Test Engineer - BESS

Larsen & Toubro; Coimbatore District; On-site; INR 600,000 - 1,000,000; Full time

Job summary

Larsen & Toubro seeks a testing specialist to validate, test, and commission Battery Energy Storage Systems (BESS) at component, pack, and container levels. Ensure performance, safety, and standards compliance.

Role covers test planning for batteries, BMS, PCS, and complete BESS containers, with hands-on testing of high voltage systems and data acquisition for analysis and reporting.

Qualifications

• Bachelor-level engineering or diploma in Electrical/Electronics/Mechatronics with relevant BESS exposure.
• 3–8 years of experience in BESS, EV, battery or power electronics testing.

Responsibilities

• Validate and test battery systems at component, pack and container levels.
• Develop and execute test plans for BESS components (batteries, BMS, PCS, containers).
• Perform electrical, thermal, functional and safety testing; conduct FAT/SAT.
• Analyze data and prepare test reports; suggest corrective actions and improvements.

Skills

Lithium-ion batteries

BMS

Power electronics

Inverters

Education

B.E./B.Tech./Diploma in Electrical/Electronics/Mechatronics

Tools

Battery cyclers

HV testing equipment

Data acquisition systems

CAN tools

Modbus tools

Job description

Role Summary

Responsible for validation, testing, and commissioning of Battery Energy Storage Systems (BESS) at component, pack, and container level. Ensures system performance, safety, and compliance with applicable standards.

Role Summary

Responsible for validation, testing, and commissioning of Battery Energy Storage Systems (BESS) at component, pack, and container level. Ensures system performance, safety, and compliance with applicable standards.

Key Responsibilities

• Testing & Validation
• Develop and execute test plans for:
  • Battery packs (Li-ion, LFP, etc.)
  • BMS (Battery Management System)
  • PCS (Power Conversion System)
  • Complete BESS containers
• Perform electrical, thermal, functional, and safety testing
• Conduct FAT (Factory Acceptance Test) and SAT (Site Acceptance Test)
• System Integration Testing
• Validate interfaces between battery, BMS, PCS, EMS, and SCADA
• Test communication protocols (CAN, Modbus, Ethernet)
• Perform charge-discharge cycle testing and efficiency validation
• Compliance & Standards
• Ensure testing as per standards like:
  • IEC / UL / BIS relevant to BESS
• Support certification processes and documentation
• Data Analysis & Reporting
• Analyze test data and identify performance gaps
• Prepare detailed test reports and failure analysis
• Suggest corrective actions and design improvements
• Troubleshooting & Root Cause Analysis
• Diagnose issues in battery systems, wiring, control logic
• Work closely with design, quality, and production teams
• Test Infrastructure Setup
• Define and set up test benches, load banks, cyclers
• Support automation of testing where applicable

Qualifications

• B.E / B.Tech / Diploma in Electrical / Electronics / Mechatronics
• 3–8 years experience in BESS, EV, battery, or power electronics testing

Required Skills

• Strong understanding of:
  • Lithium-ion batteries & BMS
  • Power electronics & inverters
• Hands‑on with:
  • Battery cyclers, HV testing equipment
  • Data acquisition systems
• Knowledge of:
  • CAN tools, Modbus tools
  • Safety practices for high voltage systems