top of page
OCU-Group-logo_primary-01.jpg

Mauxhall BESS

Project Location:

North Lincolnshire

Client Name:

CSE - Canadian Solar's e-STORAGE

Project Description:

OCU Group was appointed as Sub-EPC contractor to design, build and commission a new 25MW Battery Energy Storage System (BESS) at Mauxhall Farm, adjacent to a recently commissioned solar PV site near Immingham.


The works included full civil, electrical and mechanical infrastructure to support the large-scale BESS installation. Civil works comprised site preparation, drainage, roadways, foundations, earthing and cable management systems. Electrical works included installation of balance-of-plant equipment, cabling and full testing and commissioning.

Key Stats:

  • 25MW / 50MWh BESS

  • 12 × Solbank 3.0 battery containers installed

  • 3 × twin-skid PCS units

  • 1 × single-skid PCS unit

  • Customer substation and auxiliary transformer installation

  • 33kV grid connection infrastructure

16 Months

Duration

Challenge

  • Designing a unique fully bunded site to protect surrounding drainage systems and environment

  • Managing firewater containment requirements for potential emergency scenarios

  • Integrating a waterproof membrane and controlled drainage system across the entire site

  • Constructing the containment system alongside ongoing civil and electrical works

  • Delivering the solution without impacting the overall project programme

Solution

  • Close alignment with OCU’s internal project team, the client, and wider stakeholders

  • Designed and constructed a fully enclosed bunded perimeter system

  • Installed a waterproof membrane across the full site footprint

  • Implemented specialist aggregate backfill for controlled water flow

  • Installed an automated water cut-off valve integrated with site electrical systems

  • Coordinated design development reviews with stakeholders to maintain alignment

  • Delivered progressive assurance and approvals throughout construction

Outcome

  • Fully compliant bunded containment system successfully installed

  • Environmental protection measures integrated into the BESS site design

  • Construction delivered without disruption to the overall project programme

  • Infrastructure completed to support safe operation of the 25MW BESS facility

  • System ready to support renewable energy storage and grid flexibility

bottom of page