Provider
- Phoenix Solar
- Solarwatt
- Vestas Wind
- Nordex Wind
- WSB Erneuerbare Energien
- VSB Energia Verde
- Trojer Hydropipes
Banks and investment companies
- All leading national and European bank institutions, investment companies and stock houses
Technical analysis and consulting
- Lameyers International
- Garrad Hassan
- IPHAT Institut für Photovoltaik und Halbleitertechnik
- Energy.Dis
- Protos Spa – società di controlli tecnici e finanziari
- Master Progetti
Law and tax firms
- Holzner Contax & Partner, Business Advisory Service and Tax Consulting
- TTG Taunus Treuhandgesellschaft
- Goebbers & Denk LLP
- Kiem Ganner Dilitz LLP
- Macchi di Cellere Gangemi LLP
- DLA Piper LLP
- Norton Rose LLP
- Roedl & Partner LLP
- McDermott LLP
- C Partners law and tax firm
- Studio Bernoni Professionisti Associati
