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Field Engineer BESS

Job in Oxford, Oxfordshire, OX1, England, UK
Listing for: Iwell
Full Time position
Listed on 2026-10-18
Job specializations:
  • Trades / Skilled Labor
    Field/Service Technician
Salary/Wage Range or Industry Benchmark: 50000 - 70000 GBP Yearly GBP 50000.00 70000.00 YEAR
Job Description & How to Apply Below
Position: Field Engineer BESS )
Role
- Field Engineer BESS (UK) Company - iwell
- Harmonizing Clean Energy Location
- Oxford, UK (field & home based, travelling to customer sites across the UK) About iwell

At iwell, we are fully committed to greater energy security. We help businesses across Europe and the UK become more energy independent. With grid connection queues, volatile energy prices and growing pressure to decarbonise, UK businesses need to be resilient. It's time to take control and think ahead.

We deliver energy management solutions that keep businesses in control of their energy at all times. Our self-developed EMS and modular battery storage create profit through sustainability, making businesses future-proof.

We are a fast-growing international team of driven, talented people, with our headquarters in the Netherlands and a growing team in the UK based in Oxford. From Field Engineers and Software Developers to creative thinkers and customer-focused business developers. Whatever your strong point is, we're always looking for people who are determined to make a positive impact.

The role

As Field Engineer BESS (UK), you are iwell's technical presence on UK sites. You are responsible for technically executing the installation, commissioning and maintenance of our battery systems for UK business customers. You are part of our Field Operations team, which has been installing and maintaining battery systems for years in the Netherlands, Belgium, Germany and the UK, and you play a key role in building up our field capability in the UK.

During installations, you work closely with the UK Technical Project Manager, UK installation partners, and customers' site teams to deliver quality and ensure every system is installed, commissioned and certified in line with UK standards. You also make sure our growing UK fleet of battery systems is carefully maintained. By working safely and accurately, you provide the best service available in the UK BESS market.

What

you will do
  • Install and commission small (from 261 kWh) and large (from 5 MWh) battery systems for business customers across the UK
  • Support technicians from UK installation partners during installation and commissioning, acting as iwell’s technical lead on site.
  • Carry out inspection and testing and complete electrical certification in line with BS 7671 (IET Wiring Regulations), and support G99 grid-connection commissioning and witness testing with the DNO
  • Work to UK health & safety requirements on site, including CDM 2015, RAMS and permit-to-work procedures
  • Perform preventative and corrective maintenance on existing battery systems
  • On-call availability for corrective maintenance on business-critical battery systems
    - Hours to be defined.
  • Work closely with other teams within iwell, both in the UK and at HQ in the Netherlands (Customer Operations, Battery Systems, Software), to deliver the best service to our customers
  • Continuously improve working practices and help build the UK field team as our UK business grows
What we are looking for
  • You are a qualified electrician (NVQ Level 3 or equivalent, ideally JIB Approved Electrician) with a minimum of 5 years' experience in commercial battery storage, solar PV, EV charging or a comparable field
  • You hold the 18th Edition (BS 7671) and an Inspection & Testing qualification (e.g. City & Guilds 2391) plus an ECS/CSCS card, or are willing to obtain these at very short notice
  • Experience in controls and associated protocols such as Mod Bus and MQTT
  • Experience in networking and I.T/LAN connectivity and addressing
  • Experience with G99 commissioning, LV/HV switching, the IET Code of Practice for Electrical Energy Storage Systems
  • SSSTS/SMSTS is a strong plus
  • You are keen to learn how to fully install and maintain our current and future battery systems
  • Y…
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