...lar thermal and 10,340 m3 pilot pit storage.The targets on cost efficiency are for solar thermal to meet the vision of ESTTP with a cost of 3-6 €-cent per kWh, total energy production costs of 78 Euro/MWhthermal and (low) investment costs of 33 Euro/m3 of the pit heat long term storage. Flexibility in energy output has been obtained through including ORC and the heat pump. The capacity of the pit ...