The Digital EnergyTM SG Series UPS includes the outstanding performance characteristics found in the original very successful and reliable SitePro ® with many important enhancements. Improvements such as front access, internal 5th & 11th harmonic filter, and fused surge protection are just a few of the design features that make the SG Series UPS best in class for output performance, footprint, efficiency and functionality. The SG Series UPS is one of the best performing and most reliable three-phase UPS systems, providing critical power protection for a wide range of mission critical applications. Every UPS system operates in double conversion mode with true continuous on-line VFI (voltage and frequency independent) operation, yielding the maximum levels of power reliability for all mission-critical applications. The SG Series UPS was developed using GE's Design for Six Sigma methodology to ensure that the product fully meets customer requirements and expectations.