APS Energia. 

APS Energia SA designs, produces, and sells uninterruptible power supply systems for the production, heating, industry, telecommunications, medicine, and other sectors worldwide. The company offers emergency power systems, AC and DC receivers, rectifiers, uninterruptible power sources, inverters, frequency converters, active filters, power system surveillance systems, and fuel cells. It also provides DC/DC EPI converters; power systems for asynchronous motors; BRI discharging rheostats; auxiliary and general-purpose power systems; power supply systems with fuel cells; and surveillance systems. In addition, the company offers design, assembly, installation, commissioning, warranty, and post-warranty service of the power supply equipment. It operates in oil and gas, power, nuclear and renewable energy, traction and transport, and industrial markets. APS Energia SA was founded in 1995 and is based in Warsaw, Poland.