Planned · HVDC · subsea
Bornholm Energy Island
A planned hub on the Danish island of Bornholm that will collect offshore wind and send it to Germany and Zealand.
Route drawn between the landing points; outlines: Natural Earth.
- Route
- Denmark to Germany
- From
- Bornholm
- To
- Rappenhagen, Mecklenburg-Western Pomerania
- Length
- 173 km
- Of which subsea
- 160 km
- Capacity
- 2,000 MW
- Voltage
- 525 kV
- Type
- HVDC · subsea and land cable
- Status
- Planned (checked September 2026)
- Expected
- 2034
- Operators
- Energinet, 50Hertz
- Built by
- Siemens Energy (converters, awarded Sept 2025)
On 26 January 2026, at the North Sea Summit in Hamburg, Germany and Denmark agreed to develop Bornholm Energy Island together and to share the costs of the offshore wind farm behind it. The European Commission called it a first-of-its-kind project, and it comes with a €645 million grant from the Connecting Europe Facility.
The idea is to use the island of Bornholm, in the Baltic Sea south of Sweden, as a collection point for 3 GW of electricity from planned Danish offshore wind farms. From there two HVDC links carry the power ashore: 2 GW towards Germany, which this page covers, and 1.2 GW towards Zealand. Like the Kriegers Flak link further west, the cables will also allow trade between the two countries when the wind is light.
The German leg is about 173 km long. According to 50Hertz, roughly 160 km is submarine cable, landing in the port area of Vierow on the Greifswalder Bodden, and about 9 km runs underground to a new transformer and converter station at Rappenhagen in Mecklenburg-Western Pomerania. It will operate at ±525 kV DC. Siemens Energy was awarded the converters in September 2025. The project is a Project of Common Interest and appears in Germany’s grid development plan as measure M901a.
Energinet and 50Hertz are the joint operators, and commissioning is planned for 2034. The bilateral deal of 2026 settled who pays the support for the wind farm, basing the split on where the power flows and what each country gains. For the wider concept, see the guide to energy islands.
Against the other links
- 37th longest of the 54 links with a published length; the longest is Tyrrhenian Link at 970 km.
- 5th largest by capacity of 60; SuedLink leads with 4,000 MW.
- Other links from the same countries: ALEGrO, Baltic Cable, COBRAcable, Great Belt Power Link, Konti-Skan, Konti-Skan Connect, NeuConnect, NordLink and 4 more.
Bornholm Energy Island in brief
How long is Bornholm Energy Island?
173 km, of which 160 km under the sea, which makes it the 37th longest of the 54 links in this directory with a published length.
How much power can Bornholm Energy Island carry?
2,000 MW at 525 kV, 5th of 60 by capacity here.
When will Bornholm Energy Island be finished?
The published target is 2034.
Which countries would Bornholm Energy Island connect?
Denmark and Germany: Bornholm to Rappenhagen, Mecklenburg-Western Pomerania.
Who is behind Bornholm Energy Island?
Energinet and 50Hertz.
Who built Bornholm Energy Island?
Siemens Energy (converters, awarded Sept 2025).