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01 - UNDER CONSTRUCTION
Hams Hall BESS
Client - BW ESS
Location - Birmingham, England
Connection - 400kV
Capacity - 350MW / 1.2GWh
Technology - 248 Sungrow Power Titan 2.0
Energisation - Q3 2026
Hams Hall BESS is a 1.2GWh battery energy storage facility designed to provide large scale grid stability and flexibility within the transmission network. Connected at 400kV, it features a client substation with two 220MVA three-winding supergrid transformers and two interconnected 33kV switchboards for greater resilience which connect 248x Sungrow Power Titan 2.0 units. Upon completion, it be among the largest operational BESS assets in Europe.
Energy-io are the lead designers and architects of this flagship BW ESS project, our team has worked closely with the client to take their concept and provide an end to end detailed design and delivery that starts with the design and build of a 400kV User Bay within the National Grid Hams Hall 400kV Substation which connects the client substation via an 800m 400kV cable system.
Key to the project is the close working relationship with Sungrow, through early technical collaboration and direct engineering interface we act as system integrator between the OEM and the grid, aligning compliance and commissioning through to energisation.
02 - UNDER CONSTRUCTION
Berkswell BESS
Client - BW ESS
Location - Birmingham, England
Connection - 275kV
Capacity - 200MW / 857MWh
Technology - 120 Sungrow Power Titan 3.0
Energisation - Q3 2027
Berkswell BESS is BW ESS' second UK Transmission connected project. Connected at 275kV, it will feature the very latest Sungrow Power Titan 3.0 BESS technology with an incredible 7144kWh in each 20 foot container, providing an impressive MWh per m2 within the site footprint.
Energy-io are proud to continue our working relationship with BW ESS and Sungrow, again delivering end to end design and delivery for the project the same as Hams Hall BESS.
03 - UNDER CONSTRUCTION
Arecleoch Wind Farm Extension
Client - ScottishPower Renewables
Location - South Ayrshire, Scotland
Connection - 33kV Transmission Connected
Capacity - 73MW
Technology - 13x Nordex N149 Turbines
Energisation - Late 2026
Arecleoch Wind Fram Extension is a new thirteen turbine development currently under construction for ScottishPower Renewables, scheduled for energisation in late 2026. The project will feature Nordex N149 turbines and connect via a new 132/33kV AIS substation being constructed by SP Energy Networks.
Energy-io is delivering the electrical balance of plant works across the site, including 33kV infrastructure, substation integration and grid compliance coordination. As with previous SPR projects, our scope consolidates engineering, installation and commissioning leadership to ensure seamless integration between turbine systems, balance of plant assets and the transmission connected network.
04 - UNDER CONSTRUCTION
Lunanhead BESS
Client - Eelpower
Location - Forfar, Scotland
Connection - 33kV Distribution
Capacity - 50MW / 115MWh
Technology - Envision
Energisation - Q2 2027
Camilla is a 50MW battery energy storage facility, connected at 33kV to the SPEN distribution network and delivered on behalf of Eelpower & Nex
Energy-io was engaged during the latter stages of the project to assume full electrical responsibility, refine the existing design and deliver the full electrical balance of
05 - UNDER CONSTRUCTION
Braco BESS
Client - Eelpower
Location - Braco, Scotland
Connection - 33kV Distribution
Capacity - 50MW / 115MWh
Technology - Envision
Energisation - Q2 2027
Camilla is a 50MW battery energy storage facility, connected at 33kV to the SPEN distribution network and delivered on behalf of Eelpower & Next Energy Capital. The asset supports regional grid flexibility and renewable energy integration within the distribution network.
Energy-io was engaged during the latter stages of the project to assume full electrical responsibility, refine the existing design and deliver the full electrical balance of plant works under an accelerated programme. By consolidating engineering, procurement, installation and grid interface coordination within a single delivery team, the 33kV connection and commissioning activities were brought back into alignment, enabling successful energisation in December 2023.
06 - OPERATIONAL
Camilla Farm BESS
Client - Eelpower & NextEnergy Capital
Location - Fife, Scotland
Connection - 33kV Distribution
Capacity - 50MW / 50MWh
Technology - BYD Cube
Energisation - December 2023
Camilla is a 50MW battery energy storage facility, connected at 33kV to the SPEN distribution network and delivered on behalf of Eelpower & Next Energy Capital. The asset supports regional grid flexibility and renewable energy integration within the distribution network.
Energy-io was engaged during the latter stages of the project to assume full electrical responsibility, refine the existing design and deliver the full electrical balance of plant works under an accelerated programme. By consolidating engineering, procurement, installation and grid interface coordination within a single delivery team, the 33kV connection and commissioning activities were brought back into alignment, enabling successful energisation in December 2023.
07 - OPERATIONAL
Hagshaw Hill Wind Farm
Client - ScottishPower Renewables
Location - South Lanarkshire, Scotland
Connection - 33kV Transmission Connection
Capacity - 78MW
Technology - 14x Nordex N149 Turbines
Energisation - April 2025
Hagshaw Hill is a 78MW onshore wind development delivered on behalf of ScottishPower Renewables. The project comprises fourteen 5.6MW Nordex N149 turbines, connected at 33kV via two new SPEN Transmission substations that sit within the customer control building.
Energy-io provided integrated electrical balance of plant delivery, including 33kV infrastructure, substation integration and grid compliance coordination. Working in direct engineering alignment with the turbine manufacturer and network stakeholders , we ensured seamless integration between turbine systems, balance of plant assets and the wider grid through the successful operation.
08 - COMPLETED
Hagshaw Hill 33kV Substation Commissioning Support
Client - SP Energy Networks
Infrastructure - 2x Indoor 33kV Substations
Scope - Commissioning, Protection & Witness Testing
Energy-io was engaged by SP Energy Networks to provide commissioning and testing support across two new indoor 33kV substations. The scope included commissioning and witness testing of the 33kV switchgear panels, protection schemes, battery systems, interface signalling and communications integration.
Working within an accelerated timeframe, Energy-io undertook all commssioning and witness testing activities to align the substations with connection milestones. Leveraging extensive experience within SPEN network environments, we ensured coordinated integration between grid infrastructure and developer assets, supporting successful energisation.
09 - OPERATIONAL
Kilgallioch Wind Farm Extension
Client - ScottishPower Renewables
Location - Dumfries & Galloway, Scotland
Connection - 33kV (Existing Switchboard Extension)
Capacity - 50MW Extension (239MW Existing Site)
Technology - 9x Nordex N149 Turbines
Energisation - December 2025
Kilgallioch Wind Farm Extension is a 50MW expansion comprising nine Nordex N149 turbines, integrated into the existing 239MW operational wind farm in south west Scotland.
Energy-io delivered the electrical balance of plant works, featuring two new 33kV circuits from the existing no.3 switchboard, control room modifications and hybrid control integration between the Nordex turbines and existing Gamesa fleet. Working within a live operational site, we planned and executed multiple controlled outages, undertook all 33kV SAP activities and coordinated commissioning to ensure seamless integration with minimal distruption to ongoing generation.
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Find out more about our past projects & pipeline
Get in touch to discuss how we can help you unlock the full potential of renewable energy, and to chat to us about Camilla, or any of the projects in our pipeline.