Drax wins 434MW in T-4 Capacity Market for 2029/30: what it means
Drax has provisionally secured Capacity Market agreements totalling 434MW (de-rated 399MW) for the delivery year October 2029 to September 2030. The clearing price came in at £27/kW/year, which Drax says should translate to around £11 million of income in that period.
These new agreements are for existing assets – chiefly its pumped storage and hydro portfolio – and sit on top of contracts that already run through to September 2029. In short: another year of contracted, predictable revenue for assets that keep the lights on when the system is tight.
Key numbers from the RNS
| Item | Figure | Notes |
|---|---|---|
| Total capacity secured | 434MW | Nameplate capacity |
| De-rated capacity | 399MW | Adjusted for expected availability |
| Delivery period | Oct 2029 – Sep 2030 | T-4 2029/30 auction |
| Provisional clearing price | £27/kW/year | Indexed to UK CPI prior to Delivery Year |
| Expected income | ~£11 million | For the 2029/30 delivery year |
What exactly is the Capacity Market – and why it pays £27/kW/year
The Capacity Market is the UK’s mechanism for paying power assets to be available at peak times. Think of it as a retainer fee for reliability: you get paid per kilowatt of dependable capacity you promise to deliver if the grid needs it. If you’re called and don’t deliver, there are penalties.
The £27/kW/year here is the auction clearing price for 2029/30. It’s described as a “real” price that will be indexed to UK CPI before the delivery year, so the nominal payment in 2029/30 may differ depending on inflation. The key point for investors: this is contracted, largely inflation-protected revenue on top of whatever these assets earn in the wholesale and ancillary services markets.
De-rated 399MW: the metric the money is paid on
“De-rated” capacity is the amount adjusted for how dependable a technology is expected to be at peak. A pumped storage unit, for example, won’t be credited for 100% of its nameplate because real-world availability and constraints are factored in. The auction pays on this de-rated figure, not the raw 434MW headline number.
For Drax, that means the payments are based on 399MW. It’s a sensible, industry-standard way of making sure the system pays for reliable megawatts, not just the biggest numbers on paper.
Which Drax assets are covered?
Drax lists the following:
- Cruachan Pumped Storage (units 1 and 2)
- Lanark and Galloway hydro schemes: Bonnington, Carsfad, Drumjohn, Earlstoun, Kendoon, Stonebyres, Tongland
- Three small legacy gas turbines at Drax Power Station
This is a classic flexibility portfolio: fast-acting, dispatchable assets that can respond when demand spikes or when intermittent renewable generation dips. Securing CM payments for these assets is very much the point of the scheme.
Revenue impact: steady, not splashy
£11 million for the 2029/30 year is helpful, but it’s not transformational for a company of Drax’s size. I’d call it steady and sensible – another layer of predictable cash flow that helps underpin returns from these strategic assets.
Importantly, the auction price is indexed to CPI before the delivery year. While Drax quotes “around £11 million” today, the ultimate nominal revenue could move with inflation by the time we hit 2029/30. Either way, this improves visibility on medium-term earnings from the hydro and pumped storage fleet.
Why this matters for investors
Visibility and resilience into 2030
These contracts extend the run of secured Capacity Market income by an extra year beyond the existing agreements that already stretch to September 2029. Investors like visibility, and this adds it for proven, strategic assets.
System value recognition
The CM awards are a signal that the system values rapid-response capacity. For pumped storage and hydro, which can provide critical balancing services, that recognition comes through in contracted payments rather than relying solely on volatile spot markets.
Inflation linkage provides a hedge
Indexation to UK CPI prior to the delivery year gives a degree of inflation protection. In a world where costs can move, having revenue that adjusts with CPI is a plus.
Balanced take: positives and watch-fors
- Positive – Contracted cash flow: £11 million of largely inflation-linked revenue for 2029/30 from existing assets.
- Positive – Portfolio fit: Awards are focused on pumped storage and hydro, which are well-suited to reliability contracts.
- Positive – Continuity: On top of agreements already running to September 2029, this smooths the revenue profile into 2030.
- Watch-for – Provisional status: The RNS is clear these are provisional auction results. Final confirmations typically follow after the formal processes complete.
- Neutral – Scale: Useful income but not a needle-mover on its own. The strategic value lies in stability and system positioning.
What’s not disclosed
- No breakdown of income by asset – only the total “around £11 million”.
- No mention of any new-build capacity – this is explicitly for existing assets.
- No details on penalties, testing, or performance obligations – standard for a brief CM RNS.
My view: a tidy, low-drama win that underlines Drax’s role in reliability
This is a straightforward, positive update. Drax has done what it should do with these assets: lock in dependable revenue for being there when the grid needs it. The number won’t shock the market, but it will reassure it.
For retail investors, the takeaway is simple. Drax’s pumped storage and hydro units continue to earn their keep through contracts that value reliability. £11 million more in 2029/30 adds to earnings visibility, and CPI indexation is a welcome hedge. Tick, tick, tick.
