UK Electricity Capacity Regulations 2014: A Guide for Storage and Solar

Key Takeaways

• The UK Capacity Market is established by the Energy Act 2013.
• Its framework is detailed in "The Electricity Capacity Regulations 2014" (S.I. 2014 No. 2043).
• National Grid ESO acts as the "Delivery Body" for prequalification.
• Non-delivery during stress events incurs charges subject to an "annual penalty cap".

Understanding the UK Electricity Capacity Regulations 2014

The UK's electricity supply security relies on a framework established by the Energy Act 2013. This Act underpins the Capacity Market (CM) mechanism. The specific legal instrument governing this mechanism is "The Electricity Capacity Regulations 2014", officially cited as S.I. 2014 No. 2043. These regulations define how electricity capacity is secured in Great Britain.

Key Roles and Responsibilities

The Capacity Market involves several key administrative bodies. National Grid ESO serves as the "Delivery Body". Its responsibilities include making "prequalification decision" for assets wishing to participate. The "Settlement Body" is responsible for the administration of payments related to capacity agreements.

Capacity Market Auctions

The regulations outline the process for securing future electricity capacity through auctions. These include the "T-4 auction", which procures capacity four years in advance. They also include the "T-1 auction", which procures capacity one year ahead. These auctions aim to ensure sufficient generation and demand-side response capacity is available.

Participation of Battery Storage and Solar Assets

Battery energy storage systems (BESS) and co-located solar-plus-storage assets participate in CM auctions. Their participation is subject to duration-specific de-rating factors. Successful bidders receive steady capacity payments. This is in exchange for delivering scheduled output during System Stress Events.

Capacity Agreements and Obligations

Participants who secure a contract enter into a "capacity agreement". This agreement outlines their obligations. These obligations include delivering power when the system is under stress. The regulations also reference "the Balancing and Settlement Code" for operational and financial settlement processes.

Penalties for Non-Delivery

Failure to deliver contracted capacity during System Stress Events triggers penalty charges. These charges are calculated on a per-MWh basis. The regulations specify a statutory "annual penalty cap" on these charges. This ensures financial liabilities are limited. The **"Secretary of State" holds authority over aspects of these regulations. The **"auction clearing price" determines the payment rate for successful capacity bids.

Further Information

We have not verified specific de-rating factors for different asset types, so we do not publish them here. For detailed statutory text, you can refer to the official legislation.gov.uk website.