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Technical Paper

Comparison of EVSE Charge Management Systems for Limited Electrical Infrastructure

2020-04-14
2020-01-0532
The installed cost of EV charging stations can vary widely depending on site specific conditions and the number and type of EV charging stations (EVSE) to be installed. The cost can exceed $10,000 per 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 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: 1) fully autonomous/local control, 2) networked/cloud managed control, and 3) a hybrid of local and cloud managed control.
Journal Article

Electric Grid Integration Costs for Plug-In Electric Vehicles

2014-04-01
2014-01-0344
This paper evaluates the hidden costs of Plug-In Electric Vehicle (PEV) integration into the electric grid. The topic of PEV infrastructure is traditionally associated with the direct costs of installing chargers. However, there is also the indirect cost of infrastructure upgrades required upstream of the customer service point (meter). This is a case study of indirect infrastructure costs for PEV integration along with ways to mitigate and manage this cost transferred to customers for the Sacramento Municipal Utility District (SMUD). The costs are estimated using Monte Carlo methods applied to the geospatial and temporal diversity of SMUD's distribution network. An estimate of economic value added by Time of Use (TOU) incentives and Smart Charging for SMUD's service region is also provided.
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