Powersystems, high-voltage specialist electrical contractor, is delighted to share that works are progressing well on the design and construction of a new 275 kV substation, including the associated compound and electrical balance of plant works supporting a large-scale Battery Energy Storage System (BESS).
This project represents a significant milestone for Powersystems, encompassing the full design, engineering and construction of a 275 kV substation, providing a critical grid connection to the transmission network and enabling the delivery of essential grid stability services.
Progress Highlights & Key Milestones
- 33 kV switchgear cold commissioning completed, marking a major commissioning milestone
- Above-ground earthing installation well advanced, ensuring compliance with safety and transmission standards
- 33 kV cable terminations completed at the BESS, with remaining switchgear terminations programmed
- Essential and non-essential auxiliary power supplies installed, with distribution boards successfully handed over
- Auxiliary power, communications and fire protection cabling progressing, supporting full system integration
- 275 kV cable installation completed, including erection of temporary structures and scaffolding
- Uplifting of 275 kV cables to steelwork structures completed
- 275 kV busbar installation substantially complete, with final connections programmed
- LV and multicore cabling installation commenced across the wider site
- Grid transformer successfully delivered, representing a critical step towards energisation
Supporting a More Stable, Low-Carbon Grid
The substation and BESS infrastructure under construction will support a 50 MW energy storage facility with a two-hour duration, delivering vital grid stability services through zero-carbon technology. By providing services such as inertia and system support, the development will play a key role in enabling greater penetration of renewable energy while reducing reliance on fossil fuel generation.
Projects of this nature are essential to modernising the UK’s electricity network, ensuring resilience, improving power quality and supporting national decarbonisation objectives. In addition to the environmental benefits, the project is also delivering local economic value through skilled employment and supply-chain engagement during construction.
Notes to Editors:
Contact Information:
- This article is written by Jules Daly, Marketing and Communications Manager at Powersystems.
- Email jules.daly@powersystemsuk.com Telephone 01454 318000
- Photography Copyright please credit all images used to powersystemsuk.co.uk
Powersystems are powering the transition to a sustainable future
Powersystems: The High Voltage Specialist of Choice
Powersystems is a leading employee-owned high voltage electrical engineering specialist with over 49 years of experience delivering safe, efficient, and high-quality infrastructure solutions across the UK.
As the first Lloyd’s NERS-accredited Independent Connection Provider (ICP), we have been delivering contestable grid connections up to 132 kV for over 29 years. Our trusted expertise spans the full project lifecycle—from design and installation to commissioning—supporting clients across renewable energy, utilities, and industrial sectors.
Since 2000, Powersystems has connected over 10 GW of renewable energy to the UK grid, including onshore and offshore wind, solar, hydro, tidal, and battery energy storage systems (BESS). We’ve also delivered critical infrastructure for electric vehicle charging, CHP, STOR, rotating stabilisers, and private wire networks.
Working in partnership with developers, contractors, and DNOs, we’ve connected 30% of the UK’s onshore wind farms—playing a vital role in the transition to Net Zero by 2050.
Our commitment to safety, sustainability, and innovation is embedded in our ISO-accredited integrated management systems and our ‘Priority No.1’ health and safety culture. We continue to invest in people, technology, and partnerships to remain the high voltage specialist of choice.
As an employee-owned business, Powersystems empowers every team member to contribute to our shared success. Our ownership model fosters a culture of collaboration, accountability, and continuous improvement—ensuring we deliver excellence for our clients, safely and efficiently.