Test Engineer - BESS

PeopleStrong; Coimbatore District; On-site; INR 1,200,000 - 2,200,000; Full time

Job summary

DEIC-L&T Precision Engineering & Systems IC in Coimbatore is seeking an experienced testing specialist to validate, test, and commission Battery Energy Storage Systems (BESS) at component, pack, and container levels. You will ensure performance, safety, and adherence to standards.

The role covers validating interfaces among BMS, PCS, EMS, and SCADA, with hands-on lab testing and data analysis. 3–8 years of relevant experience and BE/B.Tech or Diploma are required.

Qualifications

• BE/B.Tech or Diploma in Electrical/Electronics/Mechatronics with relevant experience.
• 3–8 years in BESS, EV, battery, or power electronics testing.
• Experience validating, testing and commissioning battery systems.

Responsibilities

• Develop and execute test plans for battery packs, BMS, PCS, and complete BESS containers.
• Perform electrical, thermal, functional, and safety testing.
• Validate interfaces and test CAN/Modbus/Ethernet protocols.
• Analyze test data and prepare test reports and failure analyses.
• Troubleshoot battery systems and coordinate with design/quality/production.
• Set up test benches, load banks, and automation where possible.

Skills

Lithium-ion batteries

Battery Management System (BMS)

Power electronics

Inverters

Battery cyclers

HV testing equipment

Data acquisition systems

CAN tools

Modbus tools

High voltage safety

Education

BE / B.Tech

Diploma in Electrical / Electronics / Mechatronics

Tools

CAN tools

Modbus tools

Battery cyclers

HV testing equipment

Job description

• DEIC-L&T Precision Engineering & Systems IC
• Coimbatore Campus

Posted On 07 Oct 2026

End Date 05 Apr 2027

Required Experience 3 - 8 years

Knowledge & Posting Location

Testing Products

Bachelor of Engineering (BE) General Diploma

Job Description

Role SummaryResponsible 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

• 1. Testing & ValidationDevelop and execute test plans for:Battery packs (Li-ion, LFP, etc.)BMS (Battery Management System)PCS (Power Conversion System)Complete BESS containersPerform electrical, thermal, functional, and safety testingConduct FAT (Factory Acceptance Test) and SAT (Site Acceptance Test)
• 2. System Integration TestingValidate interfaces between battery, BMS, PCS, EMS, and SCADATest communication protocols (CAN, Modbus, Ethernet)Perform charge-discharge cycle testing and efficiency validation
• 3. Compliance & StandardsEnsure testing as per standards like:IEC / UL / BIS relevant to BESSSupport certification processes and documentation
• 4. Data Analysis & ReportingAnalyze test data and identify performance gapsPrepare detailed test reports and failure analysisSuggest corrective actions and design improvements
• 5. Troubleshooting & Root Cause AnalysisDiagnose issues in battery systems, wiring, control logicWork closely with design, quality, and production teams
• 6. Test Infrastructure SetupDefine and set up test benches, load banks, cyclersSupport automation of testing where applicable

QualificationsB.E / B.Tech / Diploma in Electrical / Electronics / Mechatronics3–8 years experience in BESS, EV, battery, or power electronics testing

Required SkillsStrong understanding of:Lithium-ion batteries & BMSPower electronics & invertersHands-on with:Battery cyclers, HV testing equipmentData acquisition systemsKnowledge of:CAN tools, Modbus toolsSafety practices for high voltage systems