13 Jun '12, 2pm

Hybrid Wind and Solar Powered Streetlamps Can Run Off-Grid

Hybrid Wind and Solar Powered Streetlamps Can Run Off-Grid

University of Seville OTRI/Promo image Streetlights are an important safety measure in towns and cities, but they since they burn all night long, they often make up a large chunk of a city's power demand. Solar-powered streetlamps seem like a wonderful solution -- solar panels on the lamp posts harness solar energy during the day that is stored and used to power the lamps at night. But cloudy days keep the lamps from being able to operate on renewable energy alone. That's where University of Seville's wind- and solar-powered Holonic Streetlamp comes in. The design features both two top-mounted solar panels and a vertical-axis wind turbine to provide power for the lamp, letting it run on renewable energy alone and both on and off the grid. The power generated is stored in two 12-volt lead gel batteries contained in the base of the lamp post, though lithium-ion batteries cou...

Full article: http://www.treehugger.com/clean-technology/wind-and-solar...

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