Economist Makes the Case For Slow Level 1 EV Charging (cleantechnica.com) 44
Longtime Slashdot reader Geoffrey.landis writes: Economist Phillip Kobernick makes the case that the emphasis on fast-charging stations for electric vehicles in the U.S. is misplaced. According to an article from CleanTechnica, he argues that, from an economic standpoint, what we should be doing is installing more slow chargers. All thing equal, who wouldn't choose a 10-minute charge over a 3-hour charge or a 10-hour charge? But all things are not equal.
Superfast chargers are far more expensive than Level 2 chargers, and Level 2 chargers are also significantly more expensive than Level 1 charging infrastructure, which consists of normal electricity outlets. He points out that we get 4-7 times more charging capability installed for the same cost by going with Level 1 charging instead of Level 2. And given that people often just plug in their electric vehicles overnight, Level 1 charging can more than adequately provide what is needed in that time. The case is examined in a podcast on the site.
Superfast chargers are far more expensive than Level 2 chargers, and Level 2 chargers are also significantly more expensive than Level 1 charging infrastructure, which consists of normal electricity outlets. He points out that we get 4-7 times more charging capability installed for the same cost by going with Level 1 charging instead of Level 2. And given that people often just plug in their electric vehicles overnight, Level 1 charging can more than adequately provide what is needed in that time. The case is examined in a podcast on the site.
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if they don't have a home charger, they need to move somewhere that does.
As someone who has two EVs in my household, if we couldn't charge at home we'd have stuck with ICE. Moving is just not a practical or affordable solution compared against just sticking with cars that run on gas.
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"you will buy an EV for your next car, or you will not be buying a new car"
Fortunately that is not actually a thing.
Re: Fast charging (Score:2)
Most of the expensive charging is a rip-off, someone out to makw fast money and then bail out when it starts to go downhill.
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They're mostly trying to recoup the cost of the installed charger, then get some profit along the way after that. Level 1 is perfect for home, no extra installation needed most of the time (barring making sure you've got the right outlets in the garage).
Level 1 may be ok at work, where' you're parked all day. But with multiple people sharing a limited set of chargers, level 2 is better . Even then Teslas are such battery hogs that it can take 8 hours to charge that way, and they're NOT charging every day
We need both! (Score:4, Informative)
We need both!
Cheap slow chargers near where people live and work.
Fast chargers on travel routes.
nobody needs a fast charger at home, and a slow charger at a highway rest stop is basically useless.
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Review your reasoning with some facts:
>Government requiring no more ICE vehicles, particularly in cities.
>People in cities w/o opportunity to commute via government mass transit are all forced to use vehicles needing charging.
ALL of those people will require access to those slow re-chargers during the workday else they would have been close enough to use the government mass transit.
When in seattle my commute was only 10 miles, an hour+ each way...
You need to run the heater, windshield wipers, and ligh
Re: We need both! (Score:2)
I own a Honda Clarity PHEV. It gets 35-45 miles per charge. Currently reading 200mpg, because I don't have long commutes and an overnight charge (about a buck-seventy here) is sufficient, and if not, I can switch to hybrid mode.
Not for everyone or for every case, but I did my research and it worked out.
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I own a Honda Clarity PHEV. It gets 35-45 miles per charge. Currently reading 200mpg, because I don't have long commutes and an overnight charge (about a buck-seventy here) is sufficient, and if not, I can switch to hybrid mode.
Not for everyone or for every case, but I did my research and it worked out.
Applied sanity over spontaneous virtue signalling. I like it. I tip my hat to you.
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Cheap and slow is for your house only (Score:1)
Cheap slow chargers near where people live and work.
The problem is that means "cheap" charger is only serving ONE individual over most of its life. It's like you built a custom charger for Fred.
Meanwhile the 3x cost "expensive" charger is serving up to 10 people a day.
So that "cheap" charger is not at all cheap and is not really a public good, in that by and large only one member of the public gets to use it, not multiple.
A mix is required. (Score:5, Interesting)
In highway services, the faster the charger the better, you want to recharge and be on your way, just like you do with a gas vehicle.
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Exactly. I generally wouldn't care if charging at home takes 10 hours, I'll be eating, sleeping, and relaxing most of that time.
