3E

BESS Senior Engineer

Join 3E in Cape Town as a BESS Senior Engineer, advising on battery tech and system design for renewable projects. Benefit from flexible work, international exposure, and a supportive team driving Africa's energy transition.
3E
3E
Cape Town, South Africa Flexible Full time UTC+02:00

3E

Company Overview

3E (3E NV)

Brussels, Belgium

1999

Approximately 100-150 employees (source: devex.com). No public revenue figures available for 2023 or later.

What They Do

3E focuses on solar energy, wind energy, battery energy storage systems (BESS), sustainable buildings, sites, energy infrastructure, and energy markets. The company offers SaaS platforms and consulting services throughout the entire lifecycle of renewable projects, from development to operation (source: devex.com). Their flagship product, SynaptiQ, is a SaaS platform launched in 2010 that optimizes over 20 GW of connected capacity and provides advice on 90 GW of assets in 2023 (source: 3e.eu). This platform offers performance analytics, proactive monitoring, ROI recommendations, and multi-stakeholder reporting, and is designed for PV, wind, and BESS portfolios.

Projects & Track Record

3E has supported renewable projects in over 40-60 countries with a track record of more than 20 years. A notable project includes optimizing an 800 MW wind portfolio for Renovatio in Eastern Romania through customized measurement campaigns (source: 3e.eu). For Opdenergy in Spain, 3E provided regulatory and technical guidance for hybridizing existing installations with BESS and renewable energy (source: 3e.eu). Ongoing efforts include a partnership with RJE for performance management in Spain and collaborations such as digitizing ReNew Power's 4,100 MW wind/solar portfolio in India via SynaptiQ.

Recent Developments

In 2023, 3E achieved milestones of 20 GW of connected capacity in SynaptiQ and 90 GW of advised assets, and opened an office in Spain (source: 3e.eu). A strategic partnership with BayWa r.e. was announced for global monitoring of PV portfolios using SynaptiQ, focusing on operational excellence across 10 GW of assets (source: baywa-re.com). In 2024-2025, 3E collaborated with TGS on integrating Virtual Met Mast technology into Wind AXIOM for improved wind farm planning.

Working at 3E

3E offers positions in engineering (wind/solar/BESS modeling, system engineering), software/data analysis (development of SynaptiQ, AI solutions), consulting (due diligence, feasibility, project management), and more, with a multidisciplinary team of about 100-150 experts (source: 3e.eu). Active recruitment is taking place at the headquarters in Brussels and at key locations such as Barcelona, Paris, and Cape Town, reflecting the expansions in these regions. The culture emphasizes innovation, international collaboration, and long-term customer relationships, as noted by co-founder/CTO Werner Coppye.


Last updated on Feb 23, 2026 | Report an issue

To strengthen and expand our leading position in renewable energy advisory across Sub-Saharan Africa, we are looking for a Battery and Energy Storage System (BESS) Engineer to join our team based in Cape Town, South Africa.

The core responsabilities are structured around three core pillars:

Technical Expertise

Feasibility

  • Advise clients on the selection of cutting-edge battery technologies
  • Support optimal system sizing, including hybridisation with solar and wind assets
  • Assess technical and financial feasibility of BESS deployments within African markets

Strategy

  • Conduct market and regulatory analyses across Sub-Saharan Africa
  • Identify revenue streams including energy trading, ancillary services, and flexibility markets
  • Support client decision-making through data-driven insights and modelling

Development

  • Support BESS projects from early-stage design through to contracting, construction, and commissioning
  • Contribute to technical specifications, procurement processes, and contractor evaluation

Operation & Performance

  • Provide recommendations to improve system availability, performance, and lifespan
  • Support clients in optimising operational strategies and asset management

Grid Integration

  • Address grid integration challenges specific to emerging and evolving power systems
  • Support the integration of storage solutions into utility and hybrid systems

Growth & Standardization

  • Contribute to the development of 3E's storage offering across Africa.
  • Support the definition of a regional roadmap for BESS services.
  • Develop tools, methodologies, templates, and guidelines to ensure consistent delivery quality.
  • Continuously improve processes based on project experience and regional learning

Training & Knowledge Transfer

  • Mentor and train colleagues on BESS-related topics, ensuring the consistent upskilling of company personnel.
  • Facilitate the exchange of technical knowledge and best practices across all global offices.

Requirements

We are looking for someone who combines technical excellence with a pragmatic, commercially minded approach, and who is eager to contribute to the energy transition in Africa.

  • You hold a Master's degree in Electrical Engineering, Energy Systems or equivalent.
  • You have a solid experience in industry, with a minimum 3-5 years of experience in BESS design and deployment focused on Li-on technology.
  • You have strong Project Management skills and can manage multiple projects simultaneously.
  • You show a strong interest in renewable energies, and this reflects in your way of life.
  • You are analytical, structured and solution-oriented, with strong communication skills.
  • You are curious, proactive and confortable working in dynamic & evolving markets.
  • Your presentation skills are on point and you like participating in group discussions.

Bonus points for:

  • Knowledge of running BESS simulations with specific software or creating sizing tools for this purpose.
  • Experience in the solar energy field.
  • Basic knowledge in programming (Python) is an asset.
  • Fluency in French.

Benefits

  • Salary in line with your level of experience plus laptop, medical aid allowance, phone allowance, 18 leave days (24 after 1 year of service), 13th month (end of year bonus).
  • Flexible working /Home office.
  • An international environment: projects in over 100 countries worldwide, colleagues of more than 37 nationalities.

Apply now

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About the role

June 24, 2026

Full time

Company

June 24, 2026

Flexible

Solar Energy , Wind Energy , Energy Storage

3E

3e.eu

  •  Cape Town, South Africa

3-5 years

UTC+02:00