Re:Nuclear power is the best climate-change solution
by cinntaile on Saturday November 06, 2021 @11:42AM
(#29131141)
These numbers are way off though, maybe those are just the cells?
If we look at the 2021 estimates by the National Renewable Energy Labs for utility scale 4h batteries [0] We get cost estimates of 250 $/kWh for the high case, 200 $/kWh for the middle case and 150 $/kWh for the low case by 2030.
[0] https://www.nrel.gov/docs/fy21osti/79236.pdf.
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Re:Nuclear power is the best climate-change solution
by pydry on Saturday November 06, 2021 @11:54AM
(#29131255)
That seems to be the cost of the physical batteries, not the price the grid would pay the farm for.
Re:Nuclear power is the best climate-change solution
by cinntaile on Saturday November 06, 2021 @12:33PM
(#29131617)
That makes sense I guess.
Assume enough energy is supplied to charge the batteries. So lets say we want 1kWh during 4 hours, that puts our capital cost at 4 kWh*200$/kWh = 800$. Now we assume this system runs every day for 4 hours during ten years. Ten years sounds reasonable, but it could be less. 7 years maybe? So about 1kWh*365,25*10=14610kWh in total. That gives us 800$/14610kWh = 0,0548$/kWh or 54,8 $/MWh in 2030 if I didn't make a major mistake somewhere and assuming no efficiency losses. That's pretty good.