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Restricted Cash and Deposits (Details) - Schedule of Restricted Cash and Deposits - Restricted Cash, Deposits and Marketable Securities [Member] - EUR (€)
€ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Schedule of Restricted Cash and Deposits [Line Items]    
Short-term restricted cash € 729 € 810
Short-term deposits 2,487 997
Restricted cash and bank deposits, long-term [1] € 17,340 € 17,386
[1] Deposits used to secure obligations towards the Israeli Electricity Authority for the license for the pumped-storage project in the Manara Cliff in Israel and to secure obligations under loan agreements.