Google is testing a fleet of plug-in hybrids and software that would turn them into load-balancing tools for utilities flooded with variable power from wind and solar generators.

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To boost its green credentials, the designers have incorporated 160 square meters of solar panels on the roof, as well as wind generators that can produce 28-30 kilowatt hours of power (kwh) -- the average daily consumption of a family household.

CNN: The $6 million man-made floating island