On-line Double Conversion, Intelligent and Heavy-duty, 3-Phase, 10-20kVA UPS The Digital Energy LP33 Series of UPS products is a robust, high performance UPS system that provides power protection for a wide range of mission critical applications. Every LP33 Series unit operates in double conversion mode with true continuous on-line VFI (voltage and frequency independent) operation. To achieve redundancy or to increase power capacity, GE's unique Redundant Parallel ArchitectureTM (RPA ) technology enables the LP33 Series to parallel up to four units. RPA allows customer the flexibility to expand power by paralleling units, or the system's reliability can be increased by adding redundant units to create a totally redundant system with no single point of failure. When sourcing a UPS from GE, you also get access to valuable services, such as solution design, integration within networking environments, customization, 24x7 preventive and corrective services, and training.