NICK POPE
CONTRIBUTOR
Electric vehicle (EV) chargers have a high malfunction rate while charging infrastructure remains inadequate in some areas, according to a new study by the Harvard Business School (HBS).
The HBS study used artificial intelligence to examine more than one million customer reviews of charging stations from North America, Europe and Asia over 10 years, finding that EV drivers can expect non-residential charging systems to not work approximately 20% of the time and also that some of America’s more rural regions are effectively “charging deserts.” Its findings are the latest to suggest that the Biden administration’s long-term vision for an EV-dominated future is struggling to make early progress.
“Among other things, the deep dive into tomorrow’s gas station network estimates that drivers can successfully recharge their cars using non-residential EV equipment only 78% of the time, highlighting critical issues with reliability,” reads an article on the study posted to HBS’ website. “The research proves that frustration extends beyond ‘range anxiety,’ the common fear that EV batteries won’t maintain enough charge to reach a destination.” (RELATED: Biden Admin Classifies Martha’s Vineyard, Elite Locales As ‘Low-Income’ To Push EV Charger Subsidies)
Charger reliability, and perceptions thereof among consumers, have proven to be a stubborn obstacle for EV adoption.
“Imagine if you go to a traditional gas station and two out of 10 times the pumps are out of order,” Omar Asensio, the climate fellow at HBS’s Institute for the Study of Business in Global Society and the study’s leader said, according to the article. “Consumers would revolt.”
Additionally, the HBS study also identified consumers’ uneasiness about inconsistent and opaque pricing when they go to charge up their EVs. HBS characterizes the pricing environment examined by the study as a “Wild West,” with consumers often left guessing as to how much they will have to pay to recharge.
The Biden administration, meanwhile, is forging ahead with its aggressive EV push. Federal agencies have issued several stringent regulations that will significantly increase the share of EVs manufacturers sell over the next decade, and the administration also unleashed billions of dollars to facilitate EV production and adoption.
The White House has stated its goal of having EVs make up 50% of all new car sales by 2030, a goal that will require a massive buildout of public EV charging stations. Congress gave the administration $7.5 billion in the 2021 Infrastructure Investment and Jobs Act to construct public EV chargers, but that program has to date only led to a handful of stations coming online.
Administration officials, including Transportation Secretary Pete Buttigieg, have defended the program and its progress to date. Congressional Republicans have expressed skepticism that the program is rolling out according to plan.
One factor that has apparently slowed progress on the $7.5 billion program is the Biden administration’s insistence that prospective grantees ensure their work advances diversity, equity and inclusion. (RELATED: Here’s Another Way The Biden Admin Is Routing EV Charger Subsidies Into America’s Wealthiest Neighborhoods)
Currently, most of the country’s EV charging infrastructure is concentrated in coastal, more densely-populated regions of the U.S. while more rural regions in the heartland lag behind, according to the Department of Energy (DOE).
“Public charging stations are not equally distributed across the U.S., concentrated more heavily in large population centers and wealthy communities and less so in rural areas and smaller cities,” the HBS article reads. “The result is that drivers have disparate experiences, well-served in some areas and starved in others. Some parts of the country have become ‘charging deserts,’ with no station at all.”
Specifically, counties in Washington state and Virginia do not have a single public charger and have actually lost previously-available chargers, according to the article. The study also notes that some EV drivers have had problems with internal combustion engine vehicle drivers parking in EV charger parking spots, thereby denying access to the chargers.
The study is the latest in a string of recent papers and surveys suggesting that the administration’s EV agenda is struggling to gain traction in its early stages. A recently-published McKinsey and Company analysis found that nearly half of American EV owners want to purchase an internal combustion engine vehicle the next time they go car shopping, and nearly half of all respondents in an Associated Press poll released in June indicated that they are unlikely to consider an EV for their next car purchase.
