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I've heard lots of people mention that concerns about the sustainability of electric vehicles are mitigated when you consider that at end-of-life the batteries can be reused as stationary, grid connected energy storage systems. To what extent is this happening in practice?

I'm not interested in small pilot projects or research studies.

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Recycling batteries sounds very noble. But fruitless. Because recycling batteries to make "Grid storage" for communities......That's a lot of batteries. New York City uses 11,000 Megawatt hours of electricity a day! You'd have to gather 110,000 tesla batteries to store a days worth of electric use. Batteries are a horrible way to provide energy, they cost 10-20 dollars a pound, hydrocarbon storage (a steel drum) costs $0.75 Even if you recycle the car batteries, they're probably not gonna find their way into cars again; even if they were they'll have to be reprocessed, in essence Re-manufactured to meet speculative demand for new cars. It takes the energy of 100 barrels of oil, to make just one battery from scratch, recycled contents or otherwise will save about half that. Worse, what's the quality of the battery that it can be re-adopted for other duties. So far Tesla has produced it's millionth car in april 2020. But the demand for ev batteries will outpace ALL recycling efforts. And the demand to replace our gas powered fleet with ev's will require a 1000 fold increase in those batteries and given their shelf life, they may not be available to donate for other uses. An EV future is an environmental nightmare.

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    This question is in regard to reusing existing batteries for grid storage, not recycling (breaking them down to base components to make new batteries). You say "You'd have to gather 110,000 tesla batteries to store a days worth of electric use." - yeah, but those batteries can be recharged from the grid and would generally only be needed for 12-ish night-time hours. Plus, the transport cost of batteries is a once-per-5-10 year deal, compared to trucking hydrocarbons around daily.
    – Robotnik
    Oct 20 '20 at 0:38
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    "Even if you recycle the car batteries, they're gonna find their way into cars again to meet speculative demand." - I'm not sure what you mean - even if old batteries WERE reused in cheaper/low-range EVs - isn't that a win? "Worse, what's the quality of the battery that it can be re-adopted for other duties." - most examples talk of batteries that have hit 50% degredation, but their usefulness for grid storage would still be good, as the output demand would be a 'trickle out' rather than the 'bursts' of power that an EV would demand.
    – Robotnik
    Oct 20 '20 at 0:42

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