| 1 | | Wilhelm-Ostwald-Straße 10 | Siegburg |  DE | | Gas Company, Electric Utility Company, Gas Station, Water Utility Company | +49 2241107100 | | Wolfgang Reuter |
| 2 | | Industriestraße 62 | Oyten | DE | | Electric Utility Company | +49 42072291 | | Andreas Piepenbrink |
| 3 | | Lahnstraße 31 | Gießen | DE | | Electric Utility Company, Gas Company, Swimming Pool, Transportation Service, Water Utility Company | +49 8002302100 | | Winterkorn Andreas |
| 4 | | Hauptstraße 19 | Aham | DE | | Water Utility Company | +49 874496120 | | Rainer Obermeier |
| 5 | | Barbarossastraße 26 | Gelnhausen | DE | | Electric Utility Company, Water Utility Company | +49 6051840 | | Dirk Pitsch |
| 6 | | Nymphenburger Str. 4 | München | DE | | N/A | +49 899925750 | | Verena Ehlers |
| 7 | | Lindenstraße 30 | Bad Aibling | DE | | Public Works Department, Electric Utility Company, Energy Equipment and Solutions, Energy Supplier, Green Energy Supplier, Water Utility Company, Water Works | +49 806190660 | | Stefan Barber |
| 8 | | Magdeburger Allee 34 | Erfurt | DE | | Public Works Department | +49 3615640 | | Matthias Will |
| 9 | | Altau 10 | Weinheim | DE | | Sewage Treatment Plant | +49 620149780 | | Mohammad Hassan |
| 10 | | Neue Hüttenstraße 1 | Georgsmarienhütte | DE | | Distribution Service | +49 54012035 | | Michael Heberle |
| 11 | | Schulhausstraße 40 | Bad Säckingen | DE | | Energy Supplier | +49 776155020 | | Cebandt Ralf |
| 12 | | An d. Limpurgbrücke 1 | Schwäbisch Hall | DE | | Public Works Department | +49 7914010 | | Peter Breuning |
| 13 | | Neckarstraße 7 | Maintal | DE | | Distribution Service | +49 6181941060 | | Tilman Heiden |
| 14 | | Triftstraße 40 | Erfurt | DE | | Manufacturer | +49 3617315254 | | Oliver Meinicke |
| 15 | | Kirchpl. 2 | Dransfeld | DE | | Association or Organization | +49 550291050 | | Dirk Bankes |
| 16 | | Königstor 3-13 | Kassel | DE | | Electric Utility Company, Gas Company | +49 5617820 | | Jennifer Hoes |
| 17 | | Schleusenstraße 22 | Zehdenick | DE | | Public Works Department | +49 330746930 | | Matthias Kroenert |
| 18 | | Waldbachstraße 5 | Gernsbach | DE | | Gas Company | +49 722467412 | | Franziska Boll |
| 19 | | Gutenbergstraße 35 | Spaichingen | DE | | Gas Company | +49 74243531 | | Bertin Eberhard |
| 20 | | Bürgerparkstraße 9 | Cloppenburg | DE | | Electric Utility Company, Gas Company | +49 44717011420 | | Michael Lünsmann |