“It’s different than what any one company or network would want you to believe,” Asensio, who is also affiliated with Georgia Institute of Technology. “I couldn’t even convince my mother to buy an EV recently. Her decision wasn’t about the price. She said charging isn’t convenient enough yet to justify learning an entirely new way of driving.”
Neither the Department of Transportation nor the DOE responded immediately to requests for comment.
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Say what you want about electric cars, I see Teslas on the road nearly every time I’m out and about. Other makes are probably there too. Electric cars are here to stay whether WUWT fans like it or not.
Disclosure: We have a hybrid electric Ford Escape.
Sure, there are plenty of Teslas around, I live in a city. So it works for some people. Just don’t try to shove EVs down our throats as a one-size-fits-all solution.
And if the subsidies ever stop they might become less ubiquitous.
Every place that has ended the subsidies, has seen the sales of EVs plummet.
It’s not just the subsidies, it’s also the mandates.
They are fleet or company cars….
No, in our community, they are personal cars – some of our neighbors love them. When stopped at an intersection, we see lots of Teslas, and lots of really large SUVs.
We do live 15 miles from the Pacific Ocean, in a major conurbation, so it is no surprise to see lots of EVs. (Other brands are represented.) And this is a pretty wealthy part of the country.
It is no surprise that charging station / charging points are located on the coasts, and in the wealthy prats of the country – that is where the EVs are.
There is often one pump out of order at one of our local gas stations, with 12 pumps. The rest of the stations seem to be able to keep all their pumps working all the time.
Lastly, a six-charging-point charging station was recently put into service in a local shopping center. The charging points were set up on each end of three parking spaces – not drive through lanes – so only one charging point can be used for each space. 6 charging points, maximum available, 3. I’d love to have a chat with the “engineers” who designed that station.
“” Electric cars are here to stay whether WUWT fans like it or not.””
Electric cars are owned only by those that can afford the costs of it. Personally, I am ambivalent on people buying EVs – if there are no subsidies. But there are and they are coming to an end….
They won’t be contributing to the cost of road maintenance- they may drive up the cost of auto insurance for all of us- the bigger demand on the power supply may drive up cost, etc., etc. It might be worth be less ambivalent.
“… the cost of road maintenance …”
Road Usage Charge (RUC) is the concept being adopted by States to address the problem. There is variation that, I think, will shake out similar to tax-at-the-pump. Meaning that states with high adoption will have a higher RUC; CA for instance. Montana lower.
Maryland just passed a $500 per year registration tax on EVs.
Will that pay for the roads or the fire damages?
“Electric cars are here to stay whether WUWT fans like it or not.”
4, 5 maybe 6 years.
Then a long stay in a secluded scrap yard.
Electric cars have been ‘here’ since the 1900s – I wonder the roads aren’t jammed with them by now.
Yes .
” ….the deep dive into tomorrow’s gas station network…..”
and tomorrow never comes …
😉
Just wait, it’ll be here…tomorrow
Oh and Free Beer Tomorrow… On me
There are wealthy people everywhere. The non wealthy don’t want them and can’t afford them.
So do I, but for the same reason that I see Ferraris, Bentleys and Rollers – money! I live in an affluent urban area.
Drove through Lincolnshire last month and saw hardly any EVs and none of the others.
I live in NSW country.
Around here is a mix of small cheap cars, V8 sedans, big family SUVs, big 4WD trade vehicles and very big trucks.
And lots of motor bikes on the weekends.
Only EV I know of is a small local corporate one I see occasionally.
I drove from an upscale area of southeastern Michigan to a wealthy summer home area in northern Michigan last week. I saw plenty of Teslas and even some Rivians on both ends of the trip but none on the freeway. I wonder why.
And how would you feel if EV mandates were suddenly removed and governments relented and petrol cars were here to stay?
Those PHEV Hybrids will become gilded golf carts once mandates remove petrol from consumer purchase options. You’ll have a battery EV with a 35 mile 55k range.
