The OÖ Energiesparverband is the regional energy agency of Upper Austria. It drives the energy transition by providing comprehensive services to private households, businesses and municipalities. Key activities include face-to-face energy advice sessions (10,000 per year), training programmes and the development and management of funding programmes on behalf of the regional government. The ESV has issued or checked over 150,000 energy performance certificates for buildings. The agency supports energy technology companies in the context of the Cleantech-Cluster (a business network). It is active in European projects and organises the World Sustainable Energy Days, an annual conference that attracts more than 600 participants from 50 countries every year.