Supporting Materials: • TenneT selects Fluence to develop and build two Grid Boosters at the substations in Audorf Süd in Schleswig-Holstein and Ottenhofen in Bavaria• The battery-based energy storage systems, with a combined power capacity of 200 MW, will increase transmission capacities of existing power lines, minimise grid interventions, increase renewable penetration, reduce grid expansion, improve security of supply, and help reduce costs to consumers (....)