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Nighttime charging of EVs may overburden the grid

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Re: Nighttime charging of EVs may overburden the grid

#61
post #14

Earlier quoted context omitted.

This assumes you can have your car plugged in during the day. It people drive to work and cannot plug in their car, then most of the time it will only be plugged in at night.

Hopefully the ability to charge at work becomes more popular.

And further increase traffic problems and the continued blight of cities designed for cars? I can't see anything that encourages people to start driving to work as a good thing sorry.

Re: Nighttime charging of EVs may overburden the grid

#62
post #48
post #37

Earlier quoted context omitted.

"As we know them" vs "future" You can both be right here. There are many current challenges that prevent people from choosing an EV or against rapid majority adoption. We also have to consider that alternative methods of taxation (how to pay for roads) and the eventual reduction in tax incentives are problems that still need to be solved. I'm also looking forward to the EVs that come out 1-2 decades from now with bat…

> We also have to consider that alternative methods of taxation (how to pay for roads) and the eventual reduction in tax incentives are problems that still need to be solved. Are roads really payed from gas taxes? Everywhere? I perhaps naively assumed all the taxes go into a big bucket which is used to pay for all kinds of things, including roads. Somehow even relatively poor countries manage to have good roads. We w…

"Are roads really payed from gas taxes? Everywhere?"

Fuel taxes are quite common. In some areas they do make up a large component of the road funding. Finding a replacement for them is a major issue.

"Somehow even relatively poor countries manage to have good roads. We will save elsewhere. Most of the taxes go into the social bucket in most countries (retirement, social security, health, education) anyway."

This doesn't make any sense and lacks factual support. How do the poor countries pay for the roads, and which counties are these? What are we saving and where? The majority of current taxes going to social programs has no relevance to this discussion. If we're eliminating a current tax and having the same service costs (or more due to increased weight), a new one will need to take it's place.

Re: Nighttime charging of EVs may overburden the grid

#63

Earlier quoted context omitted.

When I worked at Kaluza our smart charging solution allowed you to set a minimum % that your EV would always charge to, prior to any smart charging taking place. So as soon as you plugged in it would charge to the minimum value you set.

That was the first thing I checked when I investigated this feature on my phone. Annoyingly it is an "AI driven smart feature" that is not adjustable. I would love it if it charged to 75% right away and then waited till the morning to finish.

At some point iOS added AI-driven "smart charging," and the first time I woke up to an 80%-charged phone, I disabled that feature.

Re: Nighttime charging of EVs may overburden the grid

#64

Earlier quoted context omitted.

BEVs are currently more expensive than ICE but BEVs will be less expensive in less than 10 years as the technology continue to improve. ICE technology doesn't have much room left to improve after 100 years so it's impressive that BEVs will surpass ICE so quickly.

BEV is limited by availability of raw materials. Copper, Lithium. It is actually predicted that there will be shortage of batteries for following decade, thanks to lack of available lithium and subsequent processing capacities and shortage of copper thanks to fact that we already maxed out output of current copper mines. So there is no reason for BEV to be cheaper, more less it will keep being expensive or will get e…

If there is a shortage of raw materials, companies will work to get them to fulfill the demand.

Re: Nighttime charging of EVs may overburden the grid

#65

Earlier quoted context omitted.

Hopefully the ability to charge at work becomes more popular.

And further increase traffic problems and the continued blight of cities designed for cars? I can't see anything that encourages people to start driving to work as a good thing sorry.

Most of the forms of travel that are energy and space efficient are typically not time efficient due to inherent tradeoffs. Nothing saves time, space, and energy simultaneously like not commuting in the first place. To butcher an old phrase, "Think globally, live locally".

Universal-ish WFH dramatically undercuts the need for both energy and infrastructure (which also takes energy) and will allow us to scale back both dramatically (e.g., multi-lane roads), while saving lives and giving employees more life flexibility.

Advocates for public transportation (for environmental reasons, particularly) risk fighting the last war. They should shift focus to WFH instead. I really don't understand why Greens and Labor don't push for WFH mandates (for environmental and quality of life reasons, respectively). Probably too tied to the commercial real estate industry.

