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Fixed assets (Schedule of Fixed Assets) (Details) € in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 EUR (€) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 EUR (€)
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | € 264,095 |  |
Balance |  | 340,065 | $ 384,886 | € 264,095
Photovoltaic Plants [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 250,155 |  |
Gross carrying amount [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 274,520 |  | 122,571
Additions |  | 89,907 |  | 138,045
New companies |  |  |  | 13,961
Disposals |  |  |  | (52)
Effect of changes in exchange rates |  | 2 |  | (5)
Balance |  | 364,429 |  | 274,520
Gross carrying amount [member] | Photovoltaic Plants [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 223,626 |  | 102,784
Additions |  | 26,529 |  | 120,842
New companies |  |  |  | 0
Disposals |  |  |  | 0
Effect of changes in exchange rates |  | 0 |  | 0
Balance |  | 250,155 |  | 223,626
Gross carrying amount [member] | Pumped storage [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 16,607 |  | 0
Additions |  | 62,285 |  | 16,607
New companies |  |  |  | 0
Disposals |  |  |  | 0
Effect of changes in exchange rates |  | 0 |  | 0
Balance |  | 78,892 |  | 16,607
Gross carrying amount [member] | Biogas installation [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 34,107 |  | 19,588
Additions |  | 1,085 |  | 558
New companies | [1] |  |  | 13,961
Disposals |  |  |  | 0
Effect of changes in exchange rates |  | 0 |  | 0
Balance |  | 35,192 |  | 34,107
Gross carrying amount [member] | Office furniture and equipment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 180 |  | 147
Additions |  | 8 |  | 38
New companies |  |  |  | 0
Disposals |  |  |  | 0
Effect of changes in exchange rates |  | 2 |  | (5)
Balance |  | 190 |  | 180
Gross carrying amount [member] | Leasehold Improvements [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 0 |  | 52
Additions |  | 0 |  | 0
New companies |  |  |  | 0
Disposals |  |  |  | (52)
Effect of changes in exchange rates |  | 0 |  | 0
Balance |  | 0 |  | 0
Depreciation [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | (10,425) |  | (8,182)
Depreciation for the year |  | 13,937 |  | 2,299
Disposals |  |  |  | 52
Effect of changes in exchange rates |  | 2 |  | (4)
Balance |  | (24,364) |  | (10,425)
Depreciation [Member] | Photovoltaic Plants [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | (6,286) |  | (5,456)
Depreciation for the year |  | 10,971 |  | 830
Disposals |  |  |  | 0
Effect of changes in exchange rates |  | 0 |  | 0
Balance |  | (17,257) |  | (6,286)
Depreciation [Member] | Pumped storage [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 0 |  | 0
Depreciation for the year |  | 0 |  | 0
Disposals |  |  |  | 0
Effect of changes in exchange rates |  | 0 |  | 0
Balance |  | 0 |  | 0
Depreciation [Member] | Biogas installation [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | (4,002) |  | (2,545)
Depreciation for the year |  | 2,950 |  | 1,457
Disposals |  |  |  | 0
Effect of changes in exchange rates |  | 0 |  | 0
Balance |  | (6,952) |  | (4,002)
Depreciation [Member] | Office furniture and equipment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | (137) |  | (129)
Depreciation for the year |  | 16 |  | 12
Disposals |  |  |  | 0
Effect of changes in exchange rates |  | 2 |  | (4)
Balance |  | (155) |  | (137)
Depreciation [Member] | Leasehold Improvements [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | (0) |  | (52)
Depreciation for the year |  | 0 |  | 0
Disposals |  |  |  | 52
Effect of changes in exchange rates |  | 0 |  | 0
Balance |  | (0) |  | (0)
Carrying Amounts [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 264,095 |  | 114,389
Balance |  | 340,065 |  | 264,095
Carrying Amounts [Member] | Photovoltaic Plants [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 217,340 |  | 97,328
Balance |  | 232,898 |  | 217,340
Carrying Amounts [Member] | Pumped storage [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 16,607 |  | 0
Balance |  | 78,892 |  | 16,607
Carrying Amounts [Member] | Biogas installation [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 30,105 |  | 17,043
Balance |  | 28,240 |  | 30,105
Carrying Amounts [Member] | Office furniture and equipment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 43 |  | 18
Balance |  | 35 |  | 43
Carrying Amounts [Member] | Leasehold Improvements [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Balance |  | 0 |  | 0
Balance |  | € 0 |  | € 0
[1] | See Note 6D1, Reclassified

X
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- Definition The increase (decrease) in property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e&doctype=Standard -URIDate 2021-03-24 + Details
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