Implementing Charging Limits: A Potential Solution to Alleviate EV Charging Station Congestion
As electric vehicles (EVs) become increasingly common, the etiquette and norms at public charging stations are still taking shape. A significant point of contention is the misuse of charging stations, including “hogging” spots even after a full charge and using high-output chargers unnecessarily. To address these issues, Electrify America is piloting a new strategy that could reshape charging behaviors and enhance the overall efficiency of EV charging networks.
The Challenge of Charging Etiquette
Many new EV owners find themselves puzzled over the proper protocol at charging stations, where issues like occupying a charging spot beyond the necessary time can create friction. Moreover, some users occupy fast chargers despite their vehicles’ inability to handle maximum charging speeds, akin to slow driving in the fast lane, which frustrates other drivers.
Electrify America’s Innovative Approach
In response to these challenges, Electrify America is testing a solution at some of its busiest Southern California locations. The pilot program involves automatically ending charging sessions when the battery level reaches 85%. This limit is strategically set because charging rates naturally slow down beyond this point to prevent battery overheating, and completing the last 15% takes disproportionately longer, often blocking access for others.
Operational Mechanics and Penalties
Under the pilot, once a vehicle’s charge reaches 85%, the charger will automatically shut off. Drivers attempting to restart the charge will find the charger non-responsive. Additionally, to discourage lingering at charging stations, a grace period of 10 minutes is allowed after which “idle fees” of 40 cents per minute are applied.
Rationale and Consumer Perception
The initiative not only aims to optimize the usage of charging stations but also to educate consumers about efficient charging practices. There’s a broader proposal by Chargeway’s founder, Matt Teske, suggesting that EVs market their range at 80% capacity, framing the final 20% as a “bonus battery” for extended trips. This approach could help shift consumer expectations and alleviate frustrations associated with being cut off before a 100% charge.
Charging Speed Variabilities
It’s essential for EV drivers to understand that not all chargers are created equal, and that vehicles have specific charging capacities. Selecting a charger that matches the vehicle’s maximum charging speed is crucial for efficient use of the infrastructure.
The Larger Context
While there’s an ongoing race among automakers to boast longer driving ranges, there’s also a growing need to educate the public about the realities of EV charging. Setting charging limits like those tested by Electrify America could be a step towards fostering more responsible and efficient use of charging stations, potentially easing one of the major headaches associated with EV ownership.