Next to Tesla, Plug-In Hybrids Are an Illusion of Eco-Consciousness

AS I WAS RAGING NORTH toward Switzerland in the 735kW Ferrari SF90 Stradale in July, I was feeling pretty good about myself. After all, I was saving the Earth.

The Stradale is a plug-in hybrid electric vehicle (PHEV)—powered by a twin-turbo V8 (about 581kW) assisted by three electric motors and a lithium-ion battery pack. The idea is that Juan-Philippe Cliente, or his manservant, will plug in the Ferrari at night so that it may provide electric-only driving range in the morning. Notionally, the Stradale’s hybrid design will allow it to operate in European cities’ low-emission zones.

With its battery fully charged (7.9 kWH), the Stradale can achieve admirable efficiency of 4.6l per 100km, according to the EPA. But penny-pinchers need to check the fine print. That applies only to the first 13km. Practically within sight of my hotel in Maranello, Italy, the Stradale had devolved into its baser, grumbling, petrol-powered nature—albeit with a kind of Prius-of-the-gods electric torque assist.

Thirteen kilometres.

The Stradale has plenty of company in Crazytown. The PHEV version of the Bentley Bentayga can waft silently only about 29km, officially; the Jeep Wrangler 4xe, 33. Porsche Cayenne E-Hybrid, 27. These short electric legs—combined with powerful internal combustion (IC) engines—do almost nothing to improve overall fuel efficiency. Why do manufacturers even bother?

Like most PHEVs—only slightly more so—the Stradale is a compliance baby, with a powertrain designed to meet soaring vehicle emissions/consumption requirements in major vehicle markets, using de minimis electrical systems added to IC powertrains. In some respects PHEVs are a technical echo of a time not long ago—2010—when such machines were being showered with public money and held to wildly unrigorous standards.

To cite but one notorious example: The Stradale (US$663,623, as tested) qualifies for $3,501 in public money meant to encourage reduced consumption. Thirteen kilometres.

That party is about to be over. Under the Biden administration, new federal PHEV standards are expected to be more “robust,” in the gentle lingo of policy makers.

How robust? In many respects the California Air Resources Board (CARB)—with authority to set its own vehicle emission standards and penalize offending automakers—is already there. For example, the state has a price cap of $60,000 for qualifying vehicles in the state’s Clean Vehicle Rebate Project. As of April 6, 2021, qualifying PHEVs must also achieve a minimum 48km of EPA-measured electric range to qualify for the Clean Vehicle Rebate Project tax credit. By dint of this one rule change, California buyers of more than a dozen new PHEV vehicles, from Bentleys to Volvos, no longer qualify.

Sacramento is now drafting the state’s Advanced Clean Car II language, applying to model-year vehicles beyond 2025. Qualifying PHEVs might then need to deliver a proposed 80km of all-electric range. The state may also put a 15% cap on what are called “historical” PHEV credits claimed by a manufacturer.

What comes next is a fight over standards and timetables, credits and penalties. Mercedes-Benz, GM, Toyota and Stellantis NV, to name four big pickup/SUV players in the U.S., need PHEVs to contribute to their bottom-line Corporate Average Fuel Economy (CAFE) and other emissions targets for the balance of the decade. They will also need consumer-facing tax credits because, with two power systems aboard, PHEVs typically cost several thousand dollars more than a conventional vehicle.

You might be wondering how it all could have gone so wrong for PHEV, a powertrain architecture that once seemed so logical as to be inevitable? In brief, there are two kinds of PHEVs: short-range and long-range. PHEVs with more than about 37 miles of EV range—like the Chevrolet Volt (2011-2019)—do meaningfully displace petrol-driven kilometres, reduce emissions and save consumers money, according to a 2019 report by UC Davis International EV Policy Council.

But short-range PHEVs—the vast preponderance on the market—don’t, except in limited conditions. Why? It’s behavioural. Studies show that the shorter a vehicle’s all-EV range, the less likely owners are to bother charging overnight. And, when owners don’t charge overnight, PHEVs calculations of efficiency go upside down in the morning. Actually, a short-range PHEV with a flat battery is lugging around a lot of useless weight.

Charging PHEVS on the go can also be comically difficult since few are capable of fast-charging.

PHEVs may yet have a bigger problem: NOX, or nitrous oxide, a hazardous smog-forming product of combustion. At a workshop in May, CARB officials raised concerns about PHEVs’ excessive NOX emissions during full-power cold starts, as when an IC engine kicks on after a period of electric driving. One probable explanation: Emission-scrubbing catalytic converters in exhaust systems only work after they are well heated by the exhaust stream, typically requiring 20 seconds or so. It’s most cars’ dirtiest seconds; PHEVs often spend them with wide-open throttles.

