-ion-based energy storage facilities. Currently, there is a continuous increase in installed power of unstable energy sources (wind, solar energy), which requires the development of new methods of stabilising electrical grids and in particular medium-voltage networks. The stabilisation methods used so far by large generation units with adequate capacity reserves are insufficient and inefficient. In order to reduce energy losses and related costs, stabilisation should be as close to unstable energy sources as possible and adapt automatically to local grid conditions. The developed energy storage together with an advanced control system will provide a range of system services tailored to the user’s requirements. The project also provides for the development of a billing model with distribution system operators (OSD) and other technical elements allowing effective provision of such services, which will result in the provision of high quality electricity to end users in terms of its parameters and continuity of supply. The project will create a technology demonstrator in the form of a 500 kVA power warehouse and a capacity of 750 kWh located near an existing solar power plant with a capacity of 500 kW. In addition, the elements of the distribution network will be equipped with a measuring infrastructure providing information on the current state of the network to the energy storage, whose control system will attempt to respond automatically to any disruption in its stable operation by providing the necessary system services to local distribution network operators (OSD).