On each massive unit, 100 lenses will concentrate sunlight 700 times onto tiny cells just seven square millimeters across.

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It said standard cells were about 20 square meters, each with a toilet and a bed.

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The GT uses solar cells on its roof as well as an additional three square meters of detachable solar panels, says a SolarWorld spokesperson.

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It consists of a 560-pound (254 kg) square lithium-ion battery pack with a volume of 133 liters, comprising 336 prismatic cells.

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