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Alternative Fueled Vehicles

Skip Navigation LinksPUC > Energy > Alternative Fueled Vehicles > Plug-In Electric Vehicle Submetering

Plug-In Electric Vehicle  (PEV) Submetering

Pilot Program Overview

In September, the California Public Utilities Commission will launch a pilot program to help electric vehicle owners optimize charging their electric vehicles at home and at work. Residential and commercial Plug-In Electric Vehicle (PEV) customers of Pacific Gas & Electric (PG&E), Southern California Edison (SCE), and San Diego Gas & Electric (SDG&E), including Net Energy Metering customers, are eligible. The pilot intends to improve customer choice and value by using energy meters specifically for PEV charging to help drivers save on fuel costs and avoid upgrading their electrical infrastructure.

What is the purpose of PEV Submetering?

Customers can access PEV Time-Of-Use (TOU) electric rates by either installing separate electrical service and meter dedicated to PEV charging or enrolling their house or facility with a TOU rate. According to a recent survey of participants in the Clean Vehicle Rebate Program, while a majority of drivers  (65-80%) know about special rates for PEV charging, only 62% use them. The State of California has set goals to ensure that customers charge their PEVs in a way that minimizes their impact on the grid and maximizes their fuel and cost savings. For the Submetering Pilot, separate PEV or "whole house" Time-Of-Use service is not required to access these rates. Instead, customers will use meters available from third-party electric vehicle service providers (known in the pilot as "Submeter Meter Data Management Agents") to measure their electricity use for utility billing purposes.

What are the benefits?

PG&E, SCE, and SDG&E offer Time-Of-Use (TOU) rates for customers to charge their PEVs that may reduce their monthly travel expenditures. Submetering may provide additional value by avoiding the costs of charging infrastructure and other barriers to the adoption of TOU rates. In addition, encouraging night-time charging helps ensure that there is sufficient electrical grid capacity to meet the needs of all customers while minimizing cost and environmental impact. 

The Time-Of-Use rates apply for the following utilities and types of customers:

  • PG&E Website & Rate v1 , Rate v2
    • Residential
      • EV-B
    • Commercial/Industrial
      • A-6
      • A-10
  • SCE Website & Rate v1 , Rate v2 
    • Residential
      • TOU-EV-1
    • Commercial/Industrial
      • <20 kW: TOU-EV-3
      • >20 kW and <500 kW: TOU-EV-4
  • SDG&E Website & Rate v1 , Rate v2 
    • Residential
      • EV-TOU
    • Commercial/Industrial
      • <20 kW: Schedule A
      • >20 kW: AL-TOU


Participate in the Pilot

Customers interested in participating in the PEV Submetering Pilot Program should contact a Submeter MDMA operating within their electric company's jurisdiction (your electric company provides and bills you for electricity). Up to 500 customers per utility territory (1,500 total) are eligible for this year-long program.

Submeter MDMAs enrolling PG&E, SCE, and SDG&E customers:

Regulatory History

  • April 20, 2015: Energy Division approves IOUs' second revision to Submetering Tarif and Agreemens (see Rate v2 links at left).
  • August 7, 2014: Energy Division approves IOUs' revised Submetering Tariff and Agreements (see Rate v1 links at left).
  • July 23, 2014: Energy Division holds meeting with IOUs and MDMAs to discuss the processes to be completed during pilot operations.
  • July 11, 2014: Submeter Meter Data Management Agents notice the CPUC of their participation in the pilot.
  • July 10, 2014: IOUs submit revised Submetering Tariff and Agreements in compliance with E-4651
  • June 26, 2014: CPUC Resolution E-4651 approves the utilities' request to implement a PEV Submetering Pilot.
  • November 13, 2013: CPUC Decision 13-11-002 modifies the utilities' requirements for the development of the Submetering Protocol.

Contact Information

For questions regarding this Pilot, contact the CPUC Energy Division: Adam Langton or Noel Crisostomo.


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