0001883984 2026-08-19 2026-08-19 0001883984 alce:CommonStockParValue00001PerShareCustomMember 2026-08-19 2026-08-19 false 0001883984 --12-31 8-K 2026-08-19 ALTERNUS CLEAN ENERGY, INC. DE 001-41306 87-1431377 17 State Street Suite 4000 New York City NY 10004 212 739-0727 false false false false None N/A true false