As we forge ahead in 2021, consumers and businesses alike are feeling a sense of cautious optimism. While the personal, political, and professional anxieties from last year won’t go away with the flip of a calendar, we can share reasons for hope for a brighter year ahead. One of those reasons is around a renewed focus on climate action, specifically around clean transportation through electric vehicles (EVs) and the charging infrastructure to support them. This hope is giving many of us a brighter – and greener – outlook for 2021 and beyond.
It’s exciting to see a growing wave of electric vehicle offerings on the horizon, helping create more interest and demand than ever before. But while new makes and models are inspiring, the industry is reaching an inflection point. Making EVs mainstream will require much more than just the vehicles themselves. The U.S. and the world need significantly more charging infrastructure and a stronger overall charging ecosystem to drive true adoption, things my colleagues and I work toward every day.
Let’s think about existing infrastructure as a starting point. Currently, there are well over a million individual gas pumps across the United States, and almost everybody is familiar with how they operate. For reference, there are less than 100,000 individual public chargers, and most Americans don’t know how to use them. The collective ‘we’ have some work cut out for us.
For EVs to really take off, consumers need to start seeing charging stations much more frequently than they do today. And the charging experience needs to take minutes, not hours. That’s why Electrify America is building the nation’s largest open, ultra-fast DC fast charging network, with chargers capable of up to 350 kW. We’re investing heavily to ensure the EVs of today and of the future will be able to charge faster than ever imagined. By the end of 2021, we expect to install or have under development approximately 800 total charging stations with about 3,500 DC fast chargers, including along two cross-country routes.
One of the many benefits of EVs is the ability to offer drivers multiple options when it comes to powering up. Charging is still a new experience for most, so emphasizing this point has been meaningful in our ongoing EV education and awareness efforts. Offering seamless solutions for home and workplace charging, in addition to continued focus on public ultra-fast charging, is helping to build confidence for any driver or fleet operator interested in making the switch to electric transportation.
As enthusiastic as we are about our progress, we know we can’t create the infrastructure and EV ecosystem needed to ignite this revolution alone. We need industry partners, automakers, utilities, businesses, and government to all come together to accelerate our charging capabilities to help spur future EV adoption – and we’re working with many groups to make that happen. A lack of collaboration can crush this movement, which remains in a hopeful, yet fragile place. More investment and partnerships across the board are what will keep the momentum going to adequately handle a growing number of EVs. That’s why we believe continued investment in charging will drive EV adoption, and that all stakeholders should be fully supporting all charging industry growth.
While lack of public charging remains a main deterrent for EV purchase consideration – an issue we are working hard to address – the true beauty of EVs is that between home, public, and workplace charging options, drivers will actually have more opportunities to power their vehicles than gas-powered cars. And that’s a future worth celebrating.
It’s well understood that driving electric is more efficient with a lower cost-per-mile than driving internal combustion vehicles. That’s especially true if you're charging an EV up at home. But what if you need to use public chargers on the road or live in an apartment where a commercial pay-per-use charger is your only option?
The cost can vary significantly since commercial chargers use different methods of payment. For example, many providers charge for the time it takes to charge a battery rather than the kWh of electricity delivered. This would be like gasoline stations charging for the length of time a nozzle dispenses gas in the fuel tank, not by the number of gallons of gas pumped. A few providers charge a per-session fee or require a monthly or annual charging subscription. While many public chargers at businesses and parking lots remain free of cost to EV drivers, that is changing over time.
When you pay by the minute, charging cost is influenced by an EV battery’s state of charge, ambient temperature, and the size of the EV’s on board charger. Different size chargers can mean a big difference in the cost of a charge even though the same number of kW hours are delivered. For example, earlier Nissan LEAFs had a 3.6 kW (3.3 kW actual output) on board charger while later ones had an updated 6.6 kW (6.0 kW output) version. Thus, it takes almost twice as long to charge an earlier LEAF at double the expense than later ones, even though both have the same 30 kWh battery. Many EVs now come standard with a 6.6 or 7.2 kW charger. When considering buying or leasing an electric model, keep in mind that a more powerful on-board charger means quicker and potentially more cost-efficient charging.
It’s an interesting bit of science that while charging an electric vehicle, the rate of charge isn’t linear but rather decreases as a battery approaches full capacity. If an EV has a lower state of charge (SOC) at the beginning of a charging session, charging occurs at its maximum rate, such as 3.3 kW, 6.6 kW, 7.2 kW, and so on. As the battery approaches 100 percent SOC, charging can slow to a trickle. The last 20 percent of charge can sometimes take as long as the initial 80 percent. To be most cost efficient, it’s recommended to only charge to 80 percent full capacity when using a public charger, especially one that includes time-based pricing.
For a charging cost comparison, let’s look at charging an EV with a 40 kWh/100 mile rating and a 50 kW on board charger. At a Level 3 charging station it would take about 48 minutes to get an additional 100 miles of range and cost between $6.24 to $16.80, depending where you did the charging. With a 350 kW fast charger this would take about 7 minutes and cost between $1.82-$6.93 to add 100 miles. This compares to $10.00-$13.33 for a gasoline vehicle that gets 30 mpg and fuels up at $3.00 to $4.00 per gallon. This shows the need for fast charging when away from home and charging with time of use chargers, and more importantly, the need for pricing solely on a per kWh basis.
While kWh charging is fairer to the consumer, some companies prefer time-based charging because the longer customers are connected, the more profit is made. However, public charging could be moving from time-to-charge to the kWh charge model. This will put the energy cost of EV operation in line with that of gasoline vehicles where fueling cost is determined by the cost of a gallon of gasoline, not the time it takes to refuel. Clearly, this change is needed.
New rules in California will eventually ban public charging operators from billing by the minute and require the fairer billing by kWh. The ban will apply to new Level 2 chargers beginning in 2021, and to new DC fast chargers beginning in 2023. Chargers installed before 2021 can continue time-based billing until 2031 for Level 2 chargers or 2033 for DC fast chargers.
The new rules do not prohibit operators from charging overtime, connection, or parking fees, or fees for staying connected after reaching 100 percent SOC, providing they are disclosed. Electrify America already charges 40 cents per minute if your vehicle is not moved within the 10 minute grace period after your charging session is complete. It remains to be seen whether more states will follow California’s lead. Laws will have to be changed in about 20 states where only regulated utilities can presently sell electricity by the kWh.
Charging providers like Tesla and Brink presently charge by the kWh in states where it’s allowed. For example, Tesla charges $0.28 per kWh while Blink charges $0.39 to 0.79 per kWh, depending on location and user status. California regulations require Tesla and others to show the price per kWh and a running total of the energy delivered, just like a gas pump.
Other charging considerations can affect the actual long-term cost of operating an EV. These include lower charge pricing and discounts that come with subscriptions, free charging incentives that accompany a vehicle purchase (like the first 1000 kWh provided free or 100 kWh of free charging per month), or if a charger is shared with another user. For Teslas, free unlimited Supercharger access has often come with the purchase or lease of a new Tesla model.
While EV technology is now relatively mature, pricing electric vehicle use is evolving. Hopefully, competition and a bit of government regulation should ultimately make it as understandable as it is now for gasoline vehicles.