Casas em Movimento from Portugal have designed several solar-powered homes that move to track the motion of the sun during the day.
This drastically increases the amount of energy they can absorb. The design was inspired by sunflowers. The combined rotation of the building and roof produces 25,000 kWh/year of electricity, five times as much energy as a home of comparable size would typically use. The home uses the equivalent of six 60 watt light bulbs running for one hour to rotate each day.
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