In November the environmental pressure group Transport & Environment published a study of the emissions of the popular BMW X5, Mitsubishi Outlander, and Volvo XC60 plugins. The study observed that, even with a fully charged battery and in optimal conditions, the emissions of these vehicles were 28-89% higher than the official value. In cases when the battery went flat, emissions jumped three to eight times higher than listed. And, as when a PHEV runs the petrol engine hard to charge the battery, the report says emissions were up to 12 times higher.

In a preamble to the report, Julia Poliscanova, senior director for vehicles and e-mobility at T&E, blasted the EU’s incentives for PHEVs and raised the spectre of emissions scandals past. “Plug-in hybrids are fake electric cars, built for lab tests and tax breaks, not real driving.”

Wait. Me first. PHEV-ilgate? That’s not right. PHEVigate? Pffffevul-gate?

The dangers of misrepresentation and misunderstanding are real. Consumers unclear on the difference between a fuel-electric hybrid (like a Toyota Prius) and a plug-in electric vehicle, might not even know to plug their cars in. Imagine the Stradale owner when it dawns on him it’s not 4.6l/100km all the time.

The manservant better have some answers.

Many people considering an electric vehicle are turned off by their prices or the paucity of public charging stations. But the biggest roadblock often is “range anxiety”—the fear of getting stuck on a desolate road with a dead battery.

All EVs carry window stickers stating how far they should go on a full charge. Yet these range estimates—overseen by the Environmental Protection Agency and touted in carmakers’ ads—can be wrong in either direction: either overstating or understating the distance that can be driven, sometimes by 25% or more.

How can that be? Below are questions and answers about how driving ranges are calculated, what factors affect the range, and things EV owners can do to go farther on a charge.

How far will an electric vehicle go on a full battery?

The distance, according to EPA testing, ranges from 516 miles for the 2023 Lucid Air Grand Touring with 19-inch wheels to 100 miles for the 2023 Mazda MX-30.

Most EVs are in the 200-to-300-mile range. While that is less than the distance that many gasoline-engine cars can go on a full tank, it makes them suitable for most people’s daily driving and medium-size trips. Yet it can complicate longer journeys, especially since public chargers can be far apart, occupied or out of service. Plus, it takes many times longer to charge an EV than to fill a tank with gas.

How accurate are the EPA range estimates?

Testing by Car and Driver magazine found that few vehicles go as far as the EPA stickers say. On average, the distance was 12.5% shorter, according to the peer-reviewed study distributed by SAE International, formerly the Society of Automotive Engineers.

In some cases, the estimates were further off: The driving range of Teslas fell below their EPA estimate by 26% on average, the greatest shortfall of any EV brand the magazine tested. Separately, federal prosecutors have sought information about the driving range of Teslas, The Wall Street Journal reported. Tesla didn’t respond to a request for comment.

The study also said Ford’s F-150 Lightning pickup truck went 230 miles compared with the EPA’s 300-mile estimate, while the Chevrolet Bolt EV went 220 miles versus the EPA’s 259.

A GM spokesman said that “actual range may vary based on several factors, including things like temperature, terrain/road type, battery age, loading, use and maintenance.” Ford said in a statement that “the EPA [figure] is a standard. Real-world range is affected by many factors, including driving style, weather, temperature and if the battery has been preconditioned.”

Meanwhile, testing by the car-shopping site Edmunds found that most vehicles beat their EPA estimates. It said the Ford Lightning went 332 miles on a charge, while the Chevy Bolt went 265 miles.

That is confusing. How can the test results vary so much?

Driving range depends largely on the mixture of highway and city roads used for testing. Unlike gasoline-powered cars, EVs are more efficient in stop-and-go driving because slowing down recharges their batteries through a process called regenerative braking. Conversely, traveling at a high speed can eat up a battery’s power faster, while many gas-engine cars meet or exceed their EPA highway miles-per-gallon figure.

What types of driving situations do the various tests use?

Car and Driver uses only highway driving to see how far an EV will go at a steady 75 mph before running out of juice. Edmunds uses a mix of 60% city driving and 40% highway. The EPA test, performed on a treadmill, simulates a mixture of 55% highway driving and 45% city streets.

What’s the reasoning behind the different testing methods?

Edmunds believes the high proportion of city driving it uses is more representative of typical EV owners, says Jonathan Elfalan, Edmunds’s director of vehicle testing. “Most of the driving [in an EV] isn’t going to be road-tripping but driving around town,” he says.

Car and Driver, conversely, says its all-highway testing is deliberately more taxing than the EPA method. High-speed interstate driving “really isn’t covered by the EPA’s methodology,” says Dave VanderWerp, the magazine’s testing director. “Even for people driving modest highway commutes, we think they’d want to know that their car could get 20%-30% less range than stated on the window sticker.”

What does the EPA say about the accuracy of its range figures?

