Dogger Bank C
Final phase of the 3.6 GW Dogger Bank Wind Farm complex.
Status
Under Constructionlifecycle stage
DeliveringHafrok completion outlook
Ownership
Location
United KingdomNorth Sea
Technology
Capacity
1,200 MW ◆
Turbines
87 ◆
Model
GE Haliade X ◆
Foundation
Monopile ◆
Site & conditions
Site rights
Seabed rights held ∴
Origination
Crown Estate Round 3 · 2010 ·
Water depth
20–32 m ≈
Wind speed
10.4 m/s @ 150 m ≈
Revenue & grid
Offtake
CfD · AR3 · £41.611/MWh ◆
Grid
Secured ◆
Connection
Lackenby 400kV (HVDC onshore converter station near Redcar) ◆
Schedule
FID
Dec 2021 ◆
COD · announced
2028 ◆
COD · Hafrok
2028 expected
Delivery outlook modelled by Hafrok · calibrated on delivered projects
2028
expected year of commercial operation
Chance of delivery
≈98%
estimated chance this project reaches commercial operation
Under Construction projects complete ≈97% of the time on Hafrok's record. A secured offtake contract lifts this one slightly; its size and technical complexity pull a little the other way.
COD outlook
If it completes, when — Hafrok’s probability by year (teal) · the developer’s COD guidance, by date stated (ink)
| Year | Probability |
|---|---|
| 2028 (expected) | 86.7% |
| 2029 | 13.3% |
| Stated | Announced COD |
|---|---|
| 2021-12-02 | 2026-Q1 |
| 2025-05-23 | 2027 (held since 2024-05-22, 3 statements) |
| 2026-05-06 | 2028 |
How Hafrok got this date
1
Starting point: the last dated milestone
Construction start in
2022. From there Hafrok adds how long similar projects (in established offshore-wind markets) took to reach commercial operation, measured on projects that have delivered.2
Typical timing
Starting point plus the typical remaining time gives a middle estimate of
2024; the faster quarter of similar projects would be done by 2023, the slower quarter not until 2025. Dates already in the past are moved up to today — this project has run beyond the typical timing.3
Result
Expected commercial operation
2028, likely range 2025–2027 (the middle half of outcomes for similar projects). The developer's announced date falls inside that likely range, so the announced date is adopted.4
Year-by-year chart
The bars spread that estimate across years using how similar projects actually slipped against their dates — more often late than early, which is why the bars lean right.
5
Chance of delivery — separate from timing
Start from the share of Under Construction projects that went on to complete — ≈97%, measured on Hafrok's record of delivered and abandoned projects, with an allowance held back where that record cannot yet speak (projects still unresolved, changed market conditions). Based on the measured record — all 257 construction starts with a final outcome reached operation — adjusted down for projects still mid-build and for legal-challenge risk. Then adjust for this project's own evidence — offtake, market, size, technical complexity — to ≈98%, which rates it
Delivering on Hafrok's four-step delivery scale (Delivering · Expected · Prospective · Fragile).Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record
Origination · 2010-01
Crown Estate Round 3
- Awarded to
- Forewind (SSE, RWE Npower, Statoil, Statkraft)
- Zone
- Dogger Bank zone
- Basis
- seabed award
From the auction results — the round that created the project.
JV entry · 2021-11
SSE Renewables / Equinor → Eni 20%
- Stake
- 20%
- Consideration
- €164m
- Implied 100% value
- €820m
- Implied
- €0.68m / MW
- Announced
- 2021-11
- Closed
- 2022-02
- Project stage
- pre-FID
Eni acquired 20% of Dogger Bank C (10% from each of SSE and Equinor). Announced consideration GBP 140m (GBP 70m to each seller). Closing consideration GBP 136m (EUR 164m). Financial close reached 1 Dec 2021. Converted at GBP/EUR ~1.17 (2021). Eni's stake later transferred to Vårgrønn (Plenitude/HitecVision JV) in Oct 2022.
Evidence
From Hafrok’s transactions record
Secondary trade · 2022-06
Eni Plenitude → Vårgrønn (Plenitude / HitecVision JV) 20%
- Stake
- 20%
- Consideration
- not disclosed
- Announced
- 2022-06
- Closed
- 2022-10
- Project stage
- under construction
Intra-group restructuring — companion record to Dogger Bank A. See Dogger Bank A record for full context.
