Sr BESS Integration Engineer

Job Description:

Sr BESS Integration Engineer

Responsibilities

• Lead the electrical design of BESS and hybrid PV+BESS systems (AC- and DC-coupled), including single-line diagrams, cable sizing, protection coordination, and grounding concepts.

• Specify batteries, PCS/inverters, DC/DC Converters, transformers, switchgear, protection devices, auxiliary systems, and monitoring equipment.

• Ensure compliance with relevant grid codes, protection and safety standards, and internal engineering guidelines.

• Take technical ownership of installation and commissioning of BESS and hybrid systems at test yards and customer sites.

• Develop and execute detailed commissioning procedures, checklists, and test protocols (FAT, SAT, functional and performance tests).

• Perform on-site system start-up, parameterization of BMS/PCS/EMS, and tuning of controls and protection settings.

• Lead troubleshooting activities (controls, communication, protection, performance issues), working closely with field technicians, contractors, and vendors.

• Support O&M teams during the early operation phase, including root-cause analysis and corrective action plans.

• Design and run performance test campaigns for BESS (round-trip efficiency, dynamic response, ramp rates, SoC windows, degradation indicators, etc.) in both AC and DC-coupled architectures.

• Analyze time-series data (field measurements, SCADA data) to compute KPIs, identify anomalies, and propose design or control improvements.

• Prepare technical reports, test summaries, and performance reviews for internal stakeholders, customers, and certification bodies.

• Collaborate with controls and software teams to integrate BMS, PCS, and plant-level controllers (EMS/PPC/SCADA).

• Define and validate control strategies for coordinated operation of PV, BESS, and other assets (e.g., curtailment, power smoothing, power-to-x use cases).

• Define communication interfaces and data points (Modbus/TCP, IEC-104, OPC-UA, etc.) and support SCADA integration and FAT/SAT of communication.

• Contribute to projects involving hydrogen (electrolyzers, fuel cells, H₂ storage) connected to PV/BESS systems.

• Understand the basics of power-to-x concepts (e.g., power-to-hydrogen, power-to-heat, power-to-mobility, power-to-industry loads) and how BESS interacts with these value chains (sizing, operation strategy, constraints).

• Collaborate with R&D and product teams on the development and refinement of energy storage products and solutions (standard system architectures, control strategies, test protocols).

• Support or lead experimental campaigns (lab, test yard, or field pilots) aimed at improving performance, reliability, and cost of BESS and hybrid systems.

• Contribute to the definition of new product concepts for BESS and hybrid plants, feeding back lessons learned from field operation and commissioning.

Qualifications

• Bachelor's degree in Energy, Electrical or Control Engineering (or related).

• 7+ years of experience in power systems, renewable energy, or energy storage projects, with significant hands-on field experience (installation and commissioning) of PV and/or BESS systems.

• Proven experience with:

• Electrical design of LV/MV systems (single-line diagrams, cable sizing, protection coordination, grounding).

• Field commissioning of inverters, protection relays, BESS, PV plants, or similar power systems.

• Operation and troubleshooting of grid-connected systems.

• Solid understanding of:

• Battery technologies (Li-ion and others), BMS, and degradation mechanisms.

• PCS / inverters, transformers, MV/LV distribution and protection schemes.

• Grid interconnection requirements, power quality, and safety practices.

• Experience with PVsyst or similar tools for PV and hybrid PV+BESS simulations.

• Experience with SCADA platforms and industrial automation concepts.

• Data analysis and scripting using Python and/or MATLAB (time-series analysis, KPI calculation, reporting).

• Proficiency with MS Office / Excel for engineering calculations and reporting.

Preferred:

• Master's degree in a relevant area, ideally focused on BESS.

• Knowledge and/or experience with hydrogen systems (electrolyzers, fuel cells, H₂ storage) and their electrical integration.

• Experience with other generation sources such as hydraulic, wind, thermal or cogeneration plants.

• Familiarity with power-to-x applications and their impact on system sizing, load profiles, and operational strategies.

• Experience in R&D or product development related to BESS, PV, hydrogen, or hybrid systems (e.g., prototypes, pilots, testbeds, experimental campaigns).

• (Desirable) Experience in drafting or contributing to patent applications, invention disclosures, or other IP-related documents in the energy sector.

• (Desirable) Track record of technical publications, reports, or standards-related work in energy storage, power systems, or renewable energy.

• (Desirable) Experience with real-time simulation or HIL platforms for testing control strategies.

• (Desirable) Familiarity with version control tools (e.g., Git) and collaborative development workflows.

At Nextpower, we are driving the global energy transition with an integrated clean energy technology platform that combines intelligent structural, electrical, and digital solutions for utility-scale power plants. Our comprehensive portfolio enables faster project delivery, higher performance, and greater reliability, helping our customers capture the full value of solar power. Our talented worldwide teams are redefining how solar power plants are designed, built, and operated every day with smart technology, data-driven insights, and advanced automation. Together, we're building the foundation for the world's next generation of clean energy infrastructure.