5 ms·

Solar has had exponential growth for 40 years. https://pv-magazine-usa.com/wp-content/uploads/sites/2/2023/12/AIWFC2023.image_.2-600x384.png https://pv-magazin

by tjoff 3y ago

Solar has had exponential growth for 40 years. https://pv-magazine-usa.com/wp-content/uploads/sites/2/2023/12/AIWFC2023.image_.2-600x384.png https://pv-magazine-usa.com/wp-content/uploads/sites/2/2023/... ( https://pv-magazine-usa.com/2023/12/25/all-i-want-for-christmas-is-one-terawatt-of-solar-deployed-annually/ https://pv-magazine-usa.com/2023/12/25/all-i-want-for-christ... ) How do you compare storage to that? What storage btw? Because all we have kind of suck for the grid usecase. So there is of course a ton of research for better suited batteries. But we haven't even started production on those. Are you not underestimating the time to ramp up production? Exponential growth is not gonna save you short to mid term. Especially not compared to solar and wind which of course have huge storage implications.

Retric 3y ago
We already have enough battery manufacturing capacity to build hours worth of grid storage over the next 5 years and more is coming online at double digit growth rates. What’s missing is the demand for grid batteries which is still relatively low. Right now California only wastes ~5% of its solar output per year but most days don’t have a surplus. That’s not enough capacity for nighttime storage to be worth it, you need consistent daily oversupply before charging becomes “free”. However, because of the demand curve batteries are viable for peaking power. Which is why some farms are built with “4h” aka 50% of daily output worth of battery storage. Thus we are past the initial tipping point of occasional viability where sometimes it’s a good idea. The big one is at roughly 5c/kWh where natural gas is no longer economically viable and the grid isn’t dependent on fossil fuels. 5c/kWh * 3,000 full discharge cycles ~= 150$/kWh total instillation cost including labor etc. Increase or decrease based on specific battery technology and it’s lifespan.
- pfdietz 3y ago
  > We already have enough battery manufacturing capacity It's amusing going back to HN threads from a few years ago and see people arguing that batteries are ruled out because we don't have enough battery building capacity. I'm not sure what could lead a person to believe that new factories cannot be built.
ben_w 3y ago
> How do you compare storage to that? What storage btw? Li-Ion production rates have also been growing exponentially since at least 2010[0]. > Especially not compared to solar and wind which of course have huge storage implications. Not so: the absolute worst case for renewables is wasting some of their output when they produce more than needed and using the existing dispatchable power plants when they don't produce enough. This can be transitioned gradually or quickly as more storage comes online. [0] possibly even longer, but the infographics I've found are annoyingly limited to 2010-${production date} at best, so here's one ending in 2020: https://www.freeingenergy.com/facts/learning-lithium-ion-batteries-economies-price-decline-g202/ https://www.freeingenergy.com/facts/learning-lithium-ion-bat... And this figure for 2023 is nearly 3.5 times that figure for 2020: https://www.statista.com/statistics/1419540/global-lithium-ion-battery-capacity-by-country/ https://www.statista.com/statistics/1419540/global-lithium-i...
- tjoff 3y ago
  Assuming we want li-ion for grid storage. I feel we don't have a choice but hardly optimal. The worst case is an unbalanced grid that leads to blackouts and/or disruptions. Not that we waste energy.
  - ben_w 3y ago
    > The worst case is an unbalanced grid that leads to blackouts and/or disruptions. Not that we waste energy. As the old gas plants don't magically cease to exist after N years, while this is technically correct it's about as important as pointing out the non-zero risk of a supervolcano blocking out 80% of sunlight worldwide for a decade.
    - tjoff 3y ago
      Sigh, not with the expected increase in energy consumption. And other sources that we do intend to shut down. Also depends on where you live.
      - ben_w 3y ago

by tjoff 3y ago

Retric 3y ago

We already have enough battery manufacturing capacity to build hours worth of grid storage over the next 5 years and more is coming online at double digit growth rates. What’s missing is the demand for grid batteries which is still relatively low. Right now California only wastes ~5% of its solar output per year but most days don’t have a surplus. That’s not enough capacity for nighttime storage to be worth it, you need consistent daily oversupply before charging becomes “free”. However, because of the demand curve batteries are viable for peaking power. Which is why some farms are built with “4h” aka 50% of daily output worth of battery storage. Thus we are past the initial tipping point of occasional viability where sometimes it’s a good idea. The big one is at roughly 5c/kWh where natural gas is no longer economically viable and the grid isn’t dependent on fossil fuels. 5c/kWh * 3,000 full discharge cycles ~= 150$/kWh total instillation cost including labor etc. Increase or decrease based on specific battery technology and it’s lifespan.

pfdietz 3y ago
> We already have enough battery manufacturing capacity It's amusing going back to HN threads from a few years ago and see people arguing that batteries are ruled out because we don't have enough battery building capacity. I'm not sure what could lead a person to believe that new factories cannot be built.

ben_w 3y ago

> How do you compare storage to that? What storage btw? Li-Ion production rates have also been growing exponentially since at least 2010[0]. > Especially not compared to solar and wind which of course have huge storage implications. Not so: the absolute worst case for renewables is wasting some of their output when they produce more than needed and using the existing dispatchable power plants when they don't produce enough. This can be transitioned gradually or quickly as more storage comes online. [0] possibly even longer, but the infographics I've found are annoyingly limited to 2010-${production date} at best, so here's one ending in 2020: https://www.freeingenergy.com/facts/learning-lithium-ion-batteries-economies-price-decline-g202/ https://www.freeingenergy.com/facts/learning-lithium-ion-bat... And this figure for 2023 is nearly 3.5 times that figure for 2020: https://www.statista.com/statistics/1419540/global-lithium-ion-battery-capacity-by-country/ https://www.statista.com/statistics/1419540/global-lithium-i...

tjoff 3y ago
Assuming we want li-ion for grid storage. I feel we don't have a choice but hardly optimal. The worst case is an unbalanced grid that leads to blackouts and/or disruptions. Not that we waste energy.
- ben_w 3y ago
  > The worst case is an unbalanced grid that leads to blackouts and/or disruptions. Not that we waste energy. As the old gas plants don't magically cease to exist after N years, while this is technically correct it's about as important as pointing out the non-zero risk of a supervolcano blocking out 80% of sunlight worldwide for a decade.
  - tjoff 3y ago
    Sigh, not with the expected increase in energy consumption. And other sources that we do intend to shut down. Also depends on where you live.
    - ben_w 3y ago