- Iberdrola's SP Energy Networks awarded contracts worth over £3 billion (~€3.5 billion) for the Eastern Green Link 4 subsea HVDC interconnector.
- Siemens Energy will build two 525 kV HVDC converter stations to convert AC/DC for long-distance transmission.
- Prysmian was earlier contracted for ~640 km of cable (530 km subsea, 116 km underground) in a £2 billion (~€2.3 billion) deal.
- EGL4 will have 2,000 MW capacity, span around 640 km mostly subsea between Fife and Norfolk, supply over 1.5 million homes, begin main construction in 2028 and commission in 2033.
Overview
SP Energy Networks has awarded contracts worth over £3 billion (~€3.5 billion) for Eastern Green Link 4 (EGL4), a subsea high-voltage direct current (HVDC) interconnector between Scotland and England.
Contracts and suppliers
Siemens Energy will build two HVDC converter stations; Prysmian was earlier contracted to supply roughly 640 km of cable (about 530 km subsea and 116 km underground) in a separate £2 billion (~€2.3 billion) agreement.
Technical specifications and route
EGL4 will operate at 525 kV HVDC with 2,000 MW capacity, transmitting electricity over approximately 640 km—mostly subsea—between Fife in Scotland and Norfolk in England, converting AC to DC for long-distance transmission and back for grid integration.
Schedule and related projects
Main construction is scheduled to start in 2028 with commissioning in 2033; EGL4 complements Eastern Green Link 1, another 2,000 MW link whose construction began in 2025 and is due for completion in 2029.
