December 2020 – In recent years, citizen energy communities that jointly produce renewable energy and sell it to the grid are starting to become integrated into the electricity grids in many EU countries. Cooperating as a community on joint energy saving is an even more recent development. In the European Horizon2020 project LIGHTNESS, five pilots on joint energy saving through an advanced network interface are tested in practice. The cases involve Zero Energy Houses in the Netherlands, social housing in Poland, a city as independent energy cooperative in Spain, a housing block in Italy and a business park in France. For Duneworks B.V., SPA Sustainability coordinates the work programme on citizen engagement.