I would still be getting 36 mpg on the highway in my minivan. I would still be driving around town on the battery, providing the cost of electricity weren’t too high.
I get 36+ mpg in my Nissan Rogue and have no battery to recharge. Just the 12V standard car battery that most ICVs have in common. Still driving around town on Gas
However, like me, you will only get that mileage on GAS as long as GAS is available to purchase retail. Otherwise you will be limited to battery range without gas availability
Your Rogue is
If they banned gasoline, my van would be the least of my worries.
BTW, I don’t have to charge the high voltage battery. As a bonus for the hybrid, the 12 volt battery does almost nothing. I think it runs some dashboard functions. The high voltage battery is used to start the car. So, I have owned this van since Feb 2019 and put 60,000 miles on it and the 12V battery is still working great. My relatives with Hondas and Toyotas complain their batteries go dead every three years. This is a well known issue with those brands, because they undersize the battery to save weight.
There are approximately 2.5 million EVs out of a total of 283 million vehicles registered in the US. I wouldn’t call 0.88% a large portion of the vehicles on the road. I don’t think the early adopters and Musk fans can really make the market long-term.
If you live in or near a wealthy urban area, you’ll see a much higher percentage. Out in the rural, not-so-wealthy areas, a much lower percentage.
I live rather rural. I’ve only ever seen one Tesla truck, and that was in San Jose. I’ve seen maybe a dozen Tesla cars (or maybe the same one multiple times?) and those were all in cities. I have never seen anything electric (that I could identify as such) around where I live.
EVs buyers need to pay $7,500 as a surcharge to help control the growth of the national debt and its interest cost that now exceeds the defense budget.
Disclosure: Hybrids are not EVs. Hybrids have been available for over 20 years and sell well because they are reliable and give very good gas mileage. No soup for you.
Electric cars have always been there, and even after the subsidies and mandates go away, they will still be there.
Despite your protestation, no one hates EVs. What we hate are the mandates and being forced to pay for other people’s choices.
As to your choices, you have my condolences. When do I get a thank you for helping to pay for it?
Mr. Case: “Electric cars are here to stay….” Not sure if that’s a threat, but it sounds just like something Tom Edison might have said, say, 110 years ago. Edison would have thrown gasoline on Will Rogers’ dog to stop folks from buying ICE. The build-up for EVs didn’t just start yesterday, and it won’t collapse overnight, but collapse it will, they are not here to stay anymore than they were “here to stay” in 1910.
In 2023, sales of electric vehicles made up just 7.6% of all car sales . . . not even 1 out of every 10 cars sold.
Yes, with their
— high purchase price, even with government subsidy, compared to equivalent ICE vehicles
— limited range on a full battery charge under normal conditions
— extremely reduced range in cold (<0 °F) weather
— time required for recharging versus time to re-fill the gas/diesel tank for an ICE-powered car
— very poor resale value
— impact on the electric power generation and electric grid infrastructure (and $/kWh pricing),
electric cars are here to stay at about this same percentage of sales, based on recent news of flat, even declining, EV sales.
Your comment has nothing to do with the Harvard study.
Electric cars have been in the US since the 19th century. According to the Department of Energy, William Morrison, from Des Moines, Iowa, created the first successful electric vehicle in the US in 1890.
I live in one of those rural places. I see hybrids but not much in the way of full BEV’s. They don’t make sense up here with hot summers and cold winters.
The state I live in has gotten grants through the government for installing charging stations. Apparently they’ll be putting one of in our area. Source of the electricity will be a coal fired plant that is supposed to be closed by 2030. Then what?
One thing about the so-called transition is the amount of valuable metals etc needed to try to make it happen. So, what are the weak spots? Well, one such weak spot is copper cables.
Older readers may well remember the old problem of petrol tank syphoning which was later made impossible, but EVs aren’t that easy to protect.
