Hitachi Hi-Rel Power Electronics (formerly known as Hi-Rel Electronics) is a company that specializes in providing power electronics products and custom solutions. It manufactures uninterruptible power supply (UPS) products, medium and low voltage variable frequency drives, grid-tied solar inverters, air compressors, railway inverters, and battery chargers. The company serves refineries, petrochemicals, power generation, steel and metals, and process industries.