Bess Delivery & Service Engineer – Utility Scale Projects - Longi Solar

The BESS Delivery & Service Engineer (Utility Scale) is responsible for the execution and lifecycle support of large-scale battery energy storage projects after the project is secured by the sales and presales teams.

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The role manages the technical delivery, commissioning, and operational & maintenance support of utility-scale BESS projects, working closely with EPC contractors, grid operators, and project stakeholders.

Key Responsibilities
1. Project Handover from Sales / Presales

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• Take over BESS projects from the sales and presales teams after contract signing.
  
• Review technical proposals, system configurations, and service scope.
  
• Confirm system design and project requirements with internal teams and customers including: System design, Grid requirements, Performance guarantees, Project schedules，etc
  
• Ensure project milestones are achieved according to schedule and budget.
  

2. Project Commissioning Planning and Execution

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• Manage the full lifecycle delivery of utility-scale BESS projects.
  
• Coordinate with EPC contractors, integrators, and equipment suppliers. Guide EPC for the equipment unloading, installation etc.
  
• Ensure compliance with technical specifications, grid requirements, and safety standards.
  
• Develop and execute commissioning plans, procedures, and checklists for BESS projects.
  
• Conduct commissioning for battery racks, BMS (Battery Management System), PCS (Power Conversion System), EMS (Energy Management System) and MV transformer.
  
• Validate integration of electrical, control, and communication systems.
  
• Conduct grid compliance and performance verification tests
  
• Work with grid operators and technical partners to complete system integration and SAT.
  
• Work with technical support teams to resolve technical issues during commissioning.
  
• Ensure successful handover to operations.
  

4. Operations & Maintenance Service Management

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• Carry out preventive and corrective maintenance on BESS/PCS/EMS
  
• Perform remote operations to support maintenance and fault resolution
  
• Conduct site inspections, diagnostics, and testing using specialist equipment
  
• Ensure strict compliance with Health & Safety standards and HSE regulations in related countries
  
• Supervise subcontractors and ensure quality and compliance of third-party works
  
• Support commissioning, upgrades, and major repairs
  
• Review technical documentation and contribute to maintenance procedures, RAMS, and method statements
  
• Liaise with OEMs and suppliers on maintenance processes and technical clarifications
  
• Support annual maintenance planning for BESS assets
  
• Provide O&M Training to customer O&M team and subcontractor
  

Qualifications

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• Degree in Electrical Engineering, Power Systems, Energy Engineering, or related field.
  
• 2–5 years’ experience in utility-scale renewable energy or power infrastructure projects. xqbhyrx
  
• Necessary Certifications to work on site
  
• Experience with large-scale BESS, solar + storage, or grid infrastructure preferred.
  
• Strong understanding of Grid integration, Power systems, Energy management systems, High-voltage systems, HSE
  

Skills

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• Strong technical knowledge of BESS, LV systems, inverters, EMS
  
• Knowledge of grid compliance and power system integration
  
• Ability to manage multiple technical stakeholders
  
• Strong problem-solving ability
  
• Willingness to travel to project sites
  

BESS Delivery & Service Engineer – Utility Scale Projects - LONGi Solar madrid, es

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