The energy system transformation requires the involvement of citizens. Our citizen solar power plants enables us to offer people a way of participating financially in photovoltaic systems, who in turn benefit from a secure investment and favourable electricity tariffs, while promoting the expansion of renewable energy in the city and cutting CO2 emissions. In this way, individuals can help to secure a sustainable supply of energy for the future. So far, over 10,000 people have invested more than EUR 37 million in 27 solar power plants. Since 2012 120,000 megawatt hours of green electricity have been produced, saving around 40,000 tonnes of CO2.