clean cities / 1 western washington clean cities coalition workplace charging scott dewees clean...
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Clean Cities / 1
WESTERN WASHINGTON CLEAN CITIES COALITION
Workplace Charging Scott DeWees
Clean Cities [email protected]
October 17th 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)
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
14-32 amps / 240 single phase~3.3-7.7 KW or 11-27 miles per
charge-hour(92-215 miles per 8 hours)
Clean Cities / 6
DC fast charging
3 phase 480 volts 25-50 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
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