“”As first revealed by This is Money a year ago, owners of electric cars are falling victim to a new crime wave sweeping the UK – thieves are stealing their charging cables. The cables, which are required to recharge the cars, then either selling the copper it contains as scrap – or simply selling the cable on the second hand market for up to £200. “”
https://www.thisismoney.co.uk/money/cars/article-10530305/Now-thieves-new-target-electric-cars-charger-cable.html
What about charging stations?
“”Just before 2 a.m. on a chilly April night in Seattle, a Chevrolet Silverado pickup stopped at an electric vehicle charging station on the edge of a shopping center parking lot. Two men, one with a light strapped to his head, got out. A security camera recorded them pulling out bolt cutters. One man snipped several charging cables; the other loaded them into the truck. In under 2½ minutes, they were gone.””
https://apnews.com/article/electric-vehicles-charging-cables-stolen-copper-tesla-5f003686cade63fade2e8d7dd3402f3a
So what’s the answer?
“”Padlocks have been used as security devices for decades. Even just the sight of one can act as a deterrent. This is probably the simplest way to secure an EV charging cable, and there are several ways you can approach it.
Firstly, you can purchase a chain, preferably with a plastic sleeve, and pass it through the charging cable and the spokes of the wheel. Then fit the padlock by passing it through the hole in the plastic sleeve, locking it to secure it.
Alternatively, you can use a long shackle padlock. Pass it directly through the hole in the cable’s plug, or into the trigger.
You could also buy a cord lock and use it together with a padlock to secure the cable. Use the pivots of the cord lock to secure the cable, then protect the cord lock with a padlock.
Our buyer’s guide to padlocks will help you choose the right model for your needs.””
https://www.barrybros.com/2022/05/how-to-protect-your-electric-vehicle-charging-cable-from-theft/
As for availability, if the petrol station happens to be closed – ie for a delivery – then there’s another one down the road.
Some people park with a wheel on the cable
I haven’t seen that – yet, but I have seen cables run – unprotected – across the carriageway to the other side of the road with vehicles running over them.
I have also seen domestic extension cables run along the pavement on the same side of the road because the vehicle owner could not park outside their house – and their charging point.
Bright sparks? There could be.
A number of our neighbors charge their EVs in their drive, using a long cord. I suspect that either the garage is full, or they are concerned about a battery fire.
But the driver had the money to buy the car!
Sounds pretty rough on the insulation.
The scrap yard does not care if the plug is on the wire. They pay by weight of copper. 3 AWG and larger copper wire is worth well over $2 ($) per foot. Five charging stations cables equals about 50 feet and well over $100 (US)
This is a societal problem.
We need to get back to putting thieves in jail, for longer and longer terms.
The old “chain gang” needs to be brought back. Make “hard labor” part of every jail process. If nothing else with sledge hammers breaking rocks to gravel, as in the OLD DAYS.
The damage movies such as Cool Hand Luke caused in public perception is how liberals have eroded punishment for criminal behavior. PUNISHMENT needs to be the ONLY use of incarceration, no more “rehabilitation”.
IF there is rehabilitation, it MUST be paid for by charities, not government. Give Gates and the other oligarchs something worthwhile to spend their massive amounts of money on.
BTW: I doubt most readers here understand what chain gangs were all about. Each county had their own sheriff and jail. When trouble makers were jailed, the harsh conditions in one county would tend to get them to move along to another jurisdiction knowing each successive interaction with THAT county’s sheriff would mean longer incarceration.
Just like the introduction of three strikes laws moved felons from state to state before liberals did their best to blunt the great effect those laws had in getting criminals off the street for LONG terms.
Now having a law makes no difference when a liberal AG can just use “prosecutorial digression” to let all the liberal activists out. AND they can charge a former president with a crime never used before to prosecute ANYONE.
I don’t know what but something must be done about “prosecutorial digression”. Obama use that to create the “Dreamer” fiasco while violating his oath of office to “faithfully execute” the law of the land. Perhaps federal felonies for different levels of “obstruction of justice” by failure to prosecute at the state or local level?
