Clean Cities / 1 WESTERN WASHINGTON CLEAN CITIES COALITION Workplace Charging Scott DeWees Clean Cities Co-Coordinator October 17 th 2014

Clean Cities / 2 Types of Workplace Charging Level 1 charging Level 2 charging DC fast charging

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)

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

Clean Cities / 5 Level 2 charging amps / 240 single phase ~ KW or miles per charge-hour ( miles per 8 hours) amps / 240 single phase ~ KW or miles per charge-hour ( miles per 8 hours)

Clean Cities / 6 DC fast charging 3 phase 480 volts KW (~50 miles in 20 minutes) 3 phase 480 volts KW (~50 miles in 20 minutes)

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

Clean Cities / 8 Level 2 “smart” charging

Clean Cities / 9 Level 1 charging Outlet or charger 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