The U.S. Environmental Protection Agency (EPA) wants to reduce the energy consumption of electric vehicle supply equipment (EVSE) by developing its first ENERGY STAR specification for this category of products. As we know, electric vehicle (EV) chargers are idle for the majority of the day, and the specification will address the amount of power consumed while not in use.
The ENERGY STAR program will initially focus on alternating current (AC) (Level 1 and 2) charging, but the EPA is also looking at direct current (DC) charging.
According to the EPA document:
“Emerging EVSE could include features such as the ability to receive DC power from PV panels or local storage; provide DC power to other devices in a building via USB, Ethernet, or other power transmission medium; supply AC power to a building or specific appliances; coordinate power distribution with other entities in the building; include electricity storage internal to the EVSE; and enabling transmission of power from a vehicle to a home.”
Enabling DC chargers to share the incoming power via USB, AC power, Ethernet, or other media is an interesting way of getting more value out of available power. DC chargers are only used in short bursts for fast charging, so finding ways to smartly manage them as a building resource makes sense. Building in a power converter enables the charger to integrate into other stationary devices, such as using DC power from a solar panel locally instead of sending it back to the grid where its value is often less. I haven’t seen any DC chargers that can do this today, so it will be interesting to see how manufacturers develop products with these capabilities.
Paying to Park
Car Charging is looking at increasing the utility of EV chargers through a different approach. The company is assessing a fee of $0.08 per minute to EV owners who leave their vehicles plugged in but not charging for longer than 15 minutes after the charging session ends, according to PluginCars.com. The 15-minute grace period seems sensible, as many customers receive automated alerts when charging is completed. The fee is a considerable incentive for people to be conscientious about moving their cars after a completed charge, which makes them available for other (revenue-generating) charging sessions, which is critical for EVSE to become profitable.
At the EV Roadmap Conference starting July 29 in Portland, Oregon, I’ll be moderating a panel where several industry luminaries will be discussing the latest innovations in smart EV charging. Stop by and check it out, or leave a comment here with questions for the panel.
Tags: Electric Vehicle Supply Equipment, Electric Vehicles, EV Charging, Transportation Efficiencies
| No Comments »