Berlin is a leader in the field of energy technology. The city and its surroundings are among the regions with the highest density of environmental technology companies, research institutions and clean technology workers in Germany.

Berlin's energy technology industry includes the following sectors:

Solar Energy
Bioenergy
Wind Energy
Energy Efficiency
Turbomachinergy and power plant engineering
Energy grids and storage

About 42,000 people work in environmental technology and related fields in Berlin. 

Among the German Federal states, Berlin ranks just behind Bavaria and is neck-and-neck with Hamburg in terms of the concentration of environmental technology companies, research institutions and number of employees.  The city is home to firms producing components serving the generation and distribution of power as well as to research and development institutions active in the field of energy technology.  Many of the top energy firms are present in Berlin, and these companies offer a broad spectrum of energy-related services. 

Of the 10,500 companies with operations in Germany listed in the Database of Environmental Technology Companies (Umweltfirmen-Informationssystem - UMFIS) maintained by the German Chambers of Industry and Commerce, over 470 are in Berlin.

(Source: Innovationsmonitor Berlin|Brandenburg, 2011)