Re: Nighttime charging of EVs may overburden the grid

#66
I am so tired of misinformation like this. I know they use the "may" get-out-of-jail-free card in the title, but no, nighttime EV charging will not overburden the grid by 2035, as the article purports, because "the grid" (?) will look dramatically different in 13 years. Plus, networked software solutions are already baked into EVs for time of day charging; as such, its a solved problem unworthy of a headline. The additional load will require new investment, but thats core to the business of providing power. If they can't adapt over a decade with software solutions helping them along, EVs aren't the problem...

The actual report from NREL (1) linked to the article is far more informative and interesting and eludes that clickbait headline, but still makes ham-fisted assumptions that make the whole report a little goofy. To list a few:

- "Absent systemic changes in customer behavior" (you mean no changes except mass customer purchasing of EVs? what's the point of assuming nothing changes)

- Slide 18 shows, for high EV adoption with no charging logic, effectively, "everyone definitely plugs in their EVs at 9pm because thats when TOU kicks in", while also showing "Almost nobody charges at work during the day". Most people will plug in whenever they get home. With WFH, that is basically any random time of the day. Also, they acknowledge people respond to TOU, but dont acknowledge that TOU can change?

- "At-work charging makes up a small portion of total EV charging, so the system benefits are likely to be small" (are they really assuming no changes here over a decade? I would love to charge at work but my office building has no services. These will become commonplace over time. Is this really their

EDIT: this is fun! here's the actual model from the NREL report! This launches a virtual machine, which might take a minute to boot up. Once the model has opened, click on ‘Cell > Run All’ to initialize the script’

https://hub.gke2.mybinder.org/user/skoeb-co-ev-model-rkichrt...

(1) https://www.nrel.gov/docs/fy19osti/73303.pdf

Re: Nighttime charging of EVs may overburden the grid

#67

The more detailed Nature article that this report is based on is open access (no paywall) and readable here: "Charging infrastructure access and operation to reduce the grid impacts of deep electric vehicle adoption" https://www.nature.com/articles/s41560-022-01105-7 The suggestion to use more daytime charging is specific to California, since California's future energy trajectory is weighted toward more solar. A stat…

Thing to consider with current electric car range and median driving habits most people won't have to charge their car everyday either. If I had a Chevy Bolt I'd only need to charge it once a week at my rate of driving. An arrangement where Tuesday is my day to use the charger at work would be 'fine'

Re: Nighttime charging of EVs may overburden the grid

#68

And, the attachment of many EVs to the Grid after enabling their innate V2G (Vehicle to Grid) ability will revolutionize them: https://www.teslarati.com/tesla-unlocks-vehicle-to-grid-abil...

I don't know about that. Consider after a natural disaster, like Florida right now, or Texas last year. If every vehicle is low on energy (say, by trying to flee), and they are all trying at once to charge, that may overwhelm the grid. V2G only works assuming mass numbers of people aren't driving all at once, or trying to recharge their vehicles all at once. The fail condition needs to be: What happens if 80% of EV o…

V2G (among many other things) is an optimization. Past the point where you stop actually wasting inputs, optimization is the enemy of resiliency. It trades lower costs for an inability to handle extreme fluctuations.

Re: Nighttime charging of EVs may overburden the grid

#69

Earlier quoted context omitted.

And further increase traffic problems and the continued blight of cities designed for cars? I can't see anything that encourages people to start driving to work as a good thing sorry.

Most of the forms of travel that are energy and space efficient are typically not time efficient due to inherent tradeoffs. Nothing saves time, space, and energy simultaneously like not commuting in the first place. To butcher an old phrase, "Think globally, live locally". Universal-ish WFH dramatically undercuts the need for both energy and infrastructure (which also takes energy) and will allow us to scale back bot…

You seem to be replying to my original comment which I deleted on realising it didn't make sense in the context of the GP post about taking advantage of charging EVs at the office. FWIW almost nobody in the downtown area (CBD) where I work drives there, it'd be crazy to try. Luckily for me it's a 15 minute bike ride (mostly bike paths) and there's good end-of-trip facilities.
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