But if charging on the road takes 10 hours, I need to stick with gas or plug-in hybrid.
Slow charging at work might be useful for some, but would mostly be limited to people who work too far from home to make the round trip on a charge. Hopefully that's a small number.
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I have a 30 amp 240 V circuit in the carport. And the shop has 240 V circuits as well. They are not that rare.
208 V is common in some apartment buildings, can EV chargers deal with that?
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Yes, these are perfect for level 2 charger.
You could also use single phase-neutral and use level 1 charging too
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I think this might be a case where the economist is using different than normal terminology, or may not have actually done the charging math.
He talks about 10 minute, 3 hour, or 10 hour charge. Thing is, with a modern Tesla or similar EV, level 1 charging isn't 10 hours. 60 kWh@1500 watts is 40 hours.
I mean, he has some point - there are certainly EV owners out there who don't bother with anything past level 1 charging at home and do just fine. I just think that for most use cases level 2 charging is a m
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I think this might be a case where the economist is using different than normal terminology, or may not have actually done the charging math.
Which is to say he's an economist, he doesn't really know what he is talking about.
The larger point he makes may still be correct. We may be able to get more economic benefit from putting our major effort into making slower chargers ubiquitous. The large of capacity of most EV's goes unused most of the time. A PHEV that gives you 25 miles can easily be charged with a standard outlet overnight and fully charged the next day. That is the typical daily use for many people no matter what vehicle they own. The
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.
There are, of course, people for whom this isn't enough. But for the vast majority whose roun
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The trick here is that you plug in when your car is parked. If you're going to the mall to spend a few hours, a level 1 charger is to replenish the charge it took getting f
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A good point on "lots of chargers" - but I think I'd still want 240V, even if it's only 3kW or so. It gives you enough overhead in case of longer commutes or the need to stop charging for a bit in load leveling strategies.
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The trick here is that you plug in when your car is parked. If you're going to the mall to spend a few hours, a level 1 charger is to replenish the charge it took getting from home to the mall.
I'm just gonna assume that by "mall" you meant places people actually go these days. If you have charging at home, dealing with slow chargers is an unnecessary hassle, unless they're providing free juice. Even then, sometimes I'd rather just take a closer parking spot.
If you don't have charging at home, owning an EV is a major hassle that isn't going to be remedied by expecting that people are going to want to deal with constantly plugging in and unplugging their cars everywhere they go. I have an EV bec
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Yeah... level 1 chargers are useless for EV's with big battery packs like an Hummer EV or a Tesla Cybertruck. The total charge time from 20% to 100% would be measured in days, not hours.
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The goal isn't a full charge from 20% though, it's intended to be more like a top-off. IE you have a 10 mile commute to work, do you really need a level 2 charger? 1kWh ~ 3 miles. 8 hour shift should be enough for around 12 kWh, or 36 miles. More than enough.
My concern is that I spent time in Alaska and North Dakota - where we plugged in block heaters regularly. I'll admit that plugging in at above zero temperatures isn't the same level as plugging in at -30, but it still adds up to annoyance if you ha
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Yeah, we need a mix.
But indeed there is a case, let's say at target for 5 fast charger and 50 slow chargers. If slow chargers are that cheap to install, then having many can be useful. Essentially, anywhere you stop, you plug in while you shop. Unless you are particularly low on battery, slow charge is probably fine.
The question is how much cheaper are they? My guess is that a significant cost in installing L1 charger is to dig for wirering, to set up the commercial station and things of that sort. These co
no fast chargers (Score:2)
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People driving gas vehicles will NOT put up with waiting hours to charge their vehicle.
See, this is where EVs *could* have an edge - slow chargers are helpful in places where people are doing something other than charging their car, and don't need a full tank. Movie theaters, malls, houses of worship, theme parks, laundromats, gyms, concert venues, sports stadiums...if they're going to be there for an hour anyway and they can add an extra hundred miles to their range, that's a nifty bonus.
Now, you're absolutely right that a dedicated EV charging location isn't going to do itself any favors by
My case for slow chargers (Score:3)
I want a fast charger when I am on a road trip.
I want a slow charger when I am close to home.
