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oh no! think of the stock market!
(lemmy.world)
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this post was submitted on 02 Oct 2024
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of course it's a furry shitposting about it.
They aren't wrong though, storage technology is only starting to come to market in significant enough capacity to be beneficial.
And for storage plants to be financially viable energy costs during the day need to be really cheap, so they can raise them at night and make a significant enough profit to break even.
2 giant lakes. 1 uphill from the other, or one underground. When there's excess energy you pump water uphill. When you need more you let it back down
How efficient is making hydrogen? If you don't need a huge facility, it might be easier to just store it that way, so you don't need giant lakes everywhere.
Less efficient than pumped hydro. Appears to be about 40% for green hydrogen in the round trip vs 80% for pumped hydro with a quick google search.
I am curious what's involved in the "round trip"? Do you mean to fuel other machines directly with hydrogen?
directly storing electricity as a chemical battery system is likely going to be more efficient (way more optimized and generally a lot simpler) and something like thermal energy storage (really, really simple, and very, very effective, plus pretty cheap, there just isn't much accessible tech out there at the moment, though it suffers from the same conversion problem, it's certainly a lot simpler than hydrogen.)
Energy to hydrogen back to energy, so electrolysis to a hydrogen fuel cell. I think burning hydrogen directly is even less efficient.