APS Energia. 

Founded in 1995 and headquartered in Warsaw, Poland, APS Energia S.A. is a global provider of uninterruptible power supply (UPS) systems. The company excels in the design, production, and worldwide sales of these critical power solutions, catering to a wide array of sectors including manufacturing, heating, industry, telecommunications, and medicine. Its comprehensive product line features emergency power systems, AC and DC receivers, rectifiers, inverters, frequency converters, active filters, fuel cells, and sophisticated power system surveillance technologies. Additionally, APS Energia offers specialized components such as DC/DC EPI converters, power systems for asynchronous motors, BRI discharging rheostats, and auxiliary and general-purpose power supply units. The firm also provides end-to-end services, encompassing design, assembly, installation, commissioning, along with full warranty and post-warranty support for its power equipment.