The second-generation EA900 series 1kVA-20kVA UPS is a new-generation general-purpose power supply designed and manufactured by ESTAR with the latest research and development achievements and application experience. It employs advanced DSP digital control technology, effectively enhancing product performance and system reliability, while achieving higher power density integration and miniaturization. To fully meet users' personalized needs, this high-end low-power online UPS power supply product is specifically designed for the power supply requirements of small and medium-sized enterprises and institutions at home and abroad, as well as small-scale power supply environments. It provides high-reliability power protection for users' departmental servers, small local area networks, workstations, industrial control computers, small equipment, and other small precision electronic instruments.