Full-time | Italy, Spain | Technical EuropePosition SummaryThe Technical Service Engineer BESS is responsible for the on-site installation support, commissioning, grid connection, and after-sales technical service of Battery Energy Storage System (BESS) projects across South Europe.The role acts as the primary on-site technical representative, ensuring safe, timely, and high-quality project delivery from installation through commissioning, acceptance, and post-installation support.
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The Technical Service Engineer collaborates closely with customers, EPCs, subcontractors, and internal technical teams to resolve technical issues, ensure compliance with local grid and safety requirements, and deliver an excellent customer experience throughout the project lifecycle.Reporting LineReports to: Team Lead Technical Services BESSMajor ResponsibilitiesSite Delivery & CommissioningProvide on-site technical support during installation, commissioning, testing, and handover of Battery Energy Storage System (BESS) projects.Supervise installation activities and verify compliance with technical specifications, quality standards, and safety requirements.Perform system commissioning, functional testing, and grid connection activities to ensure successful project energization.Resolve on-site technical issues related to electrical installation, system integration, and grid compliance.Support project acceptance, punch-list resolution, and final technical handover to customers.After-Sales Technical SupportRespond promptly to customer technical enquiries via remote or on-site support and ensure timely issue resolution.Troubleshoot hardware, software, communication, and system performance issues, escalating complex cases where appropriate.Manage after-sales service activities through the service management system, ensuring accurate documentation and timely closure of work orders.Coordinate with engineering, product,



and technical support teams to resolve technical issues efficiently.Coordinate with Sales teams to ensure effective customer communication and high customer satisfaction.Customer Support & TrainingDeliver customer training on system operation, routine maintenance, and safety procedures.Build positive customer relationships through professional technical support and effective communication.Handle customer complaints professionally and coordinate appropriate corrective actions to maintain customer satisfaction.Collect and communicate customer feedback, technical issues, and field observations to support product improvements.Maintain technical knowledge of BESS products, system architecture, and commissioning procedures.Support spare parts inventory management and ensure service tools are properly maintained.Performance IndicatorsResponse time to customer service requestsMean Time to Repair (MTTR)On-time commissioning and project handoverTechnical quality of commissioning and documentationCustomer satisfaction with field service supportCompliance with EHS and site safety requirementsAccuracy and timeliness of service documentationRequired QualificationsBachelor's degree or technical qualification in Electrical Engineering, Power Engineering, Renewable Energy, Electronics, Mechatronics, or a related technical discipline.Minimum 2-6 years of experience in field service, commissioning, site engineering, or technical support within BESS, PV, power systems, electrical infrastructure, or a related industry.Strong understanding of electrical systems, inverters, Battery Energy Storage Systems (BESS), or power conversion equipment.Experience with electrical installation, commissioning, and troubleshooting.Ability to interpret electrical drawings, wiring diagrams,



and single-line schematics.Knowledge of grid connection requirements and electrical safety standards is preferred.Experience working on utility-scale or commercial renewable energy projects is an advantage.Relevant local language: C1 (professional working proficiency).
English: B2 (full professional capability).
Valid driver's license.Strong technical troubleshooting and diagnostic skillsPractical understanding of electrical systems and commissioning processesStructured, detail-oriented, and safety-focused working styleStrong customer service and communication skillsAbility to work independently under demanding site conditionsStrong problem-solving and decision-making capabilityCross-functional collaboration and stakeholder management skillsHigh level of adaptability and willingness to travel extensivelyTravel RequirementVery frequent travel across South Europe (estimated ?50% of working time).
Extended periods at customer sites are expected.About JAJA Solar was founded in **** and is a leading global manufacturer of high-performance photovoltaic products.
With 14 production sites, more than 20 subsidiaries and over 37,000 employees worldwide, JA Solar is one of the world's largest solar module manufacturers.
The company's business includes module, wafer and cell production as well as the construction of solar power plants.JA Solar is listed on the Shenzhen Stock Exchange in China and has been included in the Fortune China 500 and Global Top 500 New Energy Enterprises for several consecutive years.JA Solar is an equal opportunity employer and we encourage applications from all qualified individuals.By submitting your application, you declare that your application data will be saved at JA Solar GmbH, and only for internal purposes in the context of the upcoming application process.
If there is no employment, the data will be deleted after six months.
The application data are treated confidentially in accordance with the provisions of the Federal Data Protection Act and are not passed on to third parties.
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📌 Technical Service Engineer Bess (D/F/M) (Lazio)
🏢 JA Europe
📍 Lazio