UPS Battery Commissioning & After-Sales Engineer
Key Responsibilities
1. On-Site Installation & Commissioning
Supervise on-site installation of UPS main units and supporting lithium battery packs, including wiring inspection, polarity verification, torque tightening, and insulation testing.
Perform system power-on, parameter configuration, float / boost voltage setting, battery balancing commissioning, and discharge testing.
Verify DC bus voltage, charging current, and cell voltage to ensure compliance with design and manufacturer specifications.
Prepare commissioning reports and acceptance reports, and support customers in project acceptance.
2. After-Sales Troubleshooting & Technical Support
Respond promptly to customer service requests, and conduct on-site troubleshooting for UPS and battery system faults (abnormal voltage, charging issues, overheating, alarms, failure to switch to battery mode, etc.).
Independently locate faults, including issues with rectifiers, inverters, battery cells, connecting cables, sensors, control boards, etc., and implement solutions.
Guide high-voltage engineers in replacing faulty batteries, repairing / replacing modules, and addressing safety hazards such as terminal overheating, loose connections, electrolyte leakage, and swelling.
Provide remote technical support and guide customers in basic operations and simple fault handling.
3. Inspection & Preventive Maintenance
Conduct regular inspections in accordance with standards: measure cell voltage, internal resistance, temperature, connection tightness, and ambient temperature / humidity.
Generate inspection reports and provide maintenance recommendations: battery balancing, replacement of underperforming cells, cleaning and dust removal, cable rectification.
Perform preventive maintenance: battery calibration, charge-discharge testing, insulation testing, and LOTO safe operations.
Establish equipment accounts and maintenance records, and track battery health status and lifecycle.
4. Safety & Compliance Operations
Strictly implement electrical safety standards: LOTO (Lockout/Tagout), high-voltage operation specifications, PPE wearing, and arc flash protection.
Comply with on-site safety management regulations, identify risks such as DC short circuit, thermal runaway, electric shock, and fire, and implement protective measures.
Adhere to local electrical safety standards (e.g., NFPA 70E, OSHA).
5. Customer Communication & Training
Clearly explain fault causes, solutions, maintenance points, and precautions to customers.
Provide basic operation training for customer O&M personnel: power on/off, mode switching, alarm viewing, routine inspection, and emergency handling.
Maintain good customer relationships, provide timely feedback on on-site issues, and improve customer satisfaction.
6. Documentation & Spare Parts Management
Complete and accurately fill in commissioning records, repair work orders, inspection reports, and fault analysis reports.
Report defective products and spare parts requirements, and assist in managing on-site commonly used spare parts including batteries, cables, terminals, fuses, etc.
Requirements
1. Education & Major
Bachelor's degree or above in Electrical Engineering, Mechatronics, Automation, Electronic Engineering, or related fields.
2. Professional Knowledge
Master basic AC/DC circuits, Ohm's Law, series/parallel connections, and power calculations.
Familiar with UPS working principles, double-conversion architecture, and rectifier / inverter / bypass logic.
Proficient in battery system knowledge: float/boost charging, internal resistance, capacity, balancing, thermal runaway, etc.
Ability to read electrical schematics, wiring diagrams, and system single-line diagrams.
Skilled in using multimeters, clamp meters, internal resistance testers, megohmmeters, and other testing instruments.
3. Work Experience
Experience in UPS installation and commissioning, battery maintenance, or data center / computer room operation and maintenance.
4. Skills
Ability to independently perform power-on, commissioning, troubleshooting, and repair of UPS battery systems.
Strong hands-on skills and on-site problem-solving capabilities.
Able to travel frequently for on-site work, and accept overtime and emergency repairs.
5. Safety Awareness
Basic high-voltage electrical safety awareness, familiar with LOTO and live working specifications.
Strict operational discipline with no record of major safety incidents.
6. Soft Skills
Clear communication skills, strong service awareness, and high sense of responsibility.
Hardworking, adaptable to on-site environments, and strong execution ability.
