UK government refuses to clarify energy storage de-rating despite ‘imminent’ decision

LinkedIn
Twitter
Reddit
Facebook
Email

The UK government’s Department of Business, Energy and Industrial Strategy (BEIS) has refused to provide any clarity over when a decision on the potential de-rating of energy storage assets within the capacity market (CM) will be made despite a senior policy advisor stating the judgement is “imminent”.

In July BEIS proposed significant changes to how their generation classes are de-rated within the CM, the mechanism by which generation assets are paid to ensure Britain’s electricity supplies are reliable, suggesting that the majority of storage assets could lose their current 96% de-rating status in place of a mechanism designed to reflect the discharge duration of assets in the instance of a stress event.

With the exception of a methodology update in September, no further notices have been issued. Since this time, storage developers have entered their projects into pre-qualification for the next CM auctions scheduled for January/February 2018, with no knowledge of whether their applications will be affected by the rule change.

Speaking at Tuesday’s Solar Trade Association (STA) Market Access and Systems Integration conference, senior advisor for smart energy at BEIS, Alexander Berland told our UK sister site Clean Energy News (CEN) the decision would soon be forthcoming.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

“A publication is imminent; we are expecting a decision on that to be very soon. We do want to give clarity as soon as we possibly can as important decisions on investment are relying on that,” Berland said.

He added that this information had come from the government’s security of supply team who govern the CM.

When asked to elaborate today on Berland’s comments, BEIS refused to clarify when this “imminent” publication would be issued, adding only that the department “will be publishing in due course”. The department would not be drawn on if this would be before the T-1 auction to be held 30 January or the T-4 auction on 6 February.

A number of developers have expressed concern that the rules may be implemented ahead of these dates, severely impacting the business case used to build their applications.

One developer that submitted at least two projects into CM pre-qualification told CEN in September that to do so would “lack common sense”, as it would see a number of projects likely pulled from the CM at a time when government has expressed its intention to promote energy storage.

Speaking at the STA event, Katherine Vinnicombe, energy storage investment manager for Foresight Group, called on BEIS to show its hand on de-rating as it would allow investment decisions to be properly considered for future projects.

13 October 2026
London, UK
Now in its second edition, the Summit provides a dedicated platform for UK & Ireland’s BESS community to share practical insights on performance, degradation, safety, market design and optimisation strategies. As storage deployment accelerates towards 2030 targets, attendees gain the tools needed to enhance returns and operate resilient, efficient assets.

Read Next

August 11, 2026
Australia’s framework governing the energy obligations of large data centres advanced on multiple fronts last week.
Premium
August 11, 2026
What led Field to submitting, and winning, 16- to 18-hour BESS projects in the UK’s long-duration energy storage (LDES) cap-and-floor scheme, and what are the next steps? We hear from the firm’s technical director.
August 5, 2026
July was a busy month for large-scale battery storage activity in the UK, with Engie commissioning a system, Masdar and Fidra hitting financial close on projects, Eku Energy buying one, project consents for Aura Power and Starlight Energy, and more.
August 4, 2026
Massachusetts’s Department of Energy Resources (DOER) has issued a request for proposals (RFP) for 1,000MW of energy storage in the US state.
Premium
August 4, 2026
ESN Premium speaks with Fluence’s Jeff Monday and Sam Markham on the opportunity battery energy storage could provide data centres in Australia.