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Details of the Statements of Profit or Loss and Other Comprehensive Income (Schedule of Costs and Depreciation) (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Details Of Statements Of Profit Or Loss And Other Comprehensive Income Loss [Abstract]
Depreciation from fixed assets	€ 13,937	€ 2,299	€ 5,744
Depreciation from Right-of-use assets	774	320	321
Amortization	365	356	351
Professional services	1,496	482	672
Operating and maintenance services	11,390	4,025	5,322
System operator charges	3,046	0	0
Insurance	549	178	344
Other	1,043	266	300
Total operating costs	€ 32,600	€ 7,926	€ 13,054

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It represents system operator charges.

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Total operating costs.

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The amount of amortisation expense. Amortisation is the systematic allocation of depreciable amounts of intangible assets over their useful lives.

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The amount of depreciation expense. Depreciation is the systematic allocation of depreciable amounts of tangible assets over their useful lives.

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The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets]

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The amount of expense arising from purchased insurance.

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The amount of miscellaneous other operating expenses. [Refer: Other operating income (expense)]

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The amount of expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'nature of expense' form for its analysis of expenses. [Refer: Expenses, by nature]

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The amount of fees paid or payable for professional services.

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