BESS Application Engineer

Larsen & Toubro; Bengaluru; On-site; INR 4,000,000 - 7,000,000; Full time

Job summary

Larsen & Toubro in Bengaluru seeks an Application Engineer for Battery Energy Storage Systems (BESS) to lead technical solution development, system sizing, and proposal support for utility-scale and C&I projects. The role requires strong knowledge of BESS sizing methodologies, grid services, EMS, and project techno‑commercial evaluation.

You will work with Sales, Product Management, Engineering, EPC and Customers to develop optimized BESS solutions, perform energy/power calculations, and deliver

Qualifications

• Bachelor or master in electrical engineering or related field.
• 8+ years in Renewable Energy, Power Electronics, Energy Storage, or Microgrid projects.
• Experience sizing systems from 500 kWh to 500+ MWh BESS projects.
• Exposure to DC-coupled and AC-coupled Solar + BESS architectures.
• Bid support and techno-commercial evaluation for utility tenders.

Responsibilities

• BESS sizing based on customer requirements and use cases.
• Develop technical solutions for Peak Shaving, Load Shifting, DER integration.
• Prepare technical Proposals, SLDs, BOMs, datasheets, and compliance matrices.
• Support sales during customer discussions and present to groups.
• Define system architecture and coordinate with engineering teams.
• Perform energy, power, and financial modelling, including ROI/IRR.

Skills

Analytical thinking

Problem-solving

Customer-facing presentations

Techno-commercial proposal prep

Cross-functional coordination

Excellent communication

Report writing

Education

BE/MTech in Electrical/Electronics/Power Electronics

Tools

String PCS

Central PCS

Job description

Application Engineer – Battery Energy Storage Systems (BESS)

Location:

Bangalore

The Application Engineer – BESS will be responsible for technical solution development, system sizing, proposal support, customer engagement, and application engineering for Utility Scale and Commercial & Industrial (C&I) Battery Energy Storage Systems.

The role requires strong knowledge of BESS sizing methodologies, renewable energy integration, grid services, power conversion systems (PCS), EMS, battery technologies, and project techno‑commercial evaluation.

The engineer will work closely with Sales, Product Management, Engineering, EPC, and Customers to develop optimized BESS solutions for various applications.

Key Responsibilities

BESS Solution Design & Sizing

• Perform BESS sizing based on customer requirements and project use cases.
• Develop technical solutions for:
  • Peak Shaving
  • Load Shifting
  • Demand Charge Management
  • Solar + Storage, Wind + Storage
  • Backup Power
  • Microgrid Applications
  • EV Charging Support
  • Frequency Regulation
  • Grid Ancillary Services
  • Renewable Firming
  • Capacity Firming
  • Energy Arbitrage
  • Black Start Applications
• Perform energy and power calculations considering:
  • Load Profiles
  • Solar/Wind Generation Profiles
  • Battery Degradation
  • Round Trip Efficiency
  • Availability Requirements
  • Future Expansion Requirements
• Understand Grid Code requirements and utility interconnection requirements.
• Analyse customer load data and electricity tariff structures.
• Develop business cases with ROI, IRR, Payback Period, and LCOE analysis.
• Proposal & Customer Support:
  • Support sales teams during customer discussions.
  • Prepare: Technical Proposals, Compliance Matrix, Single Line Diagrams (SLD), System Architecture Drawings, Bill of Materials (BOM), Technical Datasheets.
  • Conduct technical presentations and customer workshops.

System Engineering

• Define system architecture including:
  • Battery Containers
  • PCS/Inverters
  • MV Stations
  • EMS/SCADA
  • HVAC
  • Fire Suppression System
• Coordinate with engineering teams for project execution.

Simulation & Analysis Support

• Perform:
  • Load Flow Studies
  • Energy Yield Analysis
  • Battery Degradation Studies
  • System Efficiency Calculations
  • Financial Modelling
• Support grid interconnection studies where required.

Market & Technology Analysis

• Track industry trends in:
  • Lithium‑Ion Technologies (LFP, NMC)
  • Flow Batteries
  • Grid Forming Inverters
  • Hybrid Renewable Systems
• Benchmark competitor solutions and market offerings.

Power Systems Understanding

• Power System Analysis
• Grid Integration
• Substation Fundamentals
• Protection Coordination
• MV/LV Distribution Systems

Preferred Experience

• B.E./ M.Tech. in Electrical, Electronics, Power Electronics, or related field.
• 8+ years in Renewable Energy, Power Electronics, Energy Storage, Solar EPC, Utility Grid Projects, or Microgrid Solutions.
• Hands‑on experience sizing systems from 500 kWh C&I projects up to 500+ MWh Utility‑scale BESS projects.
• Experience with DC‑coupled and AC‑coupled Solar + BESS architectures.
• Exposure to PCS technologies (String PCS and Central PCS).
• Experience in techno‑commercial evaluation and bid support for utility tenders.

Desired Competencies

• Strong analytical and problem‑solving skills.
• Customer‑facing technical presentation capability.
• Techno‑commercial proposal preparation.
• Cross‑functional coordination.
• Excellent communication and report‑writing skills.