The core activity of Zust + van Herk Elektro AG is the provision of services in the electrical sector, particularly in the areas of: electrical installations (lighting installations, photovoltaic systems, electric vehicle charging stations, network cabling), planning, consulting and execution of electrical projects, repairs and fault services, IT and network services, photovoltaic systems and renewable energies, ventilation, heating and air conditioning systems. The company offers its services to various customer groups, including private households, industrial and commercial enterprises, as well as public institutions.