DC Fast Charging Best Practices

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Amie Wilkins
10 years ago
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1 DC Fast Charging Best Practices

2 Greenlots. Intelligent Charging Networks Accelerate EV Adoption. Open Standards Communication Network Management Easy Driver Access OCPP communication between charger and network OpenADR between utility and vehicles Guards against stranded assets by allowing owners to swap networks without replacing hardware View your network in real-time Pull usage reports Set charging fees with utmost flexibility (/kwh, /hr, /session) Get alerted of any faults and steps taken to rectify support number 24/7 Smart charging & DRLC Easy driver roaming Single access card Mobile app for search and access Pay for charging with credit cards RFID cards also supported support number 24/7 HARDWARE AGNOSTIC We work with leading charging hardware manufacturers. Our solution has been tested extensively with hundreds of units already deployed. TURNKEY SOLUTIONS We help from start to finish (choosing a site > charger selection > commissioning > driver engagement > ongoing support) to ensure a seamless setup.

owners to swap networks without replacing hardware View your network in real-time Pull usage reports Set charging fees with utmost flexibility (/kwh, /hr, /session) Get alerted of any faults and

3 Open Standards Enables More Equipment Choice Lite-On Level 2 CMI Level 2 Efacec DCFC ABB DCFC Eaton Level 2 Signet DCFC 20kW / 50kW / 100kW 208V or 480V

4 Fast Charging Takes Off In Canada B.C. is expected to have one of the highest EV adoption rates in North America Highest differential between electricity and gasoline prices in N.A. Environmentally conscious customers: 2x higher adoption rates of hybrids than rest of Canada 73% of population concentrated in urban areas with 95% of trips less than 30 km BC Hydro has deployed 13 of 31 DC Fast Chargers (50kW) 7 ABB Terra chargers, 6 Eaton DC fast chargers Seamless user experience thru mobile app and RFID Multiple hardware providers connected to one network management solution using OCPP No monthly subscription for customers Supports multiple payment options: Credit cards via mobile app Optional RFID cards Phone payments

Environmentally conscious customers: 2x higher adoption rates of hybrids than rest of Canada 73% of population concentrated in urban areas with 95% of trips less than 30 km BC Hydro

5 DCFC Usage Profile: Close to Major Highway Peak usage occurs in the mid-afternoon hours Sessions are around 18 minutes long and use about 8.5 kwh of energy Usage has increased in the last 11 months, corresponding with steady EV sales in the region 3 months 6 months 11 months Peak Time of Use 2-3 pm 3-4 pm 3-4 pm Average Session Duration Average Session kwh 15 minutes 18 minutes 18 minutes 6.0 kwh 8.5 kwh 8.5 kwh

5 kwh of energy Usage has increased in the last 11 months, corresponding with steady EV sales in the

6 Fee vs Free Session length and energy usage is about the same for both DCFC stations Peak usage is different for these two stations: The free station is used mostly in the morning and lunch time hours, indicating people are using the public station to fuel their vehicle for free rather than charge at home or work The fee-based station is used mostly in the afternoon, which indicates that when EV batteries run low, the driver will stop to charge or top up before heading home for the day Station A Free Station B Fee Peak Time of Use 8 am, 12 pm 3-4 pm Average Session Duration 21 minutes 18 minutes Average Session kwh 8.6 kwh 8.5 kwh

The fee-based station is used mostly in the afternoon, which indicates that when EV batteries run low, the driver will stop to charge or top up before heading

7 Typical Time of Use of DCFC City Center

8 Typical Time of Use of DCFC Major Freeway

9 Typical Time of Use of DCFC Major Freeway (Free)

10 Typical DCFC Session Power Curve

11 DCFC with Storage to Avoid Demand Charges DCFC without internal battery Peak Demand 15 min. DCFC with internal buffer battery Peak Demand Reduction Peak Demand Stored Energy AC Input from the Grid = Demand Charges DC output to the EV (10% AC/DC conv. Loss)

DCFC with internal buffer battery Peak Demand Reduction Peak

12 Summary EQUIPMENT CHOICE Choose a provider that can work with various charger manufacturers with different configurations Use open standards to prevent vendor lock-in and access to more equipment choice PRICING Time-based fee incentivizes users to get the amount that they need rather than topping off their battery after reaching 80% $9 per hour results in an average session fee of $4.63 Pricing the station so that the total session fee is under $5.00 Choose a provider that allows a flexible fee structure (time, kwh or flat fee, with ability to have minimum fee BATTERY STORAGE Consider storage to offset high demand charges and feeder bottlenecks

reaching 80% $9 per hour results in an average session fee of $4.63 Pricing the station so that the total session fee is under $5.

Integration of Electric Vehicles National Town Meeting on Demand Response + Smart Grid May 28, 2015

Integration of Electric Vehicles National Town Meeting on Demand Response + Smart Grid May 28, 2015 DCFC Network: Greenlots North American Footprint Q2 15 Hawaii Total Public DCFC Greenlots DCFC Greenlots