- Lead engineering of 1 MW–5 MW+ containerized BESS systems.
- Develop complete BESS architecture from cell to grid connection.
- Design battery module, rack and container configuration.
- Calculate required number of cells, modules and racks for different MWh capacities.
- Develop electrical single-line diagrams and system architecture.
- Select and integrate:
- Battery cells
- Modules and racks
- BMS
- PCS / bidirectional inverter
- EMS
- SCADA
- DC combiner systems
- AC distribution
- Transformers
- Switchgear
- HVAC / liquid cooling
- Fire detection and suppression
- Gas / smoke detection
- Safety and emergency shutdown systems
- Define DC bus voltage, current, string configuration and rack architecture.
- Design battery container layout including rack spacing, cable routing, ventilation and maintenance access.
- Carry out thermal management calculations and cooling-system selection.
- Lead battery protection and electrical safety design.
- Develop BOM for complete BESS containers.
- Evaluate and technically qualify suppliers from India, China, Taiwan and other regions.
- Review supplier drawings, specifications and datasheets.
- Support procurement negotiation and vendor finalization.
- Develop SOPs for:
- Cell inspection
- Module assembly
- Rack assembly
- BMS installation
- HV cabling
- Container integration
- Testing and commissioning
- Establish BESS assembly and testing processes at the Chennai facility.
- Develop Factory Acceptance Test (FAT) and Site Acceptance Test (SAT) procedures.
- Lead commissioning of BESS projects at customer sites.
- Troubleshoot battery, PCS, BMS, EMS and thermal-management issues.
- Lead root-cause analysis for system failures.




- Ensure compliance with applicable IEC, UL, NFPA, BIS and Indian electrical standards.
- Coordinate certification and testing requirements.
- Develop safety procedures for high-voltage battery systems.
- Build and manage the BESS engineering team.
- Train assembly technicians and commissioning engineers.
- Support customer technical discussions, tender submissions and EPC partners.
- Support development of customized BESS solutions for solar, industrial, microgrid, data-center and grid applications.

Preferred ExperienceExperience: 8–15+ years overall engineering experience, with at least 3–5 years directly in BESS / lithium-ion battery / ESS integration. Candidates with direct experience commissioning or designing MW/MWh-scale containerized BESS will be strongly preferred.

Technical Knowledge RequiredStrong knowledge of:

- LFP / Sodium-ion / Lithium-ion battery systems
- Prismatic battery cells
- Battery module and rack design
- High-voltage DC systems
- Battery Management Systems
- PCS / bidirectional inverter
- EMS / SCADA
- CAN / RS485 / Modbus communication
- HV cables, connectors and busbars
- DC contactors and fuses
- MCCB / ACB / switchgear
- Transformers
- HVAC / liquid cooling systems
- Fire suppression systems
- Container mechanical integration
- Grid-connected energy storage
- Battery testing and commissioning
- Electrical drawings and SLD preparation
- BOM development and cost optimization

Standards Knowledge PreferredKnowledge or working experience with:
- IEC 62619
- IEC 62933
- IEC 62477
- IEC 61000
- UL 1973
- UL 9540
- UL 9540A
- NFPA 855
- UN 38.3
- Relevant BIS / CEA / Indian electrical and fi

📌 BESS Engineering Head (Chennai)
🏢 Aatral ESP
📍 Chennai