Active Power

This paper from Active Power discusses the  differences in efficiencies of various three-phase uninterruptiblepower supply (UPS) systems available in the marketplace and demonstrate, through laboratorystudies and actual field measurements, that flywheel based UPS systems, such as thosemanufactured by Active Power, Inc., provide dramatically better efficiency across the boardthan conventional double-conversion UPS with batteries. This higher efficiency can result intens to hundreds of thousands of dollars in annual cost savings for typical data centers.

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