We need to get back to putting thieves in jail
based on usurbrain’s estimate, they can steal up to 474 feet in CA without worry.
Ummmm . . . did you mean that to apply to Democratic or Republican politicians, or both?
So, in addition to the higher cost of EVs, higher insurance rates, higher maintenance cost (think tires), there is not the cost of securing the charging cable.
I am waiting for someone to develop a cable that can siphon off charge from one battery to recharge another.
Typos R US….
there is
notnow the cost….My thought is that the cable needs to be part of the EV.
Plug the cable into the EV and the other end into the charger….just like at home, the appliance has a cable to be plugged into the wall.
Then…ta-da. no more stolen charger cables.!!!
Increases by a minute or so the time to steal it. Pop the trunk and take the cable.
If the cable is locked, how does a user recharge their EV?
Also, our petrol stations don’t’ close while fuel is being delivered.
Things that have driven past me in the last few days:
I wonder how many Teslas are going to be on the roads 50 years from now.
I don’t know but I’m sure it will be a nice round number.
Net zero…
“ 50 years from now.”
Let’s see.. that is maybe 10+ battery replacements !.
So… probably not many !
Go watch the Woodward Dream Cruise. There are about 40,000 vehicles from all over the world. I’m sure some collector’s Teslas will be there in the future.
Electric Cars are noting but a FAD!!! Like hula hoops, disco and bell bottoms etc. etc. etc.
They’ve been selling Tesla cars for almost 20 years now. How many people were wearing bellbottoms and listening to disco in 1995?
EVs have a use case. They make a great 2nd car for someone with a garage who never needs to drive the 2nd car more than 50 miles from home.
Not to feel old, but 1995 was 29 years ago.
While EVs can be used as a second car, they are still much more expensive to own and operate than a small ICEV.
Absolutely true here in Northern California, where the PG&E rates are $0.42 per
kW/hr, and $0.53 over the baseline amount.
So an EV will cost about $0.14 to $0.17 per mile, vs a 30 mpg small ice car, like a Corolla , with $3.95 gas , is $0.13 per mile.!!!
Even a hybrid Corolla is not worth the added cost. The break even point is about 150,000 miles of driving at our $3.95 gas cost.
So, I’m an ‘ice guy’ forever.
Might want to check your home owners insurance policy to see if the cover a house fire caused by a BEV catching fire in you garage.
Like any novel technology there are niche applications.
When golfing, I appreciate the lack of noise and exhaust of an electric cart versus the gas carts.
Those little surreys used to transport people at amusement parks is also good.
Niche is not massive or totalitarian.
“Imagine if you go to a traditional gas station and two out of 10 times the pumps are out of order,”
Except there is usually another one, or more, within a few miles.
The paucity of battery chargers is most likely due to the unavailability of electric supply, either no cabling at all, or existing cabling of insufficient rating to carry the load. Fast-chargers draw a big load.
The Nitwits in Government see chargers, are obsessed with unreliables, but don’t realise there has to be something in between.
Generally on the opposite corner across the street.
Another nonsense article. It isn’t a HBS study. It is an AI symposium paper, of which all the authors are at Georgia Tech. Only the last author claims some affiliation with HBS. It seems he spent a year on leave there.
As to what the study is really about, they summarise it thus:
“In this paper, we investigate the plausibility of using large language models to solve these data challenges regarding scale and cost. Developing automated approaches using generative AI is important because understanding large-scale coordination of price behavior is essential to managing the smart adoption of EVs and directed investments in pub-lic infrastructure. Here we demonstrate the capabilities of the zero-shot learning of GPT-4 (OpenAI, 2023) with expert prompting to extract price scheme information at a national level. Prior research has demonstrated that transformers and other neural networks (i.e., CNNs, RNNs, and BERT) can AAAI Fall Symposium Series (FSS-23)54 …”
Here’s how to refute an article whose conclusions you disagree with:
At the least you pick one important sentence from the article and then try tp explain why that sentence is wrong.
