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.

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)
20%40%60%80%100% 2034: 14.1% (conditional on completion) 2035: 28.0% (conditional on completion) 2036: 22.7% (conditional on completion) 2037: 14.6% (conditional on completion) 2038: 8.7% (conditional on completion) 2039: 5.1% (conditional on completion) 2040: 3.1% (conditional on completion) 2041: 1.8% (conditional on completion) 2042: 1.1% (conditional on completion) 2043: 0.7% (conditional on completion)2026now20282030203120322034203528%EXPECTED2036203820402042 Developer-announced COD: 2031 ANNOUNCED 2031
COD probability by year, conditional on completion
YearProbability
203414.1%
2035 (expected)28.0%
203622.7%
203714.6%
20388.7%
20395.1%
20403.1%
20411.8%
20421.1%
20430.7%
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

2027’28’29’30’31’32’33’34’35Developer-announced COD: 2031 announced COD 2031Commercial operation 2035 ·Hafrok expected
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
VerifiedModelledSourcedInferredConventionUnverifiedNo 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]
Skyborn Renewables2023-09
supportsTotal capacityDistance from shore
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]
Global Energy Monitor2026-07-02
supportsCoordinates
[12]
GEBCO Compilation Group2020
supportsWater depth
[13]
DTU Wind Energy / World Bank (Global Wind Atlas)2026
supportsMean wind speed
Unverified import1
[1]
unknown
Press report — cited, not quoted; read it at the source link.
supportsCommercial operationTotal capacityWater depthDistance from shoreCoordinates