This type of analysis is pretty difficult though. A modern grid with both solar and wind power is pretty resilient and calculating the amount of storage needed depends on the things like if it has long distance transmission lines (increasing reliance by increasing the geography).
I think this is why a lot of places end up having a gas peaker plant. In terms of running costs it's not great, and the climate impact is bad (although I guess hydrogen helps is that is available anywhere yet). But it's cheap to build ($85M gets you 55MW[2]). These days batteries are cost competitive with that though[3]:
> a 250MW, four-hour (1,000MWh) battery system in New South Wales would be a cheaper option for meeting peak demand than a 250MW new-build OCGT from both levelised cost of energy (LCOE) and levelised cost of capacity (LCOC) perspectives.[3]
[1] https://www.lazard.com/perspective/levelized-cost-of-energy-... (scroll down for storage)
[2] https://www.wbur.org/news/2022/04/08/peabody-peaker-natural-...
[3] https://www.energy-storage.news/battery-storage-30-cheaper-t...
There are 280 million vehicles in the US. If fifty million of those were electric vehicles, then ten years later we'd have enough already-produced batteries to power the entire United States overnight.
There were 300,000 EVs sold in the US in 2020. There were 600,000 in 2021.
This doesn't help right now, but over time, it's becoming clear there will be a flood of cheap batteries available for grid storage.
As a nice side effect, as the market for these used batteries takes off, this might help to assuage fears about expensive battery pack replacements, fueling more EV adoption.
In this dimension, EVs that charge during the midday solar peak and overnight from wind will make an important contribution to rolling out reneweables, cheaper energy and ditching oil and gas.
I'll quote a brief section:
> In general, batteries will be retired from use in an EV when the range and performance is no longer acceptable to the driver. The remaining capacity of the battery at the time of retirement will vary depending on consumer preference, but it is generally assumed to be between 70- 80%.
> Given the large capacity and high performance of modern vehicle batteries, retired batteries could still offer significant value in lower-power, secondary applications, such as storing energy from solar panels to be used in off-grid or peak demand-shaving applications.37
> A growing body of research has examined the environmental impacts and technical and economic feasibility of repurposing batteries for use in second-life applications.38–42 Since repurposed batteries are a relatively new phenomenon, data about their performance is uncertain, particularly because of the uneven degradation of battery cells over time. However, it is estimated that battery lifespan can be extended by 10 years or longer depending on the application.38,43,44
[1] https://calepa.ca.gov/wp-content/uploads/sites/6/2021/12/Fin...
All it takes is for a car scrap dealer to realise that for every EV battery he grabs out and hooks up to the grid he'll earn $200/year. Before long, every scrap dealer will be doing it to every car.
However, I suspect that small players will be barred from the electricity markets via mountains of bureaucracy and certification, so that might not happen.
If people simply hook up an unknown number of batteries of unknown capacities in unknown spaces, how can you rely on the resulting power grid? How can you plan extensions?
Not to mention high capacity batteries are huge fire risks, especially worn out high capacity batteries. Can you imagine how much water you'd need to put out a 200 car battery lithium fire? Iw would be truly irresponsible to let scrapyards build makeshift power storage stations like this.
At scale, everything becomes more predictable, because individual failures no longer have much impact.
Battery operators also will configure their systems to make money, so they will in fact have a big incentive to buy power when it's cheap and sell when expensive, so they will form a strong stabilising force. (unlike say solar, where operators don't track the price and just inject whatever power they produce, even if the spot price of electricity might occasionally go negative, and when it is negative, there is unconstrained overproduction)
There are some important differences. For one, those are using bespoke new batteries, not used car batteries. For another, the battery storage is not concentrated, so much lower risk of fires spreading from battery to battery (which you've ignored).
For a third, if a battery fails, it's most likely going to be the house whose battery has failed that loses power if the grid was at its limit, it won't be a whole neighborhood, nor some industrial plant.
Finally, I would be quite surprised if there is any significant power grid where any industrial consumer would be at a risk of losing power even if all community batteries were to be unplugged from the network (ignoring the effects of a sudden surge, like in the oven example, of course).
Sure, those are rich people too. In fact, so are the handful of Oil tycoons down in Texas. Since we're in super-serious mode, I don't "worry" about rich people. I tolerate their privilege just like everyone else.
When rich EV owners were given the entire first level of my companies parking garage and I had to park my cheap hybrid on the roof because it didn't have a Tesla charger I was a bit annoyed but I tolerated the fact that they were getting free energy (fuel) and a clean car while my car collected pollen.
When rich EV owners were given preferential access to highways despite having better fuel efficiency than ICE cars I was a bit annoyed but I tolerated the fact that they get to work faster and cheaper while sitting in a nicer car than mine.
When rich EV owners were given subsidies on their cars with no salary cap I tolerated the fact that my $20k hybrid had no subsidies and that I paid every cent on my own despite the car not being as fancy.
So yeah, forgive me that I take a mildly humorous approach to giving any more free stuff to EV owners when it almost exclusively benefits the rich.
For the record, I'd love to be an EV owner - I own a hybrid afterall. I can't though, market forces keep rent really high and I can't buy a house when the sale price of the house is actually $100-$300k above the listing price. If I can't afford a simple house to charge a car at, then I certainly won't look at a $60k+ car as an investment.
Edit:
Just to address your "total cost of ownership of a Toyota Camry" line: https://www.caranddriver.com/features/g36278968/best-selling...
These were the top sellers of 2021. Not a single car in the $20k range. Many cars that are affordable to the every day person have limited mileage or are slow, and with rent and home prices climbing it makes it difficult for the people who could fit into those cars financially to do so when they're being pushed farther and farther out of the city.
Will any state be willing to rely on used car batteries as a critical component of their power grid?
What I think is more feasible is us finding a way to store energy outside the means of a typical lithium battery. I could very well be idealistic in this sense though.
It's also not something that you can just try out. I'm sure it will "work" in some sense at small scales - you can probably buy a few worn batteries off a used car and connect them to the grid and perhaps make a profit.
But the problem is that this can't be relied on by a whole country as a solution to ensuring power generation. This type of storage is by definition "best-effort" : you don't know at what rate you'll be able to increase storage capacity (how many car batteries will be retired and with how much remaining capacity?), you don't know how much capacity you actually have (what is the actual remaining capacity of these batteries, and what is the risk each will malfunction in some way in the next charge/discharge cycle?).
Not to mention, the risk of fires while amassing worn-out lithium batteries in close proximity to each other is gigantic, and there is no simple way of putting out a lithium battery fire. It could even be that this alone is enough to make such an operation unprofitable when accounting for insurance costs, even if it were allowed to run and connect to the grid.
I'm not going to spend days or weeks researching and coming up with a decent statistical model for something I don't even believe makes sense on intre the face of it for a comment thread.
I'd also note that something being infeasible from first principles explicitly implies that there's no need for calculations or experiments. For example, if someone comes up with a machine whose claimed performance makes it a perpetuum mobile, I don't need to calculate anything: I know from first principles (conservation of energy) that they are wrong or lying. Of course, this is nowhere near as cut and dry, but I did give my reasoning for why this doesn't seem to me to make any sense.
Solar power is not cheaper than combined-cycle natural gas at midnight. The article that you cited does not contain the words "battery" or "storage", and one really needs to compare the all-in levelized cost of energy (and storage) over the life of the project. It does mention hydrogen, but does not go into the efficiency calculations.