Evidence
- Dogger Bank Wind Farm JV — Vargronn acquires Plenitude's 20% interest in Dogger Bank Wind Farm ↗ 2022-10 ◆ held
From Hafrok’s transactions record
Dashed tick marks today (9 Sep 2026). The ▲ below the spine is the developer-announced COD. The teal diamond on the spine is origination — the seabed award or round that created the project. Every other ownership event lives in the band below: one station per recorded deal, dated at its label, in deal order rather than to calendar scale. Secondary trades appear only at the interchanges; grey lines are parties whose entry or exit Hafrok’s record does not hold.
Announced COD: slipped so far +2.4 yr (first announced 2026-Q1) · the full guidance history is in the delivery chart above
Revenue & offtake contract duration and price levels · money of the day
CfD-backed offtake
● CfD · AR3
Price£41.611/MWh ·Basis2012 real · CPI-indexed
Capacity1,200 MWAwardedSep 2019Term15 yrs · delivery 2024/25
Money-of-the-day values computed by Hafrok from the United Kingdom CPI index, 2012 real base — actual to 2026-07, then an assumed +2.0%/yr (central-bank target). Cfd terms run 15 years from start of generation in the contracted delivery year.
Contract price over time · £/MWh
solid = actual CPI indexation · dashed = assumed +2.0%/yr
CfD · AR3
Installation how the build is going · from satellite counts and Hafrok’s registers
Satellite installation tracker
counted from satellite radar images · a structure standing in the sea on a given date, not a turbine producing power · a guide, not a sourced fact
Installation · counted from satellite
Foundations87 of 87≈100% · first seen 2025-04-27
Turbines6 of 87≈7% · first seen 2025-05-09
Latest count2026-08-30from 544 satellite passes · 1 substation platform left out so the counts compare with the turbine number · anything first seen in the last 60 days is not yet confirmed
Hafrok counts foundations and turbines from satellite radar images (≈): a structure is counted once it is seen standing in the sea, which is not the same as producing power. A structure first seen in the last 60 days is not yet confirmed, because on a single image a freshly set foundation and a ship holding position look alike. Substation platforms are left out so the counts compare with the number of turbines. Rows marked with a dot (·) come from Hafrok’s own registers; a supplier or contract appears only where a source states it — everything else reads “not recorded”, never guessed.
Structures standing over time · count
strong line = confirmed · light line = seen in the last 60 days, not yet confirmed · the chart counts every structure (87 turbines + 1 platform); the table counts turbines only
foundationsturbines up (a substation top being set in place counts here too)
Installation contracts
FoundationsSeaway Strashnov◇Seaway7 · foundation installation vessel · 2025 → 2025-11 · Completed
TurbinesSeaway Ventus◇Seaway7 · foundation and turbine installation vessel · 2027 · Contracted
Offshore substationSleipnir◇Heerema · heavy-lift vessel · 2025-05 → 2025-05 · CompletedSatellite image
Image taken2026-09-02≈Copernicus Sentinel-1 radar satellite, northbound pass · 6 newer passes skipped because the satellite’s track only caught part of the farm (the best of them 67%)
Farm covered73%≈a ring on black is a structure this pass could not see, not a mistake
Structures ringed88 confirmed · 0 not yet confirmed≈as counted on 2026-08-30 · the image is newer than the count, so a bright spot without a ring may be a structure not yet counted
Construction ports
PortMaraen Port of Nigg ◆turbine marshalling
Contains modified Copernicus Sentinel data 2026, processed by ESA and by Microsoft Planetary Computer.
Latest satellite radar image · 2026-09-02
a radar picture, not a photograph: the sea is dark, steel is bright · black is beyond the edge of the image
confirmed structure (88)seen recently, not yet confirmed (0)probably a substation platform (a larger structure than a turbine; the register above has the facts)farm boundary
Grid connection
from Hafrok’s substation, converter and cable registers
Offshore platforms · 1
HVDC systemDogger Bank C HVDC·1200 MW · ±320 kV · under construction, expected 2026
Export & onshore
Export cableDogger Bank C Export Cable·HVDC subsea · 500 km · NKT · under construction · to Lackenby, Teesside
Onshore connectionLackenby Substation (Dogger Bank C / Sofia connection)·400 kV · under construction · also serves Sofia Offshore Wind Farm
Converter supplierHitachi Energy·Dogger Bank C HVDC · Aibel (Haugesund, Norway) · for National Grid ESO
Grid connection · ready in time?
when each part of the grid connection is due, against the start date the developer states (black line) and the year Hafrok expects (teal band) · a bar spans the whole year, quarter or month the source gives
installed or in serviceexpected deliveryearlier date that was later moved
Sources & verification
13/17 fields verified · rests on 16 sources (14 primary) · ◆ 12 documents held
◆Verified≈Modelled◇Sourced∴Inferred⌁Convention○Unverified∅No source·Derived
Numbers are stable citation ids — grouped by source class, so they are not consecutive.