Here is why. When I go to Target, I hook up to a charger that will fill my car in less than 15 minutes. After that, it is something like a $1 a minute to just park there. The charge station is too expensive for people just sitting there so they have to charge that to keep availability high. 15 minutes barely enough time to get through the checkout line let alone a 2 hour shop. And have you ever taken the wife to Target?
My best case is that the whole lot is filled with slow chargers that don't charge much if anything for post-charge parking time. That would be the same for office parking lots and such. I have seen some cities talk about adding charge stations to parking meter sites on a large scale (tap local lamp-post for power and make revenue from the infrastructure). That's the right direction.
Parsing (Score:3)
My best case is that the whole lot is filled with slow chargers that don't charge much if anything for post-charge parking time.
Had to read it three times.
It's all statistics. Parkmeter == chargers. (Score:2)
It is scary to take your EV or a long trip. A trip that takes you outsize it's range. This is where a system of fast charger is needed.
But if the most of the driving is home-work-home with occasional home-shopping/entertainment than you need charges at home and at work and these can perhaps be slow as you have whole night or work day to charge. You just need them at every parking place, just like parkmeters the city.
Idiot economist (Score:2)
As everyone knows, Americans are too poor to install fast charging. Not. Idiot economist reinforces the stereotype of idiot economists.
In other news, economist is idiot. (Score:2)
Slow charging is good, yes, and you should use it whenever practical. I always try to charge at the lowest practical current during the daytime when I have excess solar. It is only really a practical solution at home or at work though.
But there are times where I need the full 240V/48A, even at home. And, when driving more than 400 miles in a day you really need over 100kW chargers available for mid-trip charging.
240VAC single phase is a "normal" outlet! (Score:2)
30A 240VAC circuits are nothing special: it's what electric clothes dryers plug into, among other things. I installed one for maybe $50 in parts including circuit breakers, and the Level 2 EVSE ("charger", which it isn't) came with my car.
120VAC household circuits are too slow and it's not a great idea to run any circuit at capacity for a heavy duty application like this: stuff gets hot and maybe does Bad Things in the middle of the night.
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If I were to setup an apartment complex with chargers for tenants, I would go with installing a level 1 charger at around 12 amps. The 120VAC single phase circuit is going to be a lot cheaper to bring into a panel service of each tenant, which a sized for an oven and not usually a dryer. As dryer circuits are not typically on the tenant panel but on the complex's larger panel.
Not that I know of any apartment complexes installing EV chargers in every space. But I think they should. Or rather EV technology ne
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6/3 romex is around $4.00/foot (vs. $1.25/foot for 12/3) at Home Depot, so labor is going to dominate costs.
If I rolled in at 10:00PM with 10% remaining on my 60kWh battery and needed to drive somewhere far in the morning, I'd be bummed to come out at 6:00AM and find only 12kWh had been delivered of the 54kWh needed to fill 'er up. Level 2 @ 6.6kW would probably have it at 95%+ in the same tim
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If I were to setup an apartment complex with chargers for tenants, I would go with installing a level 1 charger at around 12 amps.
Actually, the neat thing about electricity is that if you double the voltage you can push twice the total wattage through the same gauge wire. There's even an outlet standard for 240v at 15A: NEMA 6-15 [homedepot.com] You'd use exactly the same wire as you would for a 120v 15A circuit, so there's no additional costs.
It's not a common plug standard used for EVSEs, but Tesla does sell a NEMA 6-15 adapter for their Mobile Connector.
Who's "we"? (Score:2)
what we should be doing is installing more slow chargers
Does he mean me? Because I'll put in whatever I want and can afford in my own garage. I don't have to go along with some consensus on what society or economists think is best.
Does he mean public chargers? Publicly funded? Because there, he is right. Sort of. If you look solely at the kW delivered per public dollar spent, then Level 1 (slow) chargers are best. But if you add in the opportunity cost of time spent waiting, they are next to worthless. The only place that Level 1 chargers make any sense are in
Opinion (Score:2)
I, personally, would not purchase an EV if I didn't have the ability to charge at home. One of the stronger value propositions of EVs is waking up to a "full tank" every morning.
Level 1 charging *at home* is one of those 80% things. 80% of the time it'll cover my needs just fine. 20% of the time I'll have to go looking for L2 charging. L1 charging when out and about is a hard 100% no. The "miles per hour" you can pump across a 120V circuit is just too low.