BESS Engineer / BESS Manager

Job Summary

The BESS Engineer / Manager will be responsible for energy simulation and optimal sizing, technology selection and vendor evaluation, system design & engineering from conceptual to detailed design engineering stage, and technical support to Business Development (BD) during proposal development. The role ensures delivery of technically robust, compliant, and cost-optimized BESS solutions across utility-scale and C&I projects.

Key Responsibilities

1. Energy Simulation & Optimal BESS Sizing

• Perform energy simulations and operational modeling to determine optimal BESS

MW/MWh configuration.

• Analyze load profiles, renewable generation data, tariffs, grid constraints, and use

cases.

• Define and assess dispatch strategies such as peak shaving, arbitrage, renewable

smoothing, and backup.

• Consider efficiency, degradation, SOC limits, cycling constraints, and lifecycle

performance.

• Prepare techno-economic sizing studies, simulation reports, and

recommendations.

1. Technology Selection & Vendor Evaluation

• Lead technology selection for battery systems, PCS, BMS, EMS, and auxiliary

equipment.

• Perform technical evaluation of BESS and PCS vendors, reviewing:

• o Battery chemistry, architecture, thermal and safety design
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• o PCS topology, efficiency, grid-forming / grid-following capability
• o BMS, EMS, SCADA integration and communication

• Ensure compliance with project specifications, grid codes, IEC / IEEE standards,

and safety norms.

• Compare vendors on performance, degradation assumptions, warranties,

availability, and lifecycle energy throughput.

• Support technical bid evaluation, clarifications, and vendor recommendations.

1. System Design & Engineering (Conceptual to Detailed)

• Develop and review end-to-end BESS system design from conceptual through

detailed engineering.

• Define BESS architecture, electrical ratings, protection philosophy, and grid

interconnection design.

• Prepare / review key engineering deliverables including:

AC & DC Single Line Diagrams (SLDs)

• General Arrangement (GA) drawings
• Cabling, earthing, lightning protection, and protection & control schemes

• Ensure coordination between BMS, PCS, EMS, SCADA, and grid requirements.
• Participate in design reviews, safety and risk assessments, and technical approvals.

1. Support to Business Development (BD) – Proposals

• Provide technical inputs for RFQs, RFPs, and project proposals.
• Develop conceptual designs, system sizing, technical write-ups, and compliance matrices.
• Support costing assumptions, losses, efficiencies, and performance guarantees.
• Participate in customer technical discussions, presentations, and clarifications.

Key Skills & Competencies

• Strong understanding of BESS technology, PCS integration, and power systems
• Experience in energy modeling, system design, and vendor evaluation
• Knowledge of lithium-ion battery behavior, degradation, and safety systems
• Familiarity with IS / IEC / IEEE standards, grid codes, protection systems, and electrical safety standards
• Ability to interpret and review technical vendor documentation
• Strong technical communication and cross-functional coordination skills

Tools & Software

• Energy simulation tools: Python / MATLAB / Homer / Excel-based models (any equivalent)
• Electrical design tools: AutoCAD
• Power system study tools (preferred): ETAP / DigSILENT / PSCAD

Education

• B.E. / in Electrical Engineering (Mandatory)
• in Power Systems / Renewable Energy (Preferred)

Preferred Experience

• Utility-scale or C&I BESS project execution
• Renewable + BESS hybrid systems
• Interaction with global BESS & PCS OEM