Attacking the source or motives of the author is leftist style “debate” — something that losers do when they can’t refute the conclusions in the article … or at least provide a link to another source with different conclusions.
A lot of that goes on on both sides of the discussion. Of particular annoyance is when the media does it.
“At the least you pick one important sentence”
Well, the headline seems a reasonable place to start. But then I picked the para from the paper starting
“In this paper, we investigate…”
I don’t disagree with the paper. I just point out that it has been thoroughly misrepresented.
And you were wrong.
Got yer own battery car yet, Stokes?
Nick is in or near a small country town in Victoria.
He almost certainly has a nice big diesel or petrol SUV or ute.
An EV would only be useful as a powered shopping cart to the local store.
So he has a convenient out for his hypocrisy.
Always fun to add yet another disadvantage or problem with EVs to the already huge list.
Sales have finally stopped rising at a fast rate as people discover BEVs cost more and provide less value.
I doubt if many BEV owners will take many long trips with their BEVs because “refueling” is a problem even when a working charger can be found near your route.
Here is one reason that not many charging stations are not being built that I recently discovered:
Three out of four EV charging developers say they can’t get enough electricity for their stations
Three out of four EV charging developers say they can’t get enough electricity for their stations | Just The News
Free Wall Street Journal article on high EV insurance rates. No paywall.
Nice EV You Got There—Can You Afford to Insure It? – WSJ (archive.li)
Bizarre results at Ford in 2024 through May
According to Ford’s monthly reports on deliveries, sales in 2024 through May:
Sales of the F-150 Lightning surged by 78.5%, to 13,093 units.
But sales of the ICE F-150s fell by 9.7% to 273,885 units.
Experian Q1 US vehicle registration data:
Toyota RAV4, Tesla Y and Honda CRV all had a larger market share than the Ford F150 in Q1 2024. Note that the Ford F150 was the best selling US vehicle.in 2023, and in 41 prior years
B. S. I have, on numerous occasions, pulled into service stations and have discovered that one or more pump heads are covered in plastic bags (typical out of order sign) and witness no driver revolt. You either wait 5 minutes for the next patron to finish, rendering a pump available or you go across the street to the other station and fill there.
Just another Harvard Bull Shite (HBS) study
EV owners may revolt (but their lot revolts over the Cause DuJour at the drop of a hat) given that they often need to wait an hour for their 1100lb fuel tanks to fill. Petrol users are a far better crowd being that they only have to wait 5 minutes for a full tank and so are less stressed at the end.
Do you understand the difference between occasionally pulling into a gas station and having one or two pumps be broken, and consistently finding 20% of all rechargers non-functional?
We have 3 supercharger stations in my town and never have I seen any of them out of order
Nor have I seen any of them (20 chargers each) with any more than 3 or 4 Teslas using them at any time
How do they indicate whether a charger is working or not, and can it be seen from the roadway?
EVs are settling into their niche ….. short urban driving using home charging.
From the condo to yoga, and then brunch. Not practical to anyone else.
Even if it is practical, it is still more expensive than the ICEV alternative.
You forgot the evening bonfire as the charger/battery ignite the garage….
If EVs are so great, why can’t I buy an affordable BYD from China or Mexico?
Because a) they don’t meet US safety standards, and b) the Chinese government is subsidizing them to obtain hard currency.
By the time you add in all the necessary safety gear and eliminate the subsidy, you’ll have something like the SMART car, with a similar price tag. SMART stopped selling cars in the US. Their last year they sold fewer than 2,000 units. Basically there’s no market for that kind of car in the US.
That does not follow. It’s a non sequitur.
“Imagine if you go to a traditional gas station and two out of 10 times ” … the unit fails to print a receipt. Ruins my day every time. 🙂
If you need a receipt, you can still go inside and get one.
