Ex Ante Review
The Ex Ante process estimates the potential
energy savings for an energy efficient measure before it is installed based on
predictions of typical operating conditions and baseline usage. The process is
the basis for utilities to claim savings for their energy efficiency portfolios.
The Ex Ante process covers deemed measures (DEER and non-DEER), measures that
have well-known and consistent performance characteristics, and custom measures.
The Database of Energy Efficient Resources and Ex
Ante Regulatory Support RFP
No. 12 PS 5125 contains details on the scope of work for the four work areas
of Ex Ante Review.
R.13-11-005 - Establishes a proceeding in which to fund the current energy
efficiency portfolios through 2015, implement energy efficiency "rolling
portfolios", and address various related policy; Phase
I Decision - October 27, 2014; Compliance
Filing Corrections from Decision - November 11, 2014
Ex Ante Review Fact Sheets
The set of fact sheets provide high level
information and policy background to the Ex Ante review process. The purpose is
to provide the public and stakeholders a better understanding of how the PUC
conducts its review process.
Ante Review Fact Sheet #1 provides information on how cost effectiveness is
Ante Review Fact Sheet #2 provides information on different components of
the review process and how each of them works.
Ante Review Fact Sheet #3 provides information on high-level assumption for
HVAC savings estimates currently used for the review process.
Energy Modeling Tools Workshop Materials
On September 18, 2015, from 9:30am to 4:30pm,
Commission staff is holding a workshop to exchange information on the
predominant whole building energy modeling simulation tools in the market to
understand what’s out there, how it’s used, and how we understand the
strengths and weaknesses of each tool.
DEER (Database for Energy Efficient Resources)
DEER, the Database for Energy Efficient
Resources, provides energy savings estimates for typical energy efficient
technologies and measures. The database contains information and data, such as
unit energy savings, effective useful life values, and net to gross ratios for
measures that are commonly installed in the marketplace. DEER is currently
managed by the Energy Division, with funding provided by California ratepayers.
The DEER website, www.deeresources.com,
contains the database and all supporting documentation. Data can be accessed and
downloaded through the database interface Remote Ex Ante Database Interface (READI)
on the DEER website.
Instructions for analyzing measure savings
impacts and parameters can be found in
Master Documentation compiles DEER2008, DEER2011, and DEER2014 update
documents and data into one directory. The Excel spreadsheet contains
information and links to the individual documents. Please follow these steps to
ensure the links work: (1) Extract the main folder onto your desktop and (2)
Enable editing and macros in the excel file.
Update Plan outlines the process for updates for the 2014 and
directed the Energy Division to provide oversight of research and analysis of
the energy efficiency values. The Commission placed the updates to DEER under
the management of regulatory staff.
the Commission determined that DEER shall be the source of assumptions used to
estimate load impacts to the extent possible.
adopted the DEER2011 release for use in planning the 2013-14 energy efficiency
program cycle. In R.09-11-014,
the Commission also determined that the codes and standards that will become
effective in 2014 should be used to update the baseline values during the
2013-14 energy efficiency program cycle.
UPCOMING AND CURRENT EVENTS
on DEER updates.
For more information, contact Aaron Lu at email@example.com.
Non-DEER Workpaper Values for Energy Efficiency Measures
Program administrators and implementers develop
non-DEER workpapers for measures that are not captured in DEER. Potential energy
savings estimates are calculated based on best available information and
extrapolation from DEER values or methods, as appropriate. Program
administrators submit workpapers to the Energy Division for review on specific
non-DEER measures. The Energy Division reviews a sub-selection of the
submissions and releases dispositions with adjusted values, if needed.
Development, review and approval of non-DEER
workpapers has evolved through several decisions. D.09-09-047
gave Energy Division authority to review and approve non-DEER workpapers and
required Energy Division to develop a process for submittal, review and freezing
of non-DEER measures. During the 2010-2012 program cycle, an
administrative law judge ruling dated 11/18/2009 in A.08-07-021
provided a standardized review and approval process for Phase 2 non-DEER
- Requirements for utilizing DEER
values and methods in the development of non-DEER measures.
- A timeline for workpaper review
that required Commission staff to perform a preliminary review for
additional information within 15 days and the final review within 25 days of
receiving the additional review.
- A requirement for consideration
of the latest evaluation, measurement and verification published studies in
the development of ex ante values including energy impacts, cost data,
effective useful life, remaining useful life, and net-to-gross ratios.
- Provision for retrospective
staff reviews of frozen and workpapers not reviewed if the measures covered
by a workpaper eventually become high-impact measures, measures with the
largest amount of energy savings claimed by investor-owned utilities.
08-07-021 and required investor-owned utilities to cooperate with energy
division to allow upfront consultation regarding workpapers. D.11-07-030
approved all of Application
08-07-021 in regards to Phase 2 review, except the provision for
retrospective staff review, which was then removed.
is the guidance decision covering 2013-2014 energy efficiency applications and
includes a process for workpaper review that builds upon the process established
in the previous decisions. D.12-05-015
included the following requirements:
- Ex ante values shall be
updated in consideration of 2006-2008 evaluation results.
- Utilities shall include
workpapers in their initial 2013-2014 applications for all measures that are
not specifically included in the DEER database. (NOTE: Staff and
utilities refer to workpapers submitted with the initial 2013-2014
applications as “Phase 1” workpapers.)
- Update and review of workpapers
shall be given to High Impact Measures.
- If Staff is unable to review
all workpapers submitted with the initial 2013-2014 workpapers, the
un-reviewed workpapers shall receive “interim approval,” and Staff may
review any of these in the future, with revisions applied prospectively.
- A mid-cycle review is included
that prescribes a process for reviewing any workpapers that have interim
approval as well as any Phase 2 workpapers that are submitted during the
- New non-DEER measures may be
added during the program cycle. Staff may assign new non-DEER measures
“interim approval” prior to the completion of any necessary research.
- A Phase 2 submission and review
process is included that limits the time for staff review of workpapers and
does not allow the use of the disposition of “conditional approval” that
was previously allowed under D.11-07-030.
- Every six months Commission
Staff will develop a draft resolution covering any disputed workpapers that
will be subject to a Commission vote.
Custom Measures and Projects
Custom measures and projects are site-specific
energy efficiency projects. Custom projects require unique calculations for each
project, as they do not rely on fixed DEER or workpaper values. For custom
measures and projects the ex ante values cannot be forecasted in advance since
the preliminary ex ante values are not known until the project is identified.
Final ex ante values are not developed until the project is completed.
Commission Decision 11-07-030
establishes a clear process by which ex ante energy savings estimates from
custom measures and projects are reviewed.
approves that the Energy Division custom project ex ante review process is
reasonable and should be adopted. Attachment
B of the filing details how the investor-owned utilities’ energy savings
claims will be reviewed:
- Under the General Review
process, the Energy Division will review tools, measures, and projects, as
well as inputs to the tools for selected projects. The tool reviews will be
done on a prospective basis.
- The Pre-Installation Review process
allows the Energy Division to perform a parallel review process with the
investor-owned utilities, and then allows for the Energy Division to provide
inputs and recommendations.
- The Post-Installation Review
process is used to provide the Energy Division with opportunity to review
the accuracy of energy savings claims assumed by the investor-owned utility
prior to the utility making its final incentive payment to its customer.
- Under the Investor-Owned
Utility Claim Review process, the Energy Division conducts a review of
energy savings for custom projects to ensure that recommendations made by
Energy Division were accurately reflected in the claim.
Customer process guidance documents can
be found on this page.