Provides services in the fields of electrical engineering, building technology, and renewable energies. This includes, in particular, planning, consulting, monitoring, installation, assembly, maintenance, and servicing of all types of technical systems, including electrical systems, photovoltaic systems, battery storage systems, charging infrastructure for electric vehicles, heating, ventilation, air conditioning, and heat pump systems. Creates energy concepts, energy analyses, and measures to increase efficiency in building parks and offers services in energy architecture. Can carry out construction and renovation work on buildings as well as brokerage and management of real estate, furthermore acquire, dispose of, encumber, manage, rent, and develop real estate, make financings on its own or on behalf of others, and provide guarantees and bonds for subsidiaries and third parties, acquire, register, manage, encumber, and dispose of patents, licenses, and rights of all kinds, furthermore trade in goods of all kinds, in particular via online shops and digital distribution channels, participate in other companies at home and abroad, acquire or dispose of companies, establish branches and subsidiaries, and conduct all transactions that are directly or indirectly related to the company's purpose.