At an early point in my career I was a corporate/national subject matter expert (SME) on battery technologies.
I will never buy an EV. LiPO batteries are disasters with ticking countdown clocks.
Is it just me, or is it the times we live in?
When I saw the word accessibility, my first thought was that the article would be about trouble that handicapped people are having with these chargers.
In his February 7, 2023, State of the Union speech, President Joe Biden declared:
“We’re going to build 500,000 electric vehicle charging stations installed across the country by tens of thousands of IBEW workers.”
The estimated $7.5 billion cost of doing this by 2030 is to be funded as part of the intentionally-misleadingly-named Inflation Reduction Act of 2022. You know, a billion here, a billion there and pretty soon you’re talking about real money! (Well, actually just shifting some electrons in the US national debt accounting computer, hah.)
But in fairness to his failing metal capacity, Biden never said those half-million government-funded charging stations had to be reliable.
Or operable. Or available where needed.
You want an EV? That’s fine with me but you pay full cost for the EV and the charging. It is nonsense that the government helps you with my money. Pay your own way I can’t afford prop you up.
“The HBS study used artificial intelligence to examine more than one million customer reviews of charging stations from North America, Europe and Asia over 10 years”
Total nonsense, but, I come to expect that from Harvard.
Right there, a study using artificial intelligence. That worries me. But can it be any less reliable than the researchers who claim the 97% consensus is real?
Don’t forget, a simple gas pump delivers 25x’s the energy of a supercharger, and, by energy, I mean miles driven by a vehicle (actual work), not BTU’s.
25x is a gross exaggeration
Here is a simple estimate pf 9x in good weather conditions. Very hot, and especially very cold, will significantly reduce BEV range.
I have no idea why anyone would buy a BEV. Or ever takes a long trip in their BEV, they did buy one.
Supercharger from 20% to 80% charge in 30 minutes for a 300 mile range BEV gets only 180 miles of range
Gas station 10 minute stop to get 14 gallons of gas for a 16 gallon Toyota Camry gas tank.
14 gallons x 28 mpg city = 392 miles range
14 gallons x 39 mpg highway = 546 miles
A fair comparison
BEV fast charger gets 180 miles of range in about 30 minutes,
An ICE Camry at a gas station gets 546 miles of highway range in 10 minutes, or 1636 miles of range n 30 minutes with three gas fueling stops.
That is 9x more range per 30 minutes of refueling.
NOTE: It might be possible to supercharge in closer to 20 minutes, and fill a gas tank in closer to five minutes, but I wanted to be conservative.
If you wanted a snack, a drink, or wanted to use a bathroom, they may not be nearby a Tesla supercharger, or may not be open when you charge.
Here is my calculation:
According to various outlets, a Tesla supercharger can add 200 miles in 15 minutes. That is under ideal conditions. A gas pump puts out 150 gallons in those 15 minutes. It doesn’t matter how cold or hot or how many other people are pumping gas at the same time.
A small ICE get 39 miles per gallon. 39 x 150 = 5,850 miles.
5850 / 200 = 29.
Make it a larger ICE, say 33 mpg, gives 25x.
The Toyota hybrid gets 57 mpg, giving a ratio of 42x.
Look at the NY Turnpike. Multiply the number of gas pumps by about 10 to 20 to understand the problem.
I think I see a reason for our different results. You are assigning a flow rate for the gas pump of 3 to 4 gallons per minute. It is actually 10 gallons per minute.
For a car with a 16 gallon fuel tank, refueling takes under two minutes.
EV charging stations have to share the available power. Your calculations assume the maximum power is available but there is likely to be more than one BEV being charged so power per BEV is lower, increasing charge times.
Of course, BEV luvvies live in a perfect world (not accusing you of this) so there is always max power when they need it as unicorn farts are free
I just went past an electric charging station with about 30 bays and one was in use here in Cleveland OH, the last time I passed it they were all empty.