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PAP22 EV Refueling Submetering Use Cases

PAP22 EV Refueling Submetering Use Cases. 5 November 2013 SGIP Inaugural Conference Palm Beach, Florida V2G DEWG F2F Session George Bellino. EV Submetering Use Cases. Four Use Cases Identified Utility Owned Revenue Submeter 3 rd Party/Customer Owned Revenue Submeter

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PAP22 EV Refueling Submetering Use Cases

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  1. PAP22 EV Refueling Submetering Use Cases 5 November 2013 SGIP Inaugural Conference Palm Beach, Florida V2G DEWG F2F Session George Bellino

  2. EV Submetering Use Cases Four Use Cases Identified • Utility Owned Revenue Submeter • 3rd Party/Customer Owned Revenue Submeter • Non-Utility Revenue Submeter • Real Time Dispatchable Load Submeter

  3. Use Case 1: Utility Owned Revenue Submeter Electric Panel Electric Panel Utility EVSE Electric Submeter Primary Electric Meter PEV Power Communications • Purpose: separate measurement of PEV refueling kWh consumption for utility billing based on specific EV rate tariff • Requirements: Utility Jurisdiction - Accuracy, Access, Certification, Test , etc. specifications per utility regulations • Applied Standards: ANSI C12.1, C12.20, etc.

  4. Use Case 2: 3rd Party/Customer Owned Revenue Submeter Electric Panel Electric Panel External Submeter EVSE Utility Primary Electric Meter Embedded SoC PEV Internal Submeter Power Daughter Card or Module Data Management Agent Communications • Purpose: separate measurement of PEV refueling kWh consumption for utility billing based on specific EV rate tariff • Requirements: Jurisdiction is State Weights & Measures agencies • External Submeter can be same as Utility Owned Revenue Submeter • Other configuration as determined by ANSI C12 Sub Committee • NEMA determining EVSE Embedded Submeter requirements • Apply to Internal Submeter and Daughter Card/Module options

  5. Use Case 3: Non-Utility Revenue Submeter Electric Panel Electric Panel Primary Account Owner or EMS External Submeter EVSE Primary Electric Meter Embedded SoC PEV Internal Submeter Power Daughter Card or Module Data Management Agent • Purpose: separate measurement of PEV refueling kWh consumption for allocated billing by landlord to tenants or information for facility energy management – not for utility billing • Requirements: Jurisdiction is State Weights & Measures agencies • External Submeter same as Utility Owned Submeter; • Other configuration as determined by ANSI C12 Sub Committee • NEMA determining EVSE Embedded and Internal/Module Submeter requirements Communications

  6. Use Case 4: Real-time Telemetry for Dispatchable Loads Electric Panel Electric Panel External Submeter EVSE Utility/ISO Primary Electric Meter Embedded SoC PEV Internal Submeter Power Daughter Card or Module Aggregator/EVSP • Purpose: provide the operational state - i.e. amount of power consumed or produced by the PEV in real-time for bi-directional power flow • Requirements: • Measure instantaneous power - both real and apparent • Measure charge/discharge energy capacity • Frequency data measured – 2 seconds to 5 minutes • Frequency data reported – 2 seconds to 15 minutes • Power measurement accuracy: 2% - 5% Communications

  7. Use Case Requirements Structure and Dependencies PEV Refueling Submeter Requirements NIST NCWM PUC NEMA ANSI

  8. Assumptions/Questions • Use Case 1: Utility Owned Revenue Submeter • Assumes existing Utility meter regulations apply • Will Utilities own EVSE as a submeter device and affect EVSE embedded/internal submeter requirements? • Per HB 33 all EVSEs shall have submeter function – conflict with Utility fixed submeter? • Use Case 2: 3rd Party/Customer Owned Revenue Submeter • EVSE to be tested as a submeter device - Requirements apply to all embedded and internal daughter board/module configurations • External submeter – comply with NEMA requirements or same Utility owned Submeter? • Assume not addressing Level 1 submetering nor portable submetering? • Communication protocols to be specified by utility industry? • Harmonization with NCWM HB44 requirements? • Use Case 3: Non-Utility Revenue Submeter • Assumes requirements same as Use Case 2 • Is there differentiation in Accuracy, Calibration, Access, etc. requirements between Utility Revenue Submeter and Non-Utility Revenue Submeter? • Use Case 4: Real Time Telemetry for Dispatchable Loads • Will requirements for Use Case 2 and 3 support this Use Case? • Is there variability in functional requirements that need be addressed? .

  9. Questions • Do all state PUCs maintain jurisdiction over utility revenue meters? • How do municipal utilities (not under CPUC jurisdiction such as SMUD and LADWP) regulate their revenue meters? • Do other states allow use of submeters for utility billing? • Will other state PUCs adopt 3rd Party revenue submeter ownership? • Is it assumed there will be variability in performance and functionality requirements between embedded, portable, and fixed submeters? • Is there intent to submeter 120V/1.5kW charging? Portable EVSE cords, plug outlet adapters, etc.? • Is there differentiation in performance and functionality between submeters for C&I environment versus Residential environment?

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