BESS Commissioning Engineer (Electrical / MV)

Location: Site-based (UK – travel required)

Job Type: Contract / Freelance / Fixed-term

Rate: Competitive – based on experience

Role Overview

We are seeking an experienced BESS Commissioning Engineer to carry out inspection, installation support, and commissioning activities for large-scale battery energy storage systems. The role involves detailed electrical and mechanical inspections, coordination with system integrators, and ensuring equipment is ready for safe energisation.

This is a hands-on, site-based role suited to engineers with strong experience in electrical power systems, MV equipment, and energy storage installations.

Key Responsibilities

• Carry out equipment arrival inspections and unpacking checks
• Verify grounding, earthing, and insulation resistance compliance
• Support installation of BESS containers, MVS, and auxiliary systems
• Inspect battery PACKs, DC cabinets, PCS and control wiring
• Perform cold commissioning inspections prior to power-on
• Inspect liquid cooling systems, piping, and leak integrity
• Conduct medium-voltage switchgear inspections and checks
• Verify transformer interfaces, sensors, valves, and protection devices
• Ensure all works comply with commissioning checklists and safety standards
• Coordinate with system integrators and site teams during commissioning

Required Experience & Skills

• Proven experience commissioning Battery Energy Storage Systems (BESS)
• Strong electrical background (LV/MV systems)
• Experience with:
• DC battery systems
• PCS / inverters
• MV switchgear and transformers
• Grounding and insulation testing
• Ability to read and verify electrical schematics and wiring diagrams
• Site-based commissioning experience on utility-scale or industrial projects
• Strong attention to detail and safety compliance

Qualifications (Preferred)

• Electrical Engineering qualification or equivalent
• HV / MV authorisation (advantageous)
• ECS / CSCS card
• Experience with containerised energy systems

What We Offer

• Competitive contract rates
• Interesting large-scale energy infrastructure projects
• Opportunity for ongoing commissioning and maintenance work

Pay: £300.00-£550.00 per day

Work Location: On the road