Browse Publications Technical Papers 2020-01-0532
2020-04-14

Comparison of EVSE management systems for sites with limited electrical infrastructure 2020-01-0532

California leads the country in electric vehicle (EV) adoption. As of 2018, over 6% of annual new vehicle registrations are EVs in California. As EVs become more prevalent in the overall vehicle population, more employers are offering workplace charging as a benefit. Additionally, the fleet segment in Sacramento is also experiencing a transition to electrification because of the attractive total cost of ownership associated with EVs and Sacramento’s interest in cutting greenhouse gas emissions to net zero by 2045. Charging infrastructure for fleets and workplace charging tends to have greater complexity than the residential model of 1 or 2 EVSE per garage. The installed cost of EV charging stations can vary widely, depending on site specific conditions and the number and type of EV charging stations to be installed. The cost can be as much as $10,000 per EV charging station, for Level 1 or Level 2 EVSE, if panel or switch gear upgrades are needed or if trenching is required. These infrastructure costs can pose a significant barrier to EV adoption for fleet operators or for employers who wish to provide EV charging for employees. Smart or managed EVSE can play a role in managing the infrastructure and installation cost of EVSE. Such products can enable charging when there are limitations in electrical capacity. Three types of smart EVSE are tested and compared – fully autonomous/local control, networked/cloud managed control, and a hybrid of local and cloud managed control.

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