Solar & BESS Engineer
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 sustain our continuous growth, we are looking for a Solar & BESS Energy Engineer. You will be working with our team of experts from our headquarters in Brussels. Our dynamic team will be your continuous sounding board while you serve the needs of our customers.
Your job will be versatile and require dynamism. One day you will be with your boots on inspecting a construction site, the other day you will be behind your PC screen analysing the expected yield or fine-tuning a PV design.
In a nutshell, your main tasks will be:
- You will perform energy yield calculations, using industry recognised software and internal tools & processes.
- You will analyse the results and produce client reports.
- You will perform technical feasibility studies.
- You will perform site inspections before, during and after construction of projects.
- Over time, you will also start interacting directly with customers.
At first you will work on a project managed by one of your colleagues and gradually you will be taking the role of project manager yourself. You will be working within out EMEA team, which is a combination of Resource Assessment, Due Diligence and Owner's Engineering experts.
Requirements
We are looking for a dynamic colleague who is eager to learn, and who can bring an open and flexible mindset.
- You hold a Master's Degree in Engineering, preferably in Electrical Engineering.
- You have 1-3 years of relevant experience.
- You're highly organised, with excellent technical writing skills.
- You like finding solutions, notice the little details that make a difference, and thrive when handling several projects simultaneously.
- You are confortable working in a dynamic environment and adapting to changing priorities when needed.
- We are looking for a candidate with affinity and interest for everything related to Renewable Energy. You show a strong interest in renewable energies, and this reflects in your way of life.
- You are available for short trips abroad (during the project construction monitoring period - usually for a few days/month). Occasionally we conduct longer-term assignments (couple of weeks) and travelling might be required.
- You are fluent in English (spoken and written)
Bonus points for:
- Knowledge on BESS Design and deployment focus on Li-on technology, PVsyst, AutoCAD, PVCase, etc.
- Eastern European languages are a big plus.
Benefits
Our offices are hidden in the centre of Brussels with a view on a pond, with ducks and a heron bringing a regular visit. In addition to a stimulating atmosphere in a highly motivated group of people, 3E offers a unique opportunity to further develop yourself in a company and in a team with an ambitious growth plan, delivering innovative services.
- Salary package in line with your level of experience, including group insurance, hospital insurance, meal vouchers (9???/day), representation allowance, company mobile phone + subscription, 32 days of vacation and a flex income plan.
- Sustainable transport: easy access with public transport, 100% reimbursement of public transport fare, bicycle allowance.
- Flexibility in our open-minded company, gliding and flexible working hours, where we work from home 2 days per week.
- An international environment: projects in over 100 countries worldwide, colleagues of more than 37 nationalities.
Apply now
Job expired?Please let 3E know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
Apply now
Job expired?Please let 3E know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
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About the role
June 24, 2026
June 24, 2026
Full time
Hybrid
Company
- Brussels, Belgium
1-3 years
UTC+01:00