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Electric Vehicles and the Energy Transition: Unintended Consequences of Time-of-Use Pricing
Megan R. Bailey
David Brown
Erica Myers
Blake Shaffer
Frank A. Wolak
Review: Insights (Forthcoming)
Abstract
The growth of electric vehicles (EVs) raises new challenges for electricity systems.
We implement a field experiment to assess the effect of time-of-use (TOU)
pricing and managed charging on EV charging behavior. We find that while
TOU pricing is effective at shifting EV charging into off-peak hours, it unintentionally
induces new and larger “shadow peaks” of simultaneous charging.
These shadow peaks lead to greater exceedance of local capacity constraints
and advance the need for distribution network upgrades. In contrast, centrally
managed charging solves the coordination problem, reducing transformer capacity
requirements, and is well-tolerated by consumers in our setting.