UPS Battery Commissioning & After-Sales Engineer

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.

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.