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.

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
Solid 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

📌 Test Engineer Bess Coimbatore
🏢 Larsen and Toubro
📍 Coimbatore