Provision of services in the form of expert opinions for customers in the energy sector, including the planning of electrical machines and systems, their control and monitoring, logistics for commissioning, as well as consulting services for customers in the field of building technology regarding the measurement of water, electricity and gas consumption, planning including project management for the setup and maintenance of the corresponding measurement systems, creation of individual and/or collective consumption data regarding energy consumption over the time periods desired by customers, and proposing renewal and maintenance measures for physical installations based on the measurement data obtained; may establish branch offices and subsidiaries, participate in other companies, acquire, encumber, sell and manage real estate, arrange financing for its own or third-party account, and provide guarantees and sureties for subsidiaries and third parties.