Single phase UPS
Powervar’s unique technology comines a UPS system with Power conditioning elements. This combination call Uninterruptable Power Management (UPM) combines vlotgae filtering, frquency stabilizer, surge deflection, low impedance transformator and a UPS. Powervar’s UPM systems for single phase have a power range of 420VA to 10,000VA, long backup times that can be extended with an external batteries. Powervar also have medical certifications for some models, and standard rackmount option.
 https://www.powervar.com/products/single-phase-ups