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Clean Cities / 1 WESTERN WASHINGTON CLEAN CITIES COALITION Workplace Charging Scott DeWees Clean Cities Co-Coordinator ScottD@pscleanair.org October 17 th 2014
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Clean Cities / 2 Types of Workplace Charging Level 1 charging Level 2 charging DC fast charging
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Clean Cities / 3 Level 1 charging 12 amps / 120V ~1.4KW or 4.5 miles per charge-hour (36 miles per 8 hours) 12 amps / 120V ~1.4KW or 4.5 miles per charge-hour (36 miles per 8 hours)
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Clean Cities / 4 Level 1 charging Pros Least expensive to install Lowest demand charge Potential to retrofit existing garage-outlets Cons Slow charging Metering + revenue recovery difficult* Possibly hazardous Could wear more quickly “Bring your own cord” Future EV energy needs
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Clean Cities / 5 Level 2 charging 14-32 amps / 240 single phase ~3.3-7.7 KW or 11-27 miles per charge-hour (92-215 miles per 8 hours) 14-32 amps / 240 single phase ~3.3-7.7 KW or 11-27 miles per charge-hour (92-215 miles per 8 hours)
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Clean Cities / 6 DC fast charging 3 phase 480 volts 25-50 KW (~50 miles in 20 minutes) 3 phase 480 volts 25-50 KW (~50 miles in 20 minutes)
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Clean Cities / 7 Level 2 charging Pros More range per hour Potential for multiple charges per day Smart chargers allow for metering + revenue recovery Cord management Data and management functions Cons Per-unit costs higher Smart technology incurs reoccurring costs Demand charges
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Clean Cities / 8 Level 2 “smart” charging
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Clean Cities / 9 Level 1 charging Outlet or charger 1.4-1.8 KW (5- 6 miles per hour of charging) Restrict access? Level 2 charging Simple chargers or networked chargers Charger output (3.3 KW – 7.2 KW) Single post or dual post Mixed use? fleet or public Several decision points
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