The test method is part of an ENERGY STAR program to improve the efficiency of uninterruptible power supplies (UPS) with potential energy savings of 710 million kWh per year in the USA alone.
The test method is based on IEC62040-3. The ENERGY STAR UPS program covers products including: single- and three-phase UPSs for home, small office, and data center use; static and rotary UPSs; AC- and DC-output UPSs; and modular UPSs. Efficiency measurements will be taken at 100%, 75%, 50%, 25%, and 0% load, with optional testing at 10%, 20%, 30%, and 40% load conditions. Power factor limits will also be included in the test procedure.
See the ENERGY STAR UPS web pages.
