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Re:How Cheap Can Solar Get? by crdoconnor on Wednesday August 12, 2015 @06:30AM (#10047026)
>IIRC all the efficient solar cells we currently have contains some rare materials.

Yeah, but the super-efficient solar cells are not the cheap ones that everybody is putting on their roof. They're the ones going on the international space station.

>Once a particular solar technology reaches grid parity

It already did in about half of the continental US, about two years ago.

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