Case Study

Delivering Scotland’s First Grid-Scale Battery Storage System

How strategic partnership and technical expertise launched Scotland's battery energy storage market

February 2023. EEL Power's 50MW battery storage project in Dundee represented a significant milestone – Scotland's first grid-scale battery energy storage system. The project required a reliable contractor capable of delivering this pioneering infrastructure to the highest technical standards.

eelpower bess in dundee

The strategic importance: This project would establish the technical and commercial viability of battery storage in Scotland, potentially opening the market for future developments across the country.

The technical challenge: Integrating 50MW of battery storage technology with the Scottish grid required specialist electrical expertise, complex cable installations, and seamless coordination with SSE for final energisation.

The business imperative: Successful delivery would validate Eel power's investment strategy and demonstrate Scotland's readiness for large-scale energy storage deployment.

When Eelpower needed to transition from their original electrical contractor to a principal contractor for complete project delivery, they selected Ener-G Services based on our proven on-site performance and technical capability.

Why Eelpower chose our partnership:

  • Demonstrated capability – Already successfully delivering electrical works on-site
  • Technical expertise – Proven experience with complex electrical installations
  • Flexible approach – Ability to scale up from subcontractor to principal contractor role
  • Local presence – Scottish-based team with immediate availability
  • Transparent communication – Clear, honest assessment of project requirements and capabilities

Our value proposition: Apply our electrical expertise across the complete project scope while maintaining the quality and timeline standards already established.

Technical Scope: Taking on the principal contractor role, we managed all aspects of the 50MW battery storage installation:

Electrical Infrastructure:

  • Cable installation – Over 33,000 metres of multi-voltage cables across the site
  • System integration – Connecting battery storage technology with grid infrastructure
  • Testing and commissioning – Comprehensive verification of all electrical systems
  • Grid connection – Coordination with SSE for final energisation and grid integration

Project Management:

  • Civil works coordination – Managing foundation and infrastructure requirements
  • SCADA implementation – Control and monitoring systems installation
  • Safety management – Maintaining excellent safety standards throughout delivery
  • Quality assurance – Ensuring all work met British Standards and DNO requirements

 

Technical Innovation: Working with Chinese battery technology required developing comprehensive integration protocols:

  • Standards alignment – Ensuring equipment compliance with British Standards
  • Safety protocols – Addressing different manufacturing and safety approaches
  • Installation procedures – Developing effective methods for complex equipment integration
  • Testing regimes – Comprehensive commissioning procedures for new technology

 

Delivery Results:

  • Scotland's first – Grid-scale battery storage system successfully operational
  • 50MW capacity – Full power output capability serving approximately 70,000 homes
  • Timeline achievement – Project completed in February 2023 as scheduled
  • Technical excellence – All systems commissioned and performing to specification
  • Safety success – Zero incidents throughout the construction phase

Performance Validation:

  • Operational reliability – System achieving nearly 100% uptime since completion
  • Grid integration – Seamless connection with SSE network infrastructure
  • Technical standards – All British Standards and DNO requirements exceeded
  • Client satisfaction – Positive feedback on delivery quality and professionalism

 

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Client Testimonial:

We received excellent service delivering our first asset on time and within budget. The system has performed reliably with no issues since completion.

Mark Simon
CEO, Eelpower

This project established important precedents for Scotland's energy storage sector:

Technical Precedents:

  • Grid integration standards – Established protocols for battery storage connection
  • Installation methodologies – Proven approaches for large-scale deployment
  • Safety frameworks – Comprehensive procedures for complex technology integration
  • Quality benchmarks – Performance standards for future projects

Market Development:

  • Commercial viability – Demonstrated successful business model for battery storage
  • Technical confidence – Proved technology reliability in Scottish conditions
  • Regulatory framework – Established working relationships with grid operators
  • Industry capability – Demonstrated local contractor expertise for future projects

Strategic Value for Eelpower:

  • First-mover advantage – Established market position in emerging sector
  • Technical validation – Proven approach supporting future developments
  • Operational excellence – Reliable asset performance supporting investment returns
  • Market confidence – Success enabling expansion across additional sites

Current Status: The Dundee facility continues to operate successfully, with our team providing ongoing maintenance and technical support to ensure optimal performance.

Continuing Services:

  • Maintenance programmes – Regular inspection and preventive maintenance
  • Technical support – Rapid response for any operational requirements
  • Performance monitoring – Ongoing system optimisation and reporting
  • Expansion planning – Technical expertise supporting future project development

Long-term Partnership: Our successful delivery of Scotland's first battery storage system has led to continued collaboration with Eelpower on subsequent projects, building a comprehensive portfolio of energy storage assets across Scotland.

The successful delivery of Scotland's first grid-scale battery storage system has established proven methodologies and technical expertise that can be applied to future energy storage developments.

What This Means for Energy Storage Developers:

  • Proven delivery capability – Demonstrated success with complex, first-of-kind projects
  • Technical expertise – Established knowledge of grid-scale battery storage requirements
  • Regulatory experience – Understanding of approval processes and grid connection requirements
  • Quality standards – Proven approach to delivering reliable, high-performance systems
  • Local knowledge – Scottish-based expertise with established relationships

The Value of Proven Experience: When developing your energy storage projects, you need partners who have successfully delivered similar infrastructure and can apply proven methodologies to ensure reliable outcomes.

 

  • Scale: 50MW Battery Energy Storage System
  • Significance: Scotland's first grid-scale battery storage facility
  • Timeline: 8 months total delivery (including contractor transition)
  • Technical scope: 33,000+ metres of cable installation and system integration
  • Performance: Nearly 100% uptime since February 2023 completion
  • Standards: Full British Standards compliance and DNO requirements
  • Location: Dundee, Scotland (urban grid connection)
  • Client: Eelpower (Private Equity Backed)
  • Market impact: Established Scotland's battery storage sector

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