The second-generation EA900 series 1kVA-10kVA UPS is a new-generation general-purpose power supply designed and manufactured by ESTlink, integrating the latest research and development achievements and application experience. Utilizing advanced DSP digital control technology, it effectively enhances product performance and system reliability, while achieving higher power density integration and miniaturization. Simultaneously, catering to the personalized needs of small and medium-sized enterprises and institutions at home and abroad, as well as the demand for small-scale power supply environments, this high-end, low-power online UPS product is designed to provide high-reliability power protection for departmental servers, small local area networks, workstations, industrial control computers, small equipment, and other small precision electronic instruments.