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Operating Segments - Schedule of Segment Adjusted Gross Profit (Details) - EUR (€) € in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Solar [Member] | Italy [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues | € 2,293 |  |  |  |  |
Operating expenses | (109) |  |  |  |  |
Depreciation and amortization expenses | (89) |  |  |  |  |
Gross profit (loss) | 2,095 |  |  |  |  |
Adjusted gross profit (loss) | 2,095 |  |  |  |  |
Segment assets | 67,546 |  | 43,071 |  | 22,608 |
Solar [Member] | USA [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues |  |  |  |  |  |
Operating expenses |  |  |  |  |  |
Depreciation and amortization expenses |  |  |  |  |  |
Gross profit (loss) |  |  |  |  |  |
Adjusted gross profit (loss) |  |  |  |  |  |
Segment assets | 55,564 |  | 6,612 |  |  |
Solar [Member] | Israel [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues | 278 | [1] | 675 | [2] | 1,119 | [3]
Operating expenses | (142) | [1] | (342) | [2] | (418) | [3]
Depreciation and amortization expenses | (48) | [1] | (461) | [2] | (512) | [3]
Gross profit (loss) | 88 | [1] | (128) | [2] | 189 | [3]
Adjusted gross profit (loss) | 317 | [1] | 1,223 | [2] | 1,565 | [3]
Segment assets |  | [1] | 28,297 | [2] | 34,750 | [3]
Subsidized Solar Plants [Member] | Spain [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues | 2,974 |  | 2,791 |  | 3,264 |
Operating expenses | (519) |  | (517) |  | (322) |
Depreciation and amortization expenses | (919) |  | (912) |  | (908) |
Gross profit (loss) | 1,536 |  | 1,362 |  | 2,034 |
Adjusted gross profit (loss) | 1,536 |  | 1,362 |  | 2,034 |
Segment assets | 12,633 |  | 12,807 |  | 14,577 |
28 MW Solar [Member] | Spain [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues | 1,741 |  | 4,051 |  | 3,597 |
Operating expenses | (593) |  | (1,825) |  | (1,399) |
Depreciation and amortization expenses | (1,088) |  | (946) |  | (427) |
Gross profit (loss) | 60 |  | 1,280 |  | 1,771 |
Adjusted gross profit (loss) | 60 |  | 1,280 |  | 1,771 |
Segment assets | 19,403 |  | 19,691 |  | 20,090 |
Talasol Solar [Member] | Spain [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues | 18,365 |  | 24,971 |  | 32,740 |
Operating expenses | (4,695) |  | (5,786) |  | (8,764) |
Depreciation and amortization expenses | (11,453) |  | (11,459) |  | (11,400) |
Gross profit (loss) | 2,217 |  | 7,726 |  | 12,576 |
Adjusted gross profit (loss) | 2,217 |  | 7,726 |  | 12,576 |
Segment assets | 225,452 |  | 231,142 |  | 244,584 |
Biogas [Member] | Netherlands [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues | 15,094 |  | 17,021 |  | 12,640 |
Operating expenses | (13,887) |  | (14,733) |  | (13,186) |
Depreciation and amortization expenses | (2,316) |  | (2,670) |  | (2,824) |
Gross profit (loss) | (1,109) |  | (382) |  | (3,370) |
Adjusted gross profit (loss) | (1,109) |  | (382) |  | (3,370) |
Segment assets | 32,360 |  | 31,164 |  | 32,002 |
Dorad [Member] | Israel [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues | 67,084 |  | 63,973 |  | 62,813 |
Operating expenses | (50,065) |  | (47,322) |  | (47,442) |
Depreciation and amortization expenses | (2,489) |  | (5,689) |  | (6,339) |
Gross profit (loss) | 14,530 |  | 10,962 |  | 9,032 |
Adjusted gross profit (loss) | 14,530 |  | 10,962 |  | 9,032 |
Segment assets | 109,579 |  | 97,339 |  | 107,079 |
Manara Pumped Storage [Member] | Israel [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues |  |  |  |  |  |
Operating expenses |  |  |  |  |  |
Depreciation and amortization expenses |  |  |  |  |  |
