Quote:
Originally Posted by Truenorth00
A lot of those figures though are based on:
1) Little supercharger use.
2) Teslas with great battery management systems.
Can't design your infrastructure with the assumption that every EV will be a Tesla.
|
My intent was to counter your claim that, "I'm fairly sure there's no OEM out there that is okay with owners charging almost exclusively by fast charging." It is true that Tesla is ahead when it comes to battery management, but the others aren't all that far behind. Even Nissan have announced that their new Ariya will have active thermal management. The warnings in the owners manual are more of a CYA statement by companies that don't have much experience with BEVs and a carryover from early LEAFs that had faulty batteries and were passively air cooled.
Quote:
|
Here I am not thinking of fast chargers per se. Put a 15 kW Level 2 charger and that might be good enough for quite a few people.
|
Although in theory, AC charging has a maxim rate of 19.2 kW (80A at 240V), in practice the on-board chargers in most cars max out well below that. Even new* Teslas (North American models) now max out at 11.5 kW (48A at 240V), and some have a 7.7 kW (32 amp) charger.
Why? Because higher capacity on-board capacity chargers are larger and heavier.
These are all based on split-phase, 240V charging. Most commercial charging stations are supplied by 3-phase, 208V power (though only use 2 of them). Since the charger is current limited, not power limited, the power is further derated (< 10kW for 48A and < 6.7kW for 32A).
* Older models could charge faster, as can European models that have 3-phase, on-board chargers.
Quote:
|
I think of my family's car use and outside of trips we are doing about 60-100 km a week. Recovering most of that on a grocery store trip for a decent price would be good. Almost preferable to installing expensive fast chargers and jacking up the rate.
|
.
.
.
Quote:
|
Most people grocery shop at least once a week. And usually, they are spending a half hour or more from time they plug in till they unplug and drive away. Think of your typical trip from the time you park till the time you drive away. The question is one of what charge rates are appropriate to meet the needs of those shoppers. From my example above a decent higher end Level 2 charger would be sufficient. For somebody else, they might need a fast charger to fill up while at the store.
|
Lets say that in winter you can get an average of 5 km/kWh and you take an average of your above weekly mileage of 80 km, that works out to 16 kWh per week. Even if you could charge at 11.5 kW continuously, you would need to charge for > 80 minutes per week. With 10kW it is > 95 minutes and with 6.7kW it is > 140 minutes. As a result, even 30 minutes twice a week wouldn't be enough so you will have to find somewhere else to charge as well.
Maybe you would be willing to inconvenience yourself that way, but most wouldn't. To encourage widespread EV adoption, we need to provide a way for people to charge where their car is parked for the longest.
Quote:
|
This is all great in theory. But in reality, few condo owners are actually going to go through this. Especially if there is significant opposition from other residents (usually based on real or perceived concerns on cost sharing). Even fewer still will be motivated, when the fruits of all that legwork is a higher bill than most homeowners.
|
I never said it would be easy, but it would be the fastest way to accomplish this.
Quote:
|
This is exactly why I've said that government could accomplish more giving out subsidies for chargers in such situations than for the cars. Most boards aren't opposed to installing chargers. They just don't want to pay for something that benefits a single digit percentage of owners. And most owners already stretching for an EV, aren't usually likely to then want to pay full freight for a charging station too.
|
In 2019, Canada introduced the
Zero-Emission Vehicle Infrastructure Program (ZEVIP), which would subsidize installation of charging stations at (among other locations) Multi-Unit Residential Buildings (MURBs). Unfortunately the Request for Proposals (RFP) for that type of project is now closed.
Just because other jurisdictions are targeting grocery stores doesn't mean that they are the best place to have them. I am not opposed to them being there, I don't see them as being a high priority. The focus for standard (Level 2) charging stations should be places people park for multiple hours at a time.
Quote:
|
This is similar to the discussions we have about VIA and HFR. There's the issue of marginal return. Spending $30M to put multiple rows of fast chargers at every OnRoute will do an order of magnitude more to spur EV adoption than adding coverage for areas with few residents. Not that I am opposed to spending on chargers in remote areas. But it's bordering on absurd that we're worrying about edge cases when EV ownership is still far from easy for millions of drivers who actually live in cities.
|
With that analogy, the vast majority DC Fast Chargers should be in Toronto, with maybe a few in Ottawa and none anywhere else. The thing is, most people don't rapid charge near where they live, but along the route they travel. It is traffic volume that is important, not population. Sure the 400 and 401 have a lot of traffic, but they are well served by DC fast chargers. What about all of the other 400 series highways that don't have OnRoute service centres. There are also other provincial highways that are very well used but lack rapid charging infrastructure.
As previously discussed, a perfect example of this is Hwy 7, arguably the best route to drive from Ottawa to Toronto in an EV as it shorter, requiring fewer charges en-route. There are currently only charging stations in Carleton Place, Havelock, Norwood and Peterborough. From central Ottawa, Carleton Place is only 50km, so really too close to be worth a stop, but Havelock is 230km and there is only 1 station, so if it is busy or broken, you have to continue to Norwood, which also only has 1 station.
Optimally you want charging stations at least every 100km, not because you need to stop at every one, but because people are starting from different places and wanting to stop at different intervals. Having said that, it is far more important to have multiple chargers at a single location than it is to have multiple locations close to each other (within a few kilometres). This is so that when someone shows up at a location, they have confidence that a charger will be available for them and not have to drive around trying to find one.
Quote:
|
Fair point. And that's why it's hard to look at any EVs for the millions who stay in multi-unit dwellings, because even the publicly installed infrastructure doesn't make EV ownership economical. At these rates, why bother with a BEV? Just buy a fuel efficient econobox or a hybrid.
|
All the more reason to charge your car at home most of the time.
The cheapest option is to own your own charging station and pay for the electricity yourself. If that isn't feasible, the second best option is to have shared semi-private stations (sort of a co-op) where you pay both a maintenance fee and a usage fee. If that isn't possible, using a public station that offers a paid subscription that lets you get a discounted rate would be third best option.
Quote:
|
I look at the current situation and it's as though the entire framework isn't meant to promote EV adoption, so much as it is designed to make it cheaper for suburban homeowners to commute. As somebody who cares deeply about the decarbonization, that is quite a bit disheartening. I can only imagine how much more turned off, people who care less about issue get.
|
It is designed to give EVs a shot in the arm to encourage their development. It is expected that in about 5 years, BEVs will reach cost parity with ICEVs and subsidies will no longer be necessary.
If we really want to get the best bang for the buck, we should be encouraging fleet vehicles to be electrified. Electrifying a vehicle that drives a couple hundred kilometres a day will do far more to reduce emissions than one that drives a couple hundred kilometres a week or less.