A. Decisions directing rates for EV drivers

CPUC has approved time-of-use (TOU) energy rates for residential customers that drive EVs and charge at home in the service territories for PG&E, SCE, SDG&E, Bear Valley, and Liberty Utilities. TOU rates are designed to provide price signals to customers about when it is better to use electricity to optimize the use of grid resources and maintain reasonable rates and reliability. The rates and TOU periods vary by utility, but generally, the rates are lowest overnight, allowing drivers enough time to charge their EVs while they are at home. These “off-peak” rates allow EV drivers to fuel their vehicle for less than the equivalent cost of gasoline. A summary of decisions authorizing rates is given below, and for further details on all EV rates offered by the IOUs please see the IOU Rates page

Decision D.20-04-009 authorized SDG&E to implement an interim rate waiver for its TOU-M rate. This decision allows SDG&E to offer its TOU-M rate to those that are adopting EVs or installing public EV charging stations without limiting it to customers under 40kW only. The CPUC issued this decision as an interim solution while it reviews SDG&E’s application for an EV-specific commercial rate. However, the CPUC has since issued a decision D.20-12-023 that established SDG&E’s Electric Vehicle High Power Rate (EV-HP) for commercial and industrial customers.

Decision D.19-10-055 authorized PG&E to establish a new commercial EV rate. This rate is designed to offer PG&E’s commercial and industrial customers – a group that includes transit fleet operators, owners of electric delivery trucks, and providers of public charging stations—the option to enroll in a subscription-based rate. This new rate eliminates demand charges and instead implements a subscription model like a cell phone bill, with TOU volumetric energy charges that encourage customers to charge off-peak.

Decision D.18-09-034 approved Bear Valley’s EV TOU Pilot Rate that is designed for participants of its make-ready rebate program for destination centers as well as residential customers.

Decision D.18-05-040 approved three new EV-specific rates for SCE customers and offered a five year holiday from demand charges for customers that have adopted EVs. The five-year holiday period would provide customers time to develop load management strategies and mitigate demand charges.

Decision D.18-01-024 authorized SDG&E to develop a ‘public grid integration rate’ for limited use as part of its Green Shuttle Pilot and provided SDG&E territory car dealerships training and incentives if customers purchased an EV and signed up for SDG&E EV rate.

  1. For details on all EV rates offered by the IOUs please see https://www.sdge.com/rates-and-regulations/current-and-effective-tariffs
  2. https://www.sce.com/regulatory/tariff-books/rates-pricing-choices
  3. https://www.pge.com/tariffs/index.page

For EV specific rates as of October 2021 please see here:

B. Submetering

The large IOUs implemented the Plug-In Electric Vehicle Submetering Pilot from 2014 through 2018, with two phases of the pilot. The pilot tested using energy meters, embedded in an EV charging station, to separately meter EV charge load from the house’s meter. This helps EV drivers save on fuel costs, allows them to enroll on EV TOU rates for EV charging purposes while keeping their homes on standard TOU plan, and allows drivers to avoid paying to install a new utility meter just to measure EV charging load. In 2019, Energy Division staff hosted a public workshop to discuss the results of the Plug-In Electric Vehicle Submetering Pilot.  In 2020, the CPUC directed the IOUs to commence work on drafting a Plug-In Electric Vehicle Submetering Protocol that was submitted in December 2020. A decision on submetering is expected in early 2022.

C. Resale of Electricity

Providers of both light-duty and medium- and heavy-duty charging services are not regulated as public utilities. The CPUC issued a decision in 2020 (D.20-09-025) that extended a previous CPUC determination that providers of light-duty charging services are not public utilities to providers of medium- and heavy-duty EV charging services, and off-road EV or off-road electric equipment charging services.

D. IOU cost and load research reports

The CPUC decided (D.13-06-014) that the utilities should continue conducting research about the grid impacts of the load associated with electric vehicle charging and costs associated with any new transmission infrastructure needed to service the increased electric vehicle load. The CPUC required the IOUs to report their TE program costs starting from program year 2019. These are to be included in the load research report that the three large IOUs (PG&E, SCE, and SDG&E) must jointly submit by March 31. Previous reports can be found here:

  • Joint IOU Electric Vehicle Load Research and Charging Infrastructure Cost Report (9th Report) Apr 1, 2021)
  • Joint IOU Electric Vehicle Charing Infrastructure Cost Report (8th Report), Mar 31, 2020
  • Joint IOU Electric Vehicle Load Research Report (7th Report), Apr 2, 2019
  • Joint IOU Electric Vehicle Load Research Report (6th Report) Dec 29, 2017
  • Joint IOU Electric Vehicle Load Research Report (5th Report) Dec 30, 2016
  • Joint IOU Electric Vehicle Load Research Report (4th Report) Dec 24, 2015
  • Joint IOU Electric Vehicle Load Research Report (3rd Report) Dec 23, 2014
  • Joint IOU Electric Vehicle Load Research Report (2nd Report) Jan 31, 2013