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I do not understand the point "EVs are extremely useful for daily grid management." and the image https://innovationorigins.com/wp-content/uploads/2019/04/Sche

I do not understand the point "EVs are extremely useful for daily grid management." and the image https://innovationorigins.com/wp-content/uploads/2019/04/Schermafbeelding-2019-04-30-om-22.51.12.jpg https://innovationorigins.com/wp-content/uploads/2019/04/Sch... I am imagining most cars will be plugged in at night when there is no solar energy produced,do they imply you can buffer energy in the cars battery and you can extract some if is needed or that you can charge it in smart ways, like charge slower if the grid is not at full capacity. Are there disadvantages for the battery life or charging time?

legooolas 8y ago
Disadvantage to the end user of the car: Cycling the batteries more to do this will shorten their useful life.
- sliken 8y ago
  Yes, this is true. It's not a huge factor. Keep in mind that the worst 1% of the days of the year are a serious strain on the electrical grid. They often require very inefficient and expensive peak plants to spin up to help ensure the grid doesn't fail. Not only are those peaker plants inefficient when running, they are quite expensive even when not running. Additionally even on those top 1% days (3.5 days a year) there's likely only a few hours where the load is near max. So if say 1M (2% or so of all cars) cars in a country like Germany would contribute say 25% of their capacity just 3-4 days a year it could make a significant difference and make the power grid more reliable and allow the least efficient peaker plants to be decommissioned. Even over a decade of use, electric car owners aren't going to notice 25% of their battery being used 3-4 times a year.
  - legooolas 8y ago
    If it's those sort of numbers then that would be fine - in everything I've read about this (which isn't a great deal) it's been very unclear as to how often such pulling back of power would be used. :)
jypepin 8y ago
My memory is blurry as this I read that almost 10 years ago now, and it probably changed since then, but one vision was, assuming you have an electric car that has a capacity of 200 miles. You drive on average 20 miles to get to work, get into the parking lot, plug in your car. It doesn't need to be charged, because you'll be doing the same 20 miles at night. So instead of charging, the grid is able to "buy" electricity from your battery during stress times (say maybe during lunch hour or something). You end up having the grid having access to all electric car's battery when not needed.
- simion314 8y ago
  Won't that affect the battery lifetime? Or this new batteries can be smart about this? I am thinking that replacing an used battery will contribute negatively to the environment.
  - jypepin 8y ago
    no idea :) I think it's a vision, so it's assuming we get to a point where batteries are better than today's.
rini17 8y ago
EVs used for commuting will eventually be plugged in during the day at the workplaces (in cities where the grid usually has more capacity), not only overnight at homes. Large part of renewables is wind, which is available overnight, too. Most EV users will surely accept trading, say, 30% of maximal EV range which they don't need every day, for cheap electricity plan. As long as we stay in optimal operating envelope for batteries (no full charge/discharge with large currents, no temperature extremes), there is no downside for battery life.

legooolas 8y ago

Disadvantage to the end user of the car: Cycling the batteries more to do this will shorten their useful life.

sliken 8y ago
Yes, this is true. It's not a huge factor. Keep in mind that the worst 1% of the days of the year are a serious strain on the electrical grid. They often require very inefficient and expensive peak plants to spin up to help ensure the grid doesn't fail. Not only are those peaker plants inefficient when running, they are quite expensive even when not running. Additionally even on those top 1% days (3.5 days a year) there's likely only a few hours where the load is near max. So if say 1M (2% or so of all cars) cars in a country like Germany would contribute say 25% of their capacity just 3-4 days a year it could make a significant difference and make the power grid more reliable and allow the least efficient peaker plants to be decommissioned. Even over a decade of use, electric car owners aren't going to notice 25% of their battery being used 3-4 times a year.
- legooolas 8y ago
  If it's those sort of numbers then that would be fine - in everything I've read about this (which isn't a great deal) it's been very unclear as to how often such pulling back of power would be used. :)

jypepin 8y ago

My memory is blurry as this I read that almost 10 years ago now, and it probably changed since then, but one vision was, assuming you have an electric car that has a capacity of 200 miles. You drive on average 20 miles to get to work, get into the parking lot, plug in your car. It doesn't need to be charged, because you'll be doing the same 20 miles at night. So instead of charging, the grid is able to "buy" electricity from your battery during stress times (say maybe during lunch hour or something). You end up having the grid having access to all electric car's battery when not needed.

simion314 8y ago
Won't that affect the battery lifetime? Or this new batteries can be smart about this? I am thinking that replacing an used battery will contribute negatively to the environment.
- jypepin 8y ago
  no idea :) I think it's a vision, so it's assuming we get to a point where batteries are better than today's.

rini17 8y ago

EVs used for commuting will eventually be plugged in during the day at the workplaces (in cities where the grid usually has more capacity), not only overnight at homes. Large part of renewables is wind, which is available overnight, too. Most EV users will surely accept trading, say, 30% of maximal EV range which they don't need every day, for cheap electricity plan. As long as we stay in optimal operating envelope for batteries (no full charge/discharge with large currents, no temperature extremes), there is no downside for battery life.