Dogger Bank is specialised among offshore assets: three 1.2 GW phases, 277 GE Haliade-X turbines and a £9 billion capital structure, all sited up to 190 km offshore. The enabling factor is geology. A 15-to-36 metre sandbank permits conventional fixed-bottom foundations, so the project avoids the cost multipliers of floating platforms despite its extreme distance from the coast. Shallow water also simplifies installation logistics and keeps turbine-foundation costs standardised across all three phases.
Distance dictates the transmission topology. Over 150 km+ subsea routes, High-Voltage Alternating Current (HVAC) cables generate large capacitive charging currents that consume conductor capacity, leaving little for useful power. Moving to ±320 kV HVDC eliminates that charging current, because direct current has no continuous charge-discharge cycle. Offshore converter stations rectify the output, and onshore stations invert it, delivering gigawatts with minimal transmission decay. For a 190 km route, that is the difference between a viable export link and a stranded asset.
| Asset | Generation Capacity | Subsea Distance | Transmission Technology | Landfall Substation | Projected Commercial Completion |
|---|---|---|---|---|---|
| Dogger Bank A | 1.2 GW | ~130 km | ±320 kV HVDC | Creyke Beck | 2026 |
| Dogger Bank B | 1.2 GW | ~130 km | ±320 kV HVDC | Creyke Beck | 2026 |
| Dogger Bank C | 1.2 GW | ~190 km | ±320 kV HVDC | Lackenby | 2027 |
| Baseline onshore wind (indicative) | 0.05 GW | None | 33 kV to 132 kV HVAC | Local primary substation | Typically 18 to 24 months |
The project has no on-site chemical battery storage (BESS). Stability is instead delivered by the onshore converter stations, which can dynamically inject up to 200 MVAr of reactive power directly into the National Grid. This voltage-support capability standardises the plant's behaviour at the point of connection without a local battery footprint. Grid stability is therefore managed upstream, at the point of connection, rather than behind the meter. As far as we currently know, no battery storage is included in the three phases; any grid-scale storage near Creyke Beck or Lackenby would be a separate, independent project.
For distribution network operators and infrastructure investors, the characterisation is clear: Dogger Bank trades higher converter complexity for lower cable losses and favourable foundation economics. Developers equate full output to roughly six million homes and about five percent of UK electricity demand. Both are annual-average equivalences, not guaranteed instantaneous supply, because output varies with wind conditions. They apply only once Phase C completes in 2027. A further 1.5 GW phase, Dogger Bank D, remains at the planning stage and is excluded here.