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Harmony Link (Poland–Lithuania electricity interconnection)

plannedstage: permits
700 mln EUR
programme budget (multi-year) · data from May 2021net or gross: not recorded≈ 3.0 bn PLN (value-by-stage, est., nominal)funding: EU Connecting Europe Facility (CEF) grant of over EUR 500 mln (awarded for the original subsea variant)

The second cross-border electricity interconnection between Poland and Lithuania, delivered jointly by the transmission system operators PSE and Litgrid. Originally approved in May 2021 as a 700 MW submarine HVDC cable (cost approx. EUR 700 million with a CEF grant of over EUR 500 million, completion planned for 2025). The tenders for the offshore variant were cancelled in April 2023 due to a sharp rise in costs, and in late 2023 the operators agreed on an onshore variant. In its current form, on the Polish side an underground 220 kV cable line, Ełk Bis–Polish border, approx. 100 km long, is being built, running through six communes in the Warmińsko-Mazurskie and Podlaskie Voivodeships, together with two new substations – Norki in the Kalinowo commune and Wigry in the Suwałki commune – and modernization of the existing 220 kV Ostrołęka–Ełk Bis line; on the Lithuanian side the connection reaches the new Gižai substation. Construction is planned for 2026–2030, with the connection to be commissioned by the end of 2030.

How it went

Assessment: too early to assess, as of 15 Jul 2026. This is our reading, not a verdict, and we show it only where a quote from a source listed below stands behind it. Of the four, 2 carry no assessment yet, one has an assessment with no confirmed quote. How to read this section

No source calls this a delay and the card makes no assessment here, but the dates recorded on this project differ by 5 years: originally 2025, currently 2030.

Deliverynot yet due[3]

Timeline

  1. Announced21 Dec 2018
  2. Original date2025
  3. Current date2030

Change history

  • Aug 2024stage: permits
  • 21 Dec 2018stage: announced

Significance

A key element of synchronizing the Baltic states' power systems with the continental European grid and the second cross-border connection between Poland and Lithuania. It will increase energy exchange capacity and security of supply in the region; on the Polish side it means expansion of the transmission grid in Masuria and the Suwałki region (new Norki and Wigry substations, modernization of the Ostrołęka–Ełk Bis line).

Sources 10 · 7 independent · 8 archived

Every fact on this card comes from the sources below. Next to each source – which fields it supports.

Independence is counted the same way the gate that admits a record counts it: subdomains and titles from one publisher are a single voice, Wikipedia is zero. That is why the number is lower than the number of links. Three is the minimum.

  1. [1]PSE i Litgrid zatwierdziły decyzje inwestycyjne dla Harmony Link ↗archived ✓
    Polskie Sieci Elektroenergetyczne31 May 2021
    CostOriginal date
    CostCałkowity koszt Harmony Link wynosi 700 milionów euro.
    Original datePrzewidywany termin ukończenia praco to 2025 rok.
  2. [2]PSE and Litgrid signed cooperation agreement to build Harmony Link interconnector as overland line ↗archived ✓
    Polskie Sieci Elektroenergetyczne15 Jul 2024
    Investor
    InvestorPSE and Litgrid, transmission system operators in Poland and Lithuania
  3. [3]PSE i Litgrid będą współpracować przy realizacji Harmony Link jako połączenia lądowego ↗archived ✓
    Polskie Sieci Elektroenergetyczne (inwestycje.pse.pl)
    StatusCurrent dateDelivery
    Statusprzetargi na prace budowlane zostaną przeprowadzone w 2026 r.
    Current date · Deliverynowe połączenie zostanie oddane do użytku do końca 2030 r.
  4. [4]Litgrid started spatial planning for Harmony Link overland interconnector ↗archived ✓
    BalticWind.EU19 Aug 2024
    StageStage history
    Stagestarted spatial planning and environmental impact assessment works in Lithuania
    Stage historyLitgrid, Lithuanian electricity transmission system operator, started spatial planning and environmental impact assessment works in Lithuania
  5. [5]Harmony Link: morze czy ląd – operatorzy rozważają nowy wariant połączenia ↗archived ✓
    BiznesAlert.pl15 Nov 2023
  6. [6]Zamiast kabla podmorskiego będzie naziemne połączenie elektroenergetyczne między Litwą i Polską ↗
    PortalMorski.pl21 Dec 2023
  7. [7]Harmony Link ↗archived ✓
    Wikipedia (EN)
    Announced
    AnnouncedOn 21 December 2018, Lithuanian electricity grid operator Litgrid and Polish electricity grid operator PSE signed an agreement in order to start planning the cable.
  8. [8]Za ok. 3 mld zł powstanie nowa, strategiczna podziemna sieć energetyczna do granicy z Litwą ↗
    investmap.pl9 Feb 2026
    LocationInwestycja obejmie sześć gmin w województwach warmińsko‑mazurskim i podlaskim
  9. [9]PSE: w 2030 roku powstanie nowa podziemna sieć energetyczna do granicy z Litwą ↗archived ✓
    wnp.pl29 Jan 2026
  10. [10]offshore-energy.biz ↗archived ✓
    Funding
    FundingSpecifically, €493 million has gone to the construction of the Lithuanian-Polish interconnector Harmony Link.