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249 points Jtsummers | 3 comments | | HN request time: 0.001s | source
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umvi ◴[] No.45762286[source]
Has storage been solved yet? In my experience US power companies hate crediting pushback to the grid because it all happens at the same time during peak sunlight hours and then customers get to use those credits at night and during the winter which the power company thinks is unfair. In Idaho at least the power companies were able to change the laws so that you get much fewer credits for solar panels on your roof which means they aren't great unless you can figure out how to store the generated energy inexpensively.

Personally I like the idea of an electric car doubling as a house battery but so far I think only the F-150 lightning is capable of doing that.

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Retric ◴[] No.45762392[source]
> Has storage been solved yet?

In general yes, grid solar + grid batteries are cheaper than any peaking power plants. So now 24/7 batteries + wind + solar generally outcompetes nuclear, coal, or natural gas on price as long as there’s no tariffs involved.

This isn’t enough to make batteries + solar viable in Alaska but long distance transmission lines could solve that issue cost effectively.

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seanmcdirmid ◴[] No.45762478[source]
Solar is actually viable in places like Alaska and Finland. It just isn't viable in the winter, but in the summer it is extra viable. Greenhouses (another form of solar) also work wonders in Alaska, and outside they can grow the biggest pumpkins you'll ever see anywhere.
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AnimalMuppet ◴[] No.45762550[source]
OK, but nobody has enough batteries to store enough for the winter. Overnight? Sure. Winter? That's a whole different deal.
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cachius ◴[] No.45762677[source]
That's why you generate hydrogen during summer for gas power plants during winter.
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downrightmike ◴[] No.45763281{3}[source]
Hydrogen containment isn't long term, every atom we use to make hydrogen tanks are much larger than hydrogen, so they leak no matter what.
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1. pfdietz ◴[] No.45764004{4}[source]
It would be stored underground at scale, not in tanks.
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2. downrightmike ◴[] No.45766423[source]
And tell me again what the ground is made of
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3. pfdietz ◴[] No.45771105[source]
Ideally, salt. Deeply underground, solution mined to make large cavities. This is a preferred method for storing natural gas. Failing that, deep aquifers (not potable ones; saline water is fine).

If the basement rock is close to the surface and is crystalline, it probably involves deep mining to form cavities, which would raise the capex by maybe an order of magnitude. Other options could become cheaper then, say storing ammonia.

This is for large scale storage, of course, not for individual residences.