The Riello Multi Sentry MST 20 kVA is a state-of-the-art transformer-free online double-conversion (VFI-SS-111) UPS designed to protect critical IT, medical, and industrial systems. Featuring a high-frequency IGBT rectifier, it delivers an input power factor of 0.99 with total harmonic current distortion (THDi) under 3%, eliminating disturbances to upstream networks and generators.
With an output power factor of 0.9 (delivering 18 kW active power) and advanced battery care management, the MST 20 ensures maximum uptime and flexible operation across On-Line, Eco, Smart Active, and Standby Off modes.