Gross profit (loss) |  |  |  |  |  |
Adjusted gross profit (loss) |  |  |  |  |  |
Segment assets | 186,333 |  | 172,096 |  | 137,432 |
Total Reportable Segments [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues | 107,829 |  | 113,482 |  | 116,173 |
Operating expenses | (70,010) |  | (70,525) |  | (71,531) |
Depreciation and amortization expenses | (18,402) |  | (22,137) |  | (22,410) |
Gross profit (loss) | 19,417 |  | 20,820 |  | 22,232 |
Adjusted gross profit (loss) | 19,646 |  | 22,171 |  | 23,608 |
Segment assets | 708,870 |  | 642,219 |  | 613,122 |
Reconciliations [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues | (67,362) |  | (64,648) |  | (63,932) |
Operating expenses | 50,207 |  | 47,664 |  | 47,860 |
Depreciation and amortization expenses | 2,515 |  | 6,125 |  | 6,830 |
Gross profit (loss) | (14,640) |  | (10,859) |  | (9,242) |
Adjusted gross profit (loss) | (14,869) |  | (12,210) |  | (10,618) |
Segment assets | (31,613) |  | (29,367) |  | (36,965) |
Total Consolidated [Member] |  |  |  |  |  |
Schedule of Segment Adjusted Gross Profit [Line Items] |  |  |  |  |  |
Revenues | 40,467 |  | 48,834 |  | 52,241 |
Operating expenses | (19,803) |  | (22,861) |  | (23,671) |
Depreciation and amortization expenses | (15,887) |  | (16,012) |  | (15,580) |
Gross profit (loss) | 4,777 |  | 9,961 |  | 12,990 |
Adjusted gross profit (loss) | 4,777 |  | 9,961 |  | 12,990 |
Project development costs | (4,101) |  | (4,465) |  | (3,784) |
General and administrative expenses | (6,063) |  | (5,283) |  | (5,855) |
Share of income of equity accounted investee | 11,062 |  | 4,320 |  | 1,206 |
Other income, net | 3,409 |  |  |  |  |
Operating profit | 9,084 |  | 4,533 |  | 4,557 |
Financing income | 2,495 |  | 8,747 |  | 6,443 |
Financing income in connection with derivatives and warrants, net | 1,140 |  | 251 |  | 605 |
Financing expenses, net | (23,286) |  | (12,555) |  | (10,524) |
Profit before taxes on income | (10,567) |  | 976 |  | 1,081 |
Segment assets | € 677,257 |  | € 612,852 |  | € 576,157 |
[1] | The results of the Talmei Yosef solar plant are presented as a discontinued operation and the plant was sold in June 2024. The gross profit of the Talmei Yosef solar plant located in Israel is adjusted to include income from the sale of electricity (approximately €1,264 thousand) and depreciation expenses (approximately €757 thousand) under the fixed asset model, which were not recognized as revenues and depreciation expenses, respectively, under the financial asset model as per IFRIC 12.
[2] | The results of the Talmei Yosef solar plant are presented as a discontinued operation, and the plant was sold in June 2024. The gross profit of the Talmei Yosef solar plant located in Israel is adjusted to include income from the sale of electricity (approximately €3,844 thousand) and depreciation expenses (approximately €1,818 thousand) under the fixed asset model, which were not recognized as revenues and depreciation expenses, respectively, under the financial asset model as per IFRIC 12.
[3] | The results of the Talmei Yosef solar plant are presented as a discontinued operation and the plant was sold in June 2024. The gross profit of the Talmei Yosef solar plant located in Israel is adjusted to include income from the sale of electricity (approximately €4,546 thousand) and depreciation expenses (approximately €2,051 thousand) under the fixed asset model, which were not recognized as revenues and depreciation expenses, respectively, under the financial asset model as per IFRIC 12.

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