Regulator3
[1]
legislation.gov.uk2015-08-04◆ The Dogger Bank Teesside A and B Offshor…
"Work No. 1A — (a) an offshore wind turbine generating station with a gross electrical output capacity of up to 1.2 gigawatts comprising up to 200 wind turbine generators each fixed to the seabed by m…
supportsConsentTotal capacityFoundationCoordinatesConsent granted
[3]
DESNZ (gov.uk)2019-09-20◆ Contracts for Difference (CfD) Allocatio…
“Doggerbank Teeside A P1 | Doggerbank Offshore WindFarm Project3ProjcoLimited | Offshore Wind | 1200.00 MW | £41.611/MWh | 2024/25”
supportsMechanismStrike / priceDetailCfD · AR3
[15]
Department for Energy Security and Net Zero2026-05-06◆ Renewable Energy Planning Database (REPD…
“REPD Q1 2026 quarterly extract — Ref ID 2517: Site Name "Dogger Bank C (was Teesside A)", Development Status "Under Construction", Installed Capacity 1200 MWelec, Operator "SSE/Equinor (formerly Stato…”
supportsRegister entry
Operator7
[4]
Dogger Bank Wind Farm (SSE Renewables / Equinor)2021-12-02◆ DOGGER BANK C REACHES FINANCIAL CLOSE - …
“SSE Renewables, together with its joint venture partner Equinor, has reached financial close on Dogger Bank C … first power is anticipated in Q3, 2025 and full power in Q1, 2026. Onshore cable install…”
supportsFinal investment decisionOnshore construction
[5]
Equinor2021-12-02◆ Equinor and partner reach financial clos…
“Reaching financial close on the third phase of Dogger Bank is a significant milestone as it demonstrates that we are on track with developing what will become the world's largest offshore wind farm.”
supportsFinal investment decision
[6]
Dogger Bank Wind Farm2022-10-17◆ Vargronn acquires Plenitude's 20% intere…
“Vårgrønn acquires Plenitude's 20% interest in the world's largest offshore wind farm … SSE Renewables (40 per cent), Equinor (40 per cent) and Vårgrønn (20 per cent).”
supportsoperatorowner
[7]
SSE Renewables2024-12◆ Dogger Bank Wind Farm signs vessel reser…
“When fully complete in 2027, Dogger Bank will be the world's largest offshore wind farm.”
supportsModelSeaway Ventus — turbine installation
[11]
SSE Renewables2025-05-23◆ Dogger Bank Wind Farm and delivery partn…
"Dogger Bank Wind Farm and its delivery partners have completed the installation of the HVDC offshore substation platform for Dogger Bank C, the third and final offshore substation platform across all…
supportsStatusConnection point
[16]
National Energy System Operator (NESO)2026-07-21◆ NESO Transmission Entry Capacity (TEC) R…
“NESO TEC Register, edition 21 July 2026 - PRO-000409: "Dogger Bank Project C", Status "Consents Approved", MW Connected 0, Effective From 2025-04-01, Customer "DOGGERBANK OFFSHORE WIND FARM PROJECT 3 …”
supportsRegister entry
[17]
Equinor2026-05-06◆ Equinor Q1 2026 results call transcript …
"When it comes to Dogger Bank C, the transition pieces those things are ongoing. And we actually, well, no, let me say -- those were actually completed. Those are actually done half a year ago. And we…
supportsCommercial operationCOD history
Record source2
[20]
offshore-energy.biz / offshoreWIND.biz2025-09-03◆ oe-dbc-iac-strashnov-2025-09
Press report — cited, not quoted; read it at the source link.
supportsSeaway Strashnov — foundation installation
[21]
Dogger Bank Wind Farm (SSE Renewables / Equinor / Vargronn)2025-05-23◆ doggerbank-dbc-hvdc-platform-2025-05
Manufactured and supplied by Aibel and installed by Heerema Marine Contractors' Sleipnir vessel, the Dogger Bank C platform measures approximately 75 x 50 metres across and 36 metres high and sits on …
supportsSleipnir — substation installation
Trade press4
[8]
reNEWS2025-11-15
Press report — cited, not quoted; read it at the source link.
supportsTurbinesFoundation
[10]
offshoreWIND.biz2026-05-12
Press report — cited, not quoted; read it at the source link.
supportsturbine marshalling
[12]
[13]