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Battery Storage in the UK Capacity Market

Overview

Battery Energy Storage Systems (BESS) have become increasingly important in the UK's electricity system, providing flexible capacity that can respond rapidly to grid needs. In the capacity market, battery storage competes alongside traditional generation technologies to provide security of supply.

How Battery Storage Works in the Capacity Market

Battery storage systems participate in the capacity market by committing to provide electricity during system stress events. Unlike traditional generators, batteries can:

  • Rapid Response: Discharge electricity within seconds of being called upon
  • Grid Services: Provide frequency response and voltage support
  • Energy Arbitrage: Store cheap electricity and discharge during peak periods
  • Avoid Emissions: Provide clean capacity without direct carbon emissions

Battery Storage Locations in the UK

Battery storage systems are distributed across the UK, with concentrations in areas with good grid connections and suitable planning permissions. View all battery storage facilities in our database.

Major Battery Storage Hubs

  • Thames Estuary: Large-scale developments near London
  • Yorkshire: Co-located with wind farms and industrial areas
  • Scotland: Supporting renewable energy integration
  • Southwest England: Grid reinforcement and renewable support

Battery Technology Types

Lithium-Ion Batteries

The dominant technology for grid-scale storage, offering:

  • High energy density
  • Fast response times
  • Proven reliability
  • Declining costs

Other Technologies

Emerging alternatives include:

  • Flow batteries for longer duration
  • Compressed air energy storage
  • Hydrogen storage systems
  • Gravity-based storage

Key Battery Storage Companies

Leading companies developing battery storage for the capacity market include:

Future of Battery Storage

The role of battery storage in the capacity market is expected to grow significantly:

  • Increasing Capacity: More battery projects securing capacity agreements
  • Longer Duration: 2-4 hour systems becoming standard
  • Grid Services: Combining capacity with ancillary services
  • Renewable Integration: Supporting wind and solar development