True Voltage and Frequency Independent (VFI) technology makes the GE SitePro UPS one of the most reliable systems available for data security and other demanding critical applications.SitePro UPS is a three-phase, on-line, double conversion mode (providing true on-line operation) and is fully compliant with international standards regarding VFI operation. This continuous on-line UPS is available in models from 10kVA up to 500kVA. For high-power redundant applications, the SitePro UPS can be installed with up to eight units in parallel, achieving power protection up to 4MVA. Redundant Parallel Architecture (RPA) is a feature whereby SitePro UPS systems are controlled in a true peer-to-peer configuration with redundancy in all critical elements and functions. This advanced technology provides the greater system reliability for mission critical applications.