IN Brief:
- 50Hertz, AST, and Litgrid are developing the technical and economic concept for the Baltic-German PowerLink.
- The proposed 600km hybrid submarine connection would link Germany with Latvia or Lithuania and support around 2GW of offshore wind integration.
- Project of Common Interest status would strengthen the route within European transmission planning and funding processes.
50Hertz, AST, and Litgrid are developing the technical and economic case for the Baltic-German PowerLink, a proposed submarine electricity project in the Baltic Sea.
The connection would link Germany with a landfall point in either southwest Latvia or northwest Lithuania, using an approximately 600km submarine cable route and an onshore power hub capable of supporting around 2GW of offshore wind capacity.
Designed as a hybrid electricity connection, the project would combine interconnector capacity for cross-border trading with grid access for offshore wind farms. That model is becoming more prominent as offshore wind zones move further from shore and transmission planning shifts from radial connections towards coordinated offshore grid architecture.
The project has been submitted for inclusion in the European Ten-Year Network Development Plan, with its backers seeking Project of Common Interest status. PCI designation can support permitting, funding visibility, and regulatory coordination, particularly for infrastructure that crosses national borders and contributes to European energy-market integration.
The Baltic region’s grid position has changed materially since its synchronisation with the continental European system. Regional system integration now requires stronger interconnection, more flexible balancing resources, and new export routes for renewable electricity. Offshore wind development adds further pressure because generation capacity will need high-capacity transmission paths into both local and wider European demand centres.
Offshore grid projects across Europe are moving in the same direction. Belgium’s Princess Elisabeth Island offshore grid construction, cable campaigns for German offshore wind clusters, and wider North Sea reinforcement programmes all show how offshore generation is increasingly planned around transmission hubs, subsea cable corridors, converter capacity, and market design.
The Baltic-German PowerLink would add that structure to a region where cross-border electricity exchange is becoming central to security of supply. Germany continues to require additional import, export, and balancing capability as industrial electrification increases demand and renewable output becomes more dominant. Latvia and Lithuania, meanwhile, are working to strengthen their position within the continental European system while developing offshore wind and improving market liquidity.
Hybrid interconnectors carry a dense technical and commercial workload. Cable sizing, converter-station specification, protection coordination, curtailment treatment, congestion management, balancing arrangements, and cost allocation all need settlement before construction can begin. The physical route is only one element; the operating model has to work across several markets and regulatory frameworks.
The potential benefits are substantial where offshore wind resources exceed local demand and where stronger interconnection can reduce price divergence between markets. A hybrid route can move offshore generation to demand centres, support electricity trading, and provide system resilience during periods of stress.
Further studies will determine the preferred landfall, technical design, cost-benefit case, and regulatory pathway. Before cables are manufactured or installed, the project has to secure a planning position strong enough to justify detailed engineering and investment decisions. European offshore transmission is now advancing through that sequence: strategic status, technical concept, funding structure, and only then construction.
