The Energy Department (ED) is involved in the analysis of new markets and the identification and preparation of potential projects, especially in the area of production, distribution and energy consumption, which have potential for development in other departments. The work of the department is based on the feasibility assessment and other technological and economic analyses of thermal power plants, industrial plants, district heating plants and gas pipeline construction, urban power systems, energy efficiency of power plants and industrial systems and energy auditing and energy auditing of buildings.

Energy Department has the longest-lasting tradition. EKONERG Ltd. is a legal successor of the Institute for Electricity Industry – Department for Thermal Power Systems. From the research scientific institution, EKONERG has expanded its services in the field of consulting. The Energy Department works for ministries, local self-government units, energy public companies and the private sector.