The agency declined to make a representative available to comment, but said in a statement: “Just like there are variations in EPA’s fuel-economy label [for gas-engine cars] and people’s actual experience on the road for a given make and model of cars/SUVs, BEV [battery electric vehicle] range can exceed or fall short of the label value.”

What should an EV shopper do with these contradictory range estimates?

Pick the one based on the testing method that you think matches how you generally will drive, highway versus city. When shopping for a car, be sure to compare apples to apples—don’t, for instance, compare the EPA range estimate for one vehicle with the Edmunds one for another. And view all these figures with skepticism. The estimates are just that.

Since range is so important to many EV buyers, why don’t carmakers simply add more batteries to provide greater driving distance?

Batteries are heavy and are the most expensive component in an EV, making up some 30% of the overall vehicle cost. Adding more could cut into a vehicle’s profit margin while the added weight means yet more battery power would be used to move the car.

But battery costs have declined over the past 10 years and are expected to continue to fall, while new battery technologies likely will increase their storage capacity. Already, some of the newest EV models can store more power at similar sticker prices to older ones.

What can an EV owner do to increase driving range?

The easiest thing is to slow down. High speeds eat up battery life faster. Traveling at 80 miles an hour instead of 65 can cut the driving range by 17%, according to testing by Geotab, a Canadian transportation-data company. And though a primal appeal of EVs is their zippy takeoff, hard acceleration depletes a battery much quicker than gentle acceleration.

Does cold weather lower the driving range?

It does, and sometimes by a great amount. The batteries are used to heat the car’s interior—there is no engine creating heat as a byproduct as in a gasoline car. And many EVs also use electricity to heat the batteries themselves, since cold can deteriorate the chemical reaction that produces power.

Testing by Consumer Reports found that driving in 15- to-20-degrees Fahrenheit weather at 70 mph can reduce range by about 25% compared to similar-speed driving in 65 degrees.

A series of short cold-weather trips degraded the range even more. Consumer Reports drove two EVs 40 miles each in 20-degree air, then cooled them off before starting again on another 40-mile drive. The cold car interiors were warmed by the heater at the start of each of three such drives. The result: range dropped by about 50%.

Does air conditioning degrade range?

Testing by Consumer Reports and others has found that using the AC has a much lower impact on battery range than cold weather, though that effect seems to increase in heat above 85 degrees.

I don’t want to freeze or bake in my car to get more mileage. What can I do?

“Precondition” your EV before driving off, says Alex Knizek, manager of automotive testing and insights at Consumer Reports. In other words, chill or heat it while it is still plugged in to a charger at home or work rather than using battery power on the road to do so. In the winter, turn on the seat heaters, which many EVs have, so you be comfortable even if you keep the cabin temperature lower. In the summer, try to park in the shade.

What about the impact from driving in a mountainous area?

Going up hills takes more power, so yes, it drains the battery faster, though EVs have an advantage over gas vehicles in that braking on the downside of hills returns juice to the batteries with regenerative braking.

Are there other factors that can affect range?

Tires play a role. Beefy all-terrain tires can eat up more electricity than standard ones, as can larger-diameter ones. And underinflated tires create more rolling resistance, and so help drain the batteries.

Most EVs give the remaining driving range on a dashboard screen. Are these projections accurate?

The meters are supposed to take into account your speed, outside temperature and other factors to keep you apprised in real time of how much farther you can travel. But EV owners and car-magazine testers complain that these “distance to empty” gauges can suddenly drop precipitously if you go from urban driving to a high-speed highway, or enter mountainous territory.

So be careful about overly relying on these gauges and take advantage of opportunities to top off your battery during a multihour trip. These stops could be as short as 10 or 15 minutes during a bathroom or coffee break, if you can find a high-powered DC charger.

Before embarking on a long trip, what should an EV owner do?

Fully charge the car at home before departing. This sounds obvious but can be controversial, since many experts say that routinely charging past 80% of a battery’s capacity can shorten its life. But they also say that charging to 100% occasionally won’t do damage. Moreover, plan your charging stops in advance to ease the I-might-run-out panic.

So battery life is an issue with EVs, just as with smartphones?

Yes, an EV battery’s ability to fully charge will degrade with use and age, likely leading to shorter driving range. Living in a hot area also plays a role. The federal government requires an eight-year/100,000-mile warranty on EV batteries for serious failure, while some EV makers go further and cover degradation of charging capacity. Replacing a bad battery costs many thousands of dollars.

What tools are available to map out charging stations?

Your EV likely provides software on the navigation screen as well as a phone app that show charging stations. Google and Apple maps provide a similar service, as do apps and websites of charging-station networks.

But always have a backup stop in mind—you might arrive at a charging station and find that cars are lined up waiting or that some of the chargers are broken. Damaged or dysfunctional chargers have been a continuing issue for the industry.

Any more tips?

Be sure to carry a portable charger with you—as a last resort you could plug it into any 120-volt outlet to get a dribble of juice.