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by simiones
1615 days ago
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> That's not really the problem with solar. Storing energy in batteries from day to night is a solved problem, it doesn't even double the price of electricity. I very much doubt this is "solved" at the scale of an entire country's energy needs for half a day, never mind the entire world's. Lithium and other materials for batteries are not that abundant, and definitely not that abundantly extracted. |
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Tesla sells Megapacks with a capacity as high as 3 GWh (but I'm sure if you're the richest person in India, they'll be more than happy to customize bigger solutions for you) [1].
You can head to their website and order right now over the internet a 15 MHh pack for $6.4 MM; the annual maintenance is listed as $21k. These things are supposed to last for 10 years, have a 90% round trip efficiency, and have a capacity of 70% left at year 10. So you can charge and then discharge (and sell) about 50 GWh over these 10 years, for a total investment of less than $7 MM. That is $0.14 per kWh. If you buy 1000 such packs, you get a 30% discount [1], so you end up with a breakeven cost of $0.10 per kWh.
As I said, Tesla offers now up to 3 GWh Megapacks. Would they be able to manufacture 100 such Megapacks over a 5y period? It does not sound that crazy.
[1] https://www.thestreet.com/tesla/news/new-tesla-megapack-deta...
[2] https://www.tesla.com/megapack/design