1. Technical University of DenmarkDepartment of Energy Conversion and Storage Frederiksborgvej 399 4000 Roskilde Denmark
2. EIFER (European Institute For Energy Research) Emmy‐Noether‐Strasse 11 76131 Karlsruhe Germany
3. Element Energy 78 Margaret Street W1W 8SZ London United Kingdom
4. Energy Saving Trust 30 North Colonnade, Canary Wharf E14 5GP London United Kingdom