BESS On-Site & Field Service Engineer

Longi Solar; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

LONGi Solar seeks an on-site BESS Site & Service Engineer to lead technical execution across installation, commissioning and handover for battery storage projects in Europe. You will coordinate with customers, EPCs, project teams and service partners, ensuring safety and quality on every phase.

The role requires frequent travel, strong troubleshooting, and hands-on interaction with BMS/EMS/SCADA systems, with responsibility for remote and field support and occasional on-call rotations.

Qualifications

• Technical diploma or degree in Electrical Engineering, Electronics, Automation, Energy Systems or related field.
• Experience in BESS, renewable energy, power conversion, commissioning, field service or industrial electrical systems.
• Knowledge of BMS, PCS, EMS, SCADA, PPC/PPM, LV/MV systems and industrial communication networks.
• Strong troubleshooting, problem-solving, customer-facing and stakeholder-coordination skills; ability to work independently on site.
• Availability for frequent travel and regular on-site activities across Europe.
• Availability to participate in service on-call rotations where required.

Responsibilities

• Act as LONGi technical representative on site, supporting and coordinating activities with customers, EPC contractors, subcontractors and Project Management.
• Verify mechanical, electrical, auxiliary and communication-system installation according to approved drawings, technical documentation and procedures; identify and follow up deviations and open points.
• Prepare, coordinate and execute commissioning activities for battery systems, BMS, PCS, EMS, auxiliary systems, communication networks and MV interfaces.
• Support integration between BESS equipment, SCADA, EMS, PPC/PPM and plant control systems, including verification of signals, setpoints, measurements and commands.
• Perform and support capacity tests, Round Trip Efficiency (RTE) tests, functional tests, SAT and other contractual performance verification activities.
• Support commissioning close-out, SAT completion and technical handover of the system to the customer and O&M organization.
• Analyse alarms, logs and operating data; perform diagnostics, troubleshooting and root-cause analysis; coordinate escalation with Engineering, Product teams, OEMs and suppliers.
• Perform or coordinate preventive and corrective maintenance, inspections, repairs, component replacement, upgrades and LTSA technical activities, directly with customers or through authorized service partners.
• Supervise technical activities performed by service partners and subcontractors, participate in project/commissioning/service meetings, provide technical status updates and manage assigned technical actions.
• Provide technical training, prepare relevant commissioning/service/maintenance documentation, and participate in the applicable on-call rotation for urgent remote or on-site support.
• Perform all activities in accordance with applicable HSE regulations, site rules and LONGi procedures. Ensure that activities under technical supervision are performed according to approved work instructions and safety procedures.Provide technical input to risk assessments, method statements and work instructions where required.Report unsafe conditions, technical risks or non-compliant activities through the applicable escalation process.

Skills

Troubleshooting

Customer-facing

Stakeholder coordination

Independence on site

Education

Electrical Engineering or related field

Tools

BMS

PCS

EMS

SCADA

PPC/PPM

LV/MV systems

Job description

LONGi Solar seeks an on-site BESS Site & Service Engineer to lead technical execution across installation, commissioning and handover for battery storage projects in Europe. You will coordinate with customers, EPCs, project teams and service partners, ensuring safety and quality on every phase.

The role requires frequent travel, strong troubleshooting, and hands-on interaction with BMS/EMS/SCADA systems, with responsibility for remote and field support and occasional on-call rotations.