The new tescom ds power sh and shp series ups appears as a cost effective and smaller footprint ups. Using the 3 level inverter topology and control system, this series ups have the latest dsp technology to be programmed to suit a wide variety of electrical environments without impending its performance. Efficiency, reliability and functionality are enhanced to levels unattainable with the old analogue technology. This technology does not only create significant increase in mtbf, but the capability of dsp to accurately manipulate signals at very high speed permits all the ups subsystems to be controlled with greatly increased precision.