Position Overview 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.

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 * 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 * 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. 3.

Commissioning & Grid Integration * 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 * Provide O&M; service after Commercial Operation Date (COD). * 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 * Degree in Electrical Engineering, Power Systems, Energy Engineering, or related field. * 2–5 years’ experience in utility-scale renewable energy or power infrastructure projects. * 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 * 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 (España)
🏢 Longi Solar
📍 España