Battery Senior Engineer/Manager (Grid-Scale BESS - Electrical Focus)

Energy Vault; Petaling Jaya; On-site; MYR 50,000 - 70,000; Full time

Job summary

Energy Vault is seeking a Battery Engineer focused on electrical design for grid-scale Battery Energy Storage Systems. You will be responsible for electrical design, commissioning, and performance monitoring, ensuring integration with solar PV plants. The position requires a degree in Electrical Engineering and expertise in power systems, along with hands-on experience in BESS projects. The engineer will also manage contractors and ensure compliance with grid codes, fostering collaboration with solar PV teams.

Qualifications

• Degree in Electrical Engineering, Power Systems, or Renewable Energy Engineering.
• 3+ years in grid-scale Battery Energy Storage Systems.
• Hands-on experience with Power Conversion Systems and MV switchgear.
• Proficiency in simulation tools.

Responsibilities

• Design and validate electrical architectures for BESS.
• Lead on-site commissioning of BESS systems.
• Develop BESS control strategies for grid services.
• Prepare electrical schematics and technical documentation.

Skills

Electronic design

BESS commissioning

Grid compliance

Renewable energy engineering

Education

Bachelor’s/Master’s in Electrical Engineering

Tools

ETAP

PSCAD

DIgSILENT

PVSyst

Job description

Description

Solarvest, a leader in Malaysia's renewable energy sector, seeks an electrical-focused Battery Engineer to drive the development, deployment, and optimization of grid-scale Battery Energy Storage Systems (BESS). This role is critical for integrating BESS with solar PV plants and ensuring reliable grid support. You will provide technical expertise in electrical design, commissioning, and performance management of BESS projects across Malaysia.

Key Responsibilities

1. BESS Electrical Design & Integration

- Design and validate electrical architectures for grid-scale BESS (DC-coupled, AC-coupled, HV/MV systems).

- Size and specify critical components: *PCS (Power Conversion Systems)*, transformers, switchgear, protection systems, and cabling.

- Ensure compliance with *Malaysian grid codes* (GCP, MS IEC standards) and international norms (IEEE 1547, IEC 62933).

- Model system performance (e.g., using ETAP, PSCAD) for grid stability, fault response, and power quality.

2. Commissioning & Field Execution

- Lead on-site commissioning of BESS systems, including *FAT/SAT (Factory/Site Acceptance Testing)*.

- Troubleshoot electrical issues: grounding, insulation resistance, relay coordination, arc-flash safety.

- Supervise contractor work for electrical installations, ensuring compliance with design specs.

3. Performance Monitoring & Optimization

- Develop BESS control strategies for grid services: *peak shaving, frequency regulation, solar smoothing*.

- Analyze SCADA/EMS data to diagnose efficiency losses, thermal issues, or degradation.

- Optimize system performance for revenue stacking (energy arbitrage, ancillary services).

4. Technical Documentation & Compliance

- Prepare electrical schematics, SLDs, protection coordination studies, and HAZOP reports.

- Ensure adherence to *Suruhanjaya Tenaga (Energy Commission)* regulations and local safety laws.

- Support project permitting and grid interconnection applications.

5. Vendor & Stakeholder Management

- Evaluate BESS integrators, PCS suppliers, and balance-of-plant contractors.

- Collaborate with solar PV teams for hybrid plant design.

- Provide technical support to EPC, O&M, and business development teams.

6. Safety & Reliability

- Implement HV safety protocols (PTW, LOTO) during commissioning/maintenance.

- Conduct root-cause analysis for electrical failures or safety incidents.

- Define maintenance procedures for electrical components.

Requirements

- Degree: Bachelor’s/Master’s in Electrical Engineering, Power Systems, or Renewable Energy Engineering.

- 3+ years in grid-scale BESS, solar PV, or power systems engineering.

- Hands-on experience with PCS (Sungrow, SMA, Tesla, etc.), MV switchgear, protection relays (SEL, ABB).

- Proven track record in BESS commissioning and grid interconnection.

- Experience in renewable energy EPC/projects is highly advantageous.

- Expertise in AC/DC power systems, protection schemes, and grid compliance.

- Proficiency in simulation tools: ETAP, PSCAD, DIgSILENT, PVSyst (BESS mode).

- Knowledge of BMS integration and communication protocols (CAN, Modbus, IEC 61850).

- Familiarity with battery testing (capacity, round-trip efficiency, thermal runaway).

- Strong problem-solving for field electrical issues.

- Ability to manage contractors and cross-functional teams.

- Excellent report writing and presentation skills.

- Experience with containerized BESS and liquid-cooled systems.

- Knowledge of Malaysian ancillary services market and grid-support requirements.

- Certification: TNB CIDB, HV Switching, or similar.

- Familiarity with SCADA/EMS platforms (e.g., PXiSE, POMCUBE).