Price per kWh or price per min charging. Which do you prefer?

Price per kWh or price per min charging. Which do you prefer?

Price per kWh or price per min charging. Which do you prefer?

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Read it Too  2019 Bolt. Average commute speed 68 MPH. This is my 90% charge results. 4.3 mi/ KWH. Really amazing. Seems almost as good as a Tesla for 1/2 the cost.

41 thoughts on “Price per kWh or price per min charging. Which do you prefer?

  1. It depends on the car.

    Per min is cheaper for fast charging cars: EV6, Ioniq 5, Taycan, etc

    Per kwh is cheaper for slower charging cars: Bolt, Leaf, Cooper Se, etc.

    Toss up for middle of the road cars: ID.4, Mach-E, e-tron

    For fairness, I would say by kwh is better. Then everyone is paying equally for their power consumption, that way it does matter if it takes your car 15 min to add 50kwh or 1hr to add the same amount, the cost is the same.

  2. I had exactly the same thought coming back from a Washington trip today, EA per kWh was 4 times the cost of EVgo per minute model

    Personally I think it needs to be a hybrid – likely a tiered per minute model, or perhaps a tiered registration fee based on the car you utilize and how quickly it can charge (charge more “membership” for faster charging cars).

    EV charging has low throughput and high setup costs when compared to gas stations, as such a charge for utilizing a space has to factor in somehow and per minute does that quite nicely. It sucks for slower charging cars but a space is a space, it’s costs more to rent in Manhattan than it does in Bozeman! So a bolt using the only working 350kw charger (which happened to me today) needs to have a penalty attached

  3. Time-based creates an incentive for charger operators to limit the speed, or at the very least deprioritize faulty gear, in order to maximize revenue. kWh is fairer across the board and makes a lot more sense.

    Really, though, the only reason that we see time-based metering is because in many states, to sell electricity by the kWh, you have to be regulated as a utility. Those laws are changing to exempt EV charger operators and where that’s happening we’re starting to see time-based metering disappear.

  4. Guess it all depends on how fast your car charges, when i used a 250kw EA charger to charge my Polestar 2, it was $0.43 which cost $10.97 for 25kwh. So at that min rate $0.32 40min to go from 20-80 would most definitely be cheaper $12.80

  5. I think there are logical reasons to go with price-per-minute – when charging space demand outstrips supply, chargers at restaurants, etc, but overall I think that kind of thing should be handled with a case-by-case surcharge.

    But overall I think the fairest way to set the price is on the actual consumable being delivered, charge me by the kWh please!

  6. Until the charging network is more reliable and ubiquitous, I think they should charge by the minute to encourage people to get as much as they need and move on, making the station available for the next person. The limited resource is charging station time, not electricity, so charge for that.

  7. Taxi fares are composed of flag fall, per km and per minute components.

    A fairer pricing scheme for EV charging would mimic that, even if it’s hard to estimate ahead of time what your charge will end up costing.

    Governments should remove restrictions on selling electricity by kWh, since such rules make no sense.

  8. Per min for the fast cars, per kWh for the slow cars. My Bolt is cheaper to refill per kWh but u/ecodweeb saves tons of money when paying per minute in his Etron. The reverse is also true. I’ll spend less in a Bolt per kWh but the Etron will be quite a bit more, sometimes double for the same highway range.

  9. It’s very simple math. If you draw an average of more than 1kWh per minute, by time is better. Actually since EA charge 0.32/min vs 0.43/kWh, you can draw as little as 0.75kWh/min. In my Ioniq5 I pay 1/3 the amount on the the per time basis. Actually I pay nothing, but I would pay.

  10. Imagine paying for fuel by the second. They’d just slow down the pumps to make you pay more. I want to pay for what I use.
    I see the point to avoid hogging, some in UK used to kick you off after 40 mins, some charge you £10 per hour if you’re still plugged in after 90 mins which makes sense.

  11. I think cost per kWh is more fair. That being said, for my particular use case (Kia Niro EV, charging at Electrify America) it is MUCH cheaper at the per-minute locations (16 cents/minute, 12 with Plus plan) vs 43 cents/kWh, 31 with plan

    EDIT: the Niro averages about 60kW fast charging from 20 – 80%, so roughly 1kWh/min, which makes the comparison simple.

  12. In Wisconsin the Tesla Superchargers are time based with a high speed low per min rate, and a low speed higher per min rate. Unclear what the speed threshold is, but it encourages you to be brief. So if you start charging at a low state of charge, you’re getting more kWh/$ at the higher charging rate. But if you start at a higher state of charge, it’s slower and more expensive.

    Last year it was the lower rate for the first 15 minutes (maybe 20) and then went up to the higher tier, again encouraging short bursts.

  13. I don’t really care since I so rarely use DC fast-charging. But I would probably prefer per KWH so I can easily compare it to charging at home.

    But I expect high prices at DC fast-charging stations….I am paying for the real estate, the charging equipment, the maintenance, and least of all, the electricity.

  14. I think right now it makes more sense for per minute charging. People are new to the charging game and we’re seeing more people waiting to charge at these stations now. Pre minute people understand the longer you take up a charger the more you’re going to pay. Once there is more capacity down the road charge pre kWh. Hopefully by that time will already be trained to charge and go. They will also know their car better so will know how much they actually need to charge.

    I’ve seen a lot of people in cars like the EV6 traveling like 100 miles and they will charge to 90% just encase.

  15. Whichever is cheapest… Haha. Tesla per minute used to be drastically cheaper than per kWh, but then they jacked up pricing across the board and added a third tier so I’m not sure anymore…

  16. Think German pricing scheme is the best

    First four hours: per kWh
    After four hours: 0,1€ per minute blocking fee

    Really competitive prices and penalty for those who block the chargers without need.

  17. Some (minority) of charging companies in Norway has per kWh only up to 80%, then adds a per minute fee. For fast chargers.


    For slow chargers (type 2) per minute fee is fine, since you get the same amount anyway.

  18. Easy

    price per kWh up to 80% where most drop off, then per kwh + per minute

    Make more 50-100kwh chargers available where people usually stop for food or a nice view, many restaurants here have 2-8 50kw installed with both ccs and chademo.

  19. I think per kWh is the most fair, but I think there should be tiered pricing based on rate. A 350 should be slightly less expensive than a 150 which is slightly less expensive than a 50. This would build in the additional cost for slower cars occupying space for longer periods of time. This however would only work if EA can actually get their stations together and have a majority of their chargers working correctly.

  20. Price per minute when able to charge quickly, price per kWh otherwise.

    Our usual FCs up here are all capable of charging at pretty much the rate the car requests, so it averages out to about $0.11/kWh. That’s like a third of what it costs to charge *at home*, which is why we’re dealing with the inconvenience and charging at EA.

  21. Both methods have downsides that, if mandated, would need some additional regulation to prevent. For example if they mandate per-kWh charging, you’ll see charging sites starting to cut low-kWh cars off if a high-kWh car is waiting in line. I wonder if the solution is to have half the chargers at a location charge per minute and the other half charge per kWh. Then the fast-charging cars will use the per-minute spots and the slow-charging cars will use the per-kWh spots and “everyone” will be happy…

    Or charge both a per-kWh and per-minute fee, and nobody will be happy, but at least it’s “fair”.

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