Solar energy storage breakthrough could make European households self-sufficient

ooli@lemmy.world to Technology@lemmy.world – 389 points –
Solar energy storage breakthrough could make European households self-sufficient
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According to their site:

A storage system of 3 m3 can store up to 10,000 kWh of energy

So about 3.33 MWh per cubic meter, 3.33 kWh per liter, or 3.33 Wh per cubic centimeter.

Hmm, if that's correct, that's even higher than liquid hydrogen, which would be really impressive.

Energy densities

Edit: Looks like their gravimetric energy density is 3.5kWh/kg

Edit 2: here's a comparison for batteries

Battery Cell Energy Density

Since it's solid hydrogen I think it's to be expected, however I didn't see any information regarding energy losses which I imagine would be quite high when you have those kinds of cooling requirements.

This is why I hate marketing pushes. If they're a good-faith business, the efficiency needs to be within shooting distance of reasonable against costs. But as we learned from the artificial meat industry (that ultimately admitted we've already probably reached lifetime price/quality/scale limits from the methodologies they're using) brutal honesty doesn't get you investors.

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Thats in the ballpark of a year of usage from a household. Neat if true.

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