Uninterruptible Power Supplies

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Uninterruptible power supplies or UPSs are battery chargers consisting of a combination of convertors, switches and energy storage devices (such as batteries), constituting a power system for maintaining continuity of load power in case of input power failure.  10 CFR 430 Appendix Y 2.27.  This webpage only includes information and rulemaking activity about the subset of battery chargers which are UPSs.  Please see the battery charger website for information regarding other battery chargers.

Current Standard | Current Test Procedure | Ongoing Rulemaking for Standards | Ongoing Rulemaking for Test Procedure | Helpful Links

Recent and Ongoing Activities

DOE has published a Federal Register notice proposing to amend its test procedure for uninterruptible power supplies (UPSs) to consider the latest revision of the industry standard that is incorporated by reference and to provide an optional test method for measuring power consumption of a UPS at no-load conditions. DOE is seeking comment from interested parties on the proposal.

  • DOE will accept comments, data, and information regarding this NOPR until March 6, 2023.
  • Interested persons may submit comments identified by docket number EERE–2022–BT–TP–0005, by email (UPS2022TP0005@ee.doe.gov), Federal eRulemaking portal (http://www.regulations.gov).
  • DOE will hold a webinar on Thursday, February 2, 2023, from 1:00p.m. to 4:00 p.m.
  • Click here to register for the webinar.
  • Foreign Nationals interested in participating in this webinar, must be screened by DOE Headquarters Security prior to being granted access. Please email Regina.Washington@ee.doe.gov to complete the necessary documentation at least two weeks prior to scheduled meeting date.
  • Additional webinar registration information, participant instructions, and information about the capabilities available to webinar participants will be published on DOE’s website: https://energy.gov/eere/buildings/public-meetings-and-comment-deadlines

DOE has published a Federal Register correction notice pertaining to test procedures for uninterruptible power supplies (UPS). On December 12, 2016, DOE published a final rule that added a test procedure for UPSs to the existing DOE test procedure for battery chargers. This document corrects an error in the amended regulatory text as it appeared in the December 2016 final rule. Neither the error nor the correction in this document affect the substance of the rulemaking or any conclusions reached in support of the final rule.

  • This correction will be effective May 11, 2022.

For the latest information on the planned timing of future DOE regulatory milestones, see the current Office of Management and Budget Unified Agenda of Regulatory and Deregulatory Actions. All planned dates are preliminary and subject to change.


Final Rule
  • Federal Register, 85FR1447 (January 10, 2020)

Notice of Proposed Rulemaking 

The uninterruptible power supply conservation standard rulemaking docket EERE-2016-BT-STD-0022 contains all notices, public comments, public meeting transcripts, and supporting documents pertaining to this rulemaking.

Public Meeting Information:

There is no public meeting scheduled at this time.

Submitting Public Comments

The comment period is closed.

Test Procedure

Notice of Proposed Rulemaking
  • Federal Register, 88FR790 (January 5, 2023) 
Final Rule; Amendment Correction 
  • Federal Register, 87FR28755 (May 11, 2022)

Request for Information

  • Federal Register, 87FR5742 (February 2, 2022)
Final Rule

The rulemaking docket EERE-2016-BT-TP-0018 contains all notices, public comments, public meeting transcripts, and supporting documents pertaining to this rulemaking.

Public Meeting Information

There is no public meeting scheduled at this time.

Submitting Public Comments

Current Standard

UPSs manufactured and distributed in commerce, as defined by 10 CFR 430 Appendix Y Section 2.27, must meet the energy conservation standards specified in the Code of Federal Regulations at 10 CFR 430.32(z)(3).

Current Test Procedure

Any representation regarding the energy consumption of UPSs must be based on the test procedure methods specified at 10 CFR 430, Subpart B, Appendix Y.

Helpful Links


For information on current test procedure waivers, see DOE’s Waivers webpage
For information about obtaining test procedure waivers, see 10 CFR 431.401.

Guidance and Frequently Asked Questions

For information on further guidance and answers to Frequently Asked Questions on all covered products, see DOE’s Further Guidance database.

Contact information

For more information related to this product, please email: