| Tallinn University of Technology |
EE |
| Technical University of Denmark/Department of Civil Engineering |
DK |
| Technical University Riga - Department of Energy Systems and Environment |
LV |
| Technische Alternative GmbH |
AT |
| Technische Universität Dresden, Energy System Engineering and heat Economy |
DE |
| Technological Institute of Canary Islands - ITC |
ES |
| Tecnoma Energia Solar, S.A. |
ES |
| TNO Building and Geosciences |
NL |
| TSB Technologiestiftung Berlin |
DE |
| UCD Energy Research Group |
IE |
| University of Lubuljana, Faculty of Mechanical Engineering |
SI |
| Viessmann Werke GmbH & Co. KG |
DE |
| Wagner & Co. Solartechnik GmbH |
DE |