Welcome to TSI Power Corporation Manufacturer of world-class electric power quality solutions · Raptor technology platform family · VRP series precision automatic voltage regulators · VRX series outdoor precision automatic voltage regulators · ATS series automatic transfer switches · Outdoor XUPS line-interactive AC outdoor uninterruptible power supplies · Outdoor DC-UPS ac-to-dc outdoor uninterruptible power supplies · ILC-MED hospital-grade isolation line conditioners TSI Power also makes custom solutions for all applications derived from our extensive technology portfolio. Learn More Automatic Voltage Regulators TSI Power’s indoor and outdoor automatic voltage regulators are available for a variety of applications, including industrial, telecom and medical. See Indoor Options See Outdoor Options Outdoor Uninterruptible Power Supplies TSI Power's outdoor uninterruptible power supplies are the industry standard for backup power in remote, extreme environments See AC Options See DC Options Previous Next Automatic Voltage Regulators Indoor Outdoor Automatic Transfer Switches Indoor Outdoor Isolation Line Conditioners Indoor Outdoor Outdoor UPS AC Power DC Power