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On Vehicle Sub Metering CPUC Sub Meter Protocol Workshop Cost Effective – least cost impact to consumer, utility, and providers The Utility receives the sub meter electricity useage data with the association information - bills the customer account associated to the Vehicle ID at the appropriate EV rate and subtracts the kWh useage from the associated Primary Meter owner’s account.Īttributes CPUC Sub Meter Protocol Workshop Communications – standards based ability to collect energy consumption data and convey data to Utility accounting back office – Association – ability to connect sub meter to primary meter for subtractive billing Certification – ability to verify accuracy of sub meter measurements Standardization – prescribed national standards specifying requirements, technology implementation, and certification process Accountability – ownership and responsibility for certification, accounting, billing, data processing, aggregation services, etc. The PEV electricity consumption is separately measured using a sub meter which provides a recording of the total kWh usage measurement with time stamps (TOU). The Utility is able to identify the PEV load associated to the Vehicle ID which is associated to a Utility customer account which is associated to the location’s Primary Meter. Optimal Use Case Scenario Other loads Smart Charging Sub Meter CPUC Sub Meter Protocol Workshop The Customer plugs in anywhere to charge (120V Outlet/240V EVSE/DCFC) – at home, friends home, public, workplace, commercial, etc. California Public Utilities Commission Sub Meter Protocol Workshop George Bellino Project Engineer Infrastructure Commercialization