Storgrundet
Located 15 km off the coast of Gavleborg county in the Gulf of Bothnia. One of the few Swedish offshore wind projects to secure environmental permits.
Status
Early Developmentlifecycle stage
ProspectiveHafrok completion outlook
Ownership
Skyborn Renewables — 100% ◆Location
Baltic Sea
Technology
Capacity
1,000 MW ◆
Turbines
—
Foundation
—
Site & conditions
Site rights
Application filed ◆
Water depth
13–37 m ≈
Distance from shore
15 km ◇
Wind speed
8.9 m/s @ 150 m ≈
Revenue & grid
Offtake
—
Grid
No agreement ◆
Connection
Grid connection permit application not yet submitted. Skyborn … ◆
Schedule
FID
Not taken
COD · announced
2031 ○
COD · Hafrok
2035 expected
Delivery outlook modelled by Hafrok · calibrated on delivered projects
2035
expected year of commercial operation
The developer says 2031; Hafrok expects 2035 — 4 years later.
Chance of delivery
≈49%
estimated chance this project reaches commercial operation
Early Development projects complete ≈61% of the time on Hafrok's record. This one sits well below that: a market with a thinner delivery record, its size, technical complexity and no offtake contract yet.
COD outlook
If it completes, when — Hafrok’s probability by year (teal)
| Year | Probability |
|---|---|
| 2034 | 14.1% |
| 2035 (expected) | 28.0% |
| 2036 | 22.7% |
| 2037 | 14.6% |
| 2038 | 8.7% |
| 2039 | 5.1% |
| 2040 | 3.1% |
| 2041 | 1.8% |
| 2042 | 1.1% |
| 2043 | 0.7% |
How Hafrok got this date
1
No dated milestone yet
Nothing is consented or financed with a date, so the estimate starts from today (
2026), adds the time similar projects (in developing offshore-wind markets) took from consent to operation, plus an allowance for obtaining consent.2
Earliest credible date
Typical consent-to-operation time plus allowances means commercial operation before
2034 is not credible.3
No route to market yet — counted from 2029
The project has no offtake contract yet. No contract, auction or tariff exists in Sweden today that a project without an offtake agreement could win, and none is scheduled. Hafrok believes a first support award there is unlikely before
2029 Q3, and counts from then. This is Hafrok's judgment, not a fact on the record — what it rests on: Sweden market page. The permits are not affected; winners typically reach final investment decision about 2 years after an award (2031 Q3), then build time on top gives 2034 Q3. The milestone timing is already later than that, so it stands.4
Result
Expected commercial operation
2035, likely range 2035–2040 (the middle half of outcomes for similar projects). With no milestone to build from, the earliest credible date is the estimate, with a deliberately wide range.5
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.
6
Chance of delivery — separate from timing
Start from the share of Early Development projects that went on to complete — ≈61%, 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). About three in four early-stage projects with a final outcome went on to operate — a record from an easier era. Most of today's early pipeline is still unresolved, so the estimate discounts it. Then adjust for this project's own evidence — offtake, market, size, technical complexity — to ≈49%, which rates it
Prospective on Hafrok's four-step delivery scale (Delivering · Expected · Prospective · Fragile).Project timeline verified milestones only — each date carries its provenance mark
Dashed tick marks today (9 Sep 2026). The ▲ below the spine is the developer-announced COD.
Revenue & offtake route to market — open
No offtake secured — route to market open
The routes describe what exists in this market — not a prediction of which the project will take. Timing math for the auction gate lives in the delivery outlook above.
Installation how the build is going · from satellite counts and Hafrok’s registers
Installation not started
nothing to count yet: the satellite tracker begins when offshore construction does
Installation · on record
StageEarly Development
Offshore constructionnot started
Expected start of operation2031
Sources & verification
4/11 fields verified · rests on 10 sources (2 primary) · ◆ 2 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.
Operator3
[2]
Skyborn Renewables2023-09-14
“Skyborn Renewables has received the environmental permit from the Swedish Land and Environment Court to build the Storgrundet Offshore wind farm … The permit allows to install a maximum of 51 wind tur…”
supportsTotal capacity
[6]
Skyborn Renewables2026-06-15◆ Storgrundet Offshore Wind Park Sweden
“Permit granted September 2023; subsequently appealed. In May 2024, the Environmental Court of Appeal annulled the decision and remitted the case for reconsideration alongside a competing project in Gä…”
supportsStatusConnection point
[10]
Trade press6
[3]
offshoreWIND.biz2023-09-14
Press report — cited, not quoted; read it at the source link.
supportsTotal capacity
[4]
Gefle Dagblad2024-05-03◆ Beslut om vindkraft rivs upp – Utposten …
“Mark- och miljööverdomstolen [has] rivit upp [set aside] Storgrundets vindkraftbeslut … Utposten 2 och Storgrundet måste samköras [must be jointly assessed].”
supportsConsentSite rights
[9]
Power Technology2025
Press report — cited, not quoted; read it at the source link.
supportsoperator
[11]
[12]
[13]
Unverified import1
[1]
unknown
Press report — cited, not quoted; read it at the source link.
supportsCommercial operationTotal capacityWater depthDistance from shoreCoordinates