Energy Efficiency Resources

The Database for Energy Efficient Resources (DEER) contains information on selected energy-efficient technologies and measures. The DEER provides estimates of the energy-savings potential for these technologies in residential and nonresidential applications. The database contains information on typical measures -- those commonly installed in the marketplace -- and data on the costs and benefits of more energy-efficient measures. Energy-efficient measures provide the same energy services using less energy, but they usually cost slightly more.

Updates to the Database for Energy Efficiency Resources (DEER) have been developed by the California Public Utilities Commission (CPUC) with funding provided by California ratepayers.

What's Happening

For DEER2021, a revised water heater calculator package was made available on 2020-06-01. See DEER2021.

The DEER2022 Scoping Memo is available for review at!/documents/2372/view as of 2020-04-21. Comments were due by 2020-05-04.

The 2019 year-end ESPI reports are available. More information is available here:

DEER2021 has been published per Resolution E-5009, adopted on September 12, 2019.

DEER2020 has been published. See the update descriptions under the DEER Versions menu for more information. The planned DEER update to the Ex Ante database was completed on 07-Dec-2018.

READI version 2.5.1 released; this version supports the Official Ex Ante database as well as viewing the proposed DEER2020 Update in the Preliminary Ex Ante Review database." See About READI for more information.

DEER2019 and June 2017 updates have been added to the PEAR database and are described on a new DEER Versions page.

2017 Phase 1 dispositions are added to the Non-DEER Workpapers page.

The 2017 Workpaper Guidance Document is added to the Non-DEER Workpapers page.

DEER2017 and DEER2018 values have been added to the ex ante database. See the update descriptions under the DEER Versions menu for more information.

Dispositions from the second half of 2016 are added to the Non-DEER Workpapers page.

Pursuant to Decision (D.) 13-09-023, Commission staff scored the utilities on their annual ex ante review performance as part of the Efficiency Savings and Performance Incentive. The final 2015 ESPI memos are published under the Energy Savings and Performance Incentive section under the main menu. Commission staff will be holding meetings with each utility to discuss the final scores.



Questions about DEER database and READI: This email address is being protected from spambots. You need JavaScript enabled to view it.