RWE has agreed to buy Vattenfall's Norfolk offshore wind zone, three consented projects with 4.2 GW of planned capacity, for $1.22 billion. Five months earlier Vattenfall had stopped work on the largest of them because costs had risen too far. The question is what RWE sees in a portfolio its developer walked away from.
Key takeaways
- RWE signed an agreement on 21 December 2023 to acquire the Norfolk offshore wind portfolio in the UK from Vattenfall at an enterprise value of $1.22 billion, about $0.29 million per MW across 4.2 GW. The deal completed on 27 March 2024.
- The Norfolk zone comprises three fully consented offshore wind projects, Norfolk Boreas, Norfolk Vanguard West and Norfolk Vanguard East, each with a planned capacity of 1.4 GW, located 50 to 80 kilometres off the Norfolk coast in East Anglia.
- Vattenfall stopped work on Norfolk Boreas in July 2023 after a sharp rise in costs, and the sale to RWE allows it to reverse a $537 million impairment charge booked that year.
- Norfolk Boreas secured a 15-year Contract for Difference in 2022 at a strike price of $44.72 per MWh, one of the lowest prices in that UK auction.
- Vattenfall said the majority of RWE's purchase price for the Norfolk zone relates to development expenses already incurred.
Why did Vattenfall stop building Norfolk Boreas?
A Contract for Difference, or CfD, is a UK government contract that guarantees a generator a fixed strike price for its power over 15 years. If the market price is lower, the government pays the difference. If it is higher, the generator pays back. The certainty is valuable, but the price is locked when the contract is won.
Norfolk Boreas won its CfD in 2022 at one of the lowest strike prices in that auction. Costs then rose sharply. A project whose income is fixed and whose costs are not can quickly stop being worth building. Vattenfall halted Boreas in July 2023 and booked a $537 million impairment, an accounting write down of the asset's value.
Leap records that Vattenfall had previously announced the asset would be available to participate in the 2025 allocation round, AR7. That suggests the original low price contract was no longer the route Vattenfall intended to take.
What is RWE paying $1.22 billion for?
RWE is mostly paying for time. After 13 years of development, all three Norfolk projects have seabed rights, grid connections, development consent orders and the other key permits. Those are the slowest and riskiest parts of offshore wind development, and RWE does not have to repeat them.
Vanguard West and Vanguard East are the most advanced. Vattenfall had already procured most of their key components. Vattenfall will keep developing the two Vanguard projects under a transitional services agreement until completion, so work does not stall during the handover.
Vattenfall's own description of the price is telling: the majority relates to expenses spent to date. That means RWE is broadly reimbursing Vattenfall's sunk development costs rather than paying a large premium for the projects' future profits. It is a price set by what was spent, not by what the projects will earn under their current contracts.
RWE will restart Norfolk Boreas and plans to seek CfDs in the upcoming auction round for the two Vanguard projects. All three are expected to be commissioned this decade.
How cheap is $0.29 million per MW for UK offshore wind?
It is cheap only against the wrong comparison. Operating offshore wind farms trade at many times that figure, because they produce cash. Development projects trade at a fraction, because the buyer still carries construction cost, supply chain and auction risk. Norfolk is a late stage development portfolio, and its price belongs in that second group.
Enerdatics records 54 UK offshore wind transactions announced between January 2022 and June 2025, and 16 carry a value that can be expressed per MW. For operational assets, the median is $5.8 million per MW across 12 priced deals. For projects under development, only two of 22 transactions can be priced per MW: RWE's Norfolk purchase and Gulf Energy's 24.99 percent stake in the 1.5 GW Outer Dowsing project in March 2023, which also grosses up to about $0.29 million per MW. Enerdatics understands from Gulf's financial statements that its developer premium on Outer Dowsing was $0.036 million per MW. Two data points at the same level, for very different projects, show how scarce priced UK offshore development deals are.
What does the deal signal for UK offshore wind?
The first signal is that consented capacity is being recycled rather than abandoned. When costs broke the economics of a low price CfD, the projects did not die. They moved to a buyer with the scale and appetite to rebid them into a later auction on better terms.
The second is that RWE is concentrating its UK position. The deal fits RWE's plan to invest $69.7 billion globally between 2024 and 2030 and grow its green portfolio to more than 65 GW by 2030. In the same month RWE agreed to bring Masdar into its Dogger Bank South project, a deal whose price only emerged later in Masdar's accounts. RWE is buying development in one place and selling down equity in another.
The third is that Vattenfall is narrowing, not leaving. It remains a significant offshore developer, as its partnership with BASF on the Nordlicht cluster off Germany shows. The Norfolk sale lets it focus on investments that better fit its portfolio and risk preferences.
The test of RWE's bet is the CfD auction. If the Norfolk projects clear at strike prices that cover today's costs, the $1.22 billion will look like a fair price for 13 years of permitting. If not, RWE will face the same arithmetic that stopped Vattenfall.
Frequently asked questions
Who advised Vattenfall on the Norfolk sale? RBC Capital Markets acted as financial advisor and Watson Farley & Williams as legal advisor to Vattenfall.
What approvals did the RWE Norfolk deal need? Closing was subject to approval by the Crown Estate and regulatory approvals. It was expected in the first quarter of 2024, and the transaction completed on 27 March 2024.
Does Norfolk Boreas still have its CfD? Norfolk Boreas won a 15-year CfD in 2022 at $44.72 per MWh. Vattenfall had previously announced the asset would be available to participate in the 2025 AR7 round, and RWE plans to seek CfDs for the Vanguard projects in the upcoming auction.
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