Uninterruptible Power Supplies


Uninterruptible power supplies (UPS) provide backup power and typically are used to ensure the continued operation of computers, data center equipment, telecommunications equipment, and other devices in the event of a power failure.


There are no national standards for UPS. In December 2016 DOE issued a final rule for UPS, which should have established the first national efficiency standards for these products. However, DOE has yet to publish the UPS final rule in the Federal Register. California’s battery charger standards covered UPS starting in 2014, and in May 2018 Vermont adopted state standards for UPS equivalent to the standards in the DOE final rule. The Vermont standards will reduce energy consumption for the most common types of UPS by 40–50%.


DOE estimates that 51% of shipments of uninterruptible power supplies meet the standards in the DOE final rule.


Federal Date States
2021 WA Standard Effective
2021 CO Standard Effective
2020 VT Standard Effective
2019 WA Standard Adopted
2019 CO Standard Adopted
2018 VT Standard Adopted

Timeline reflects state standards from 2001 to present; federal standards from inception to present.