23 Sep '13, 2pm

Reflectors Significantly Raise the Efficiency of Rooftop Solar

Reflectors Significantly Raise the Efficiency of Rooftop Solar

Flat-roofed urban buildings bake in the sun all day with no shade from trees, so they are the perfect place for solar panels. They can deliver power directly to where it’s needed without significant transmission loss. But roof space is limited so efficiency is very important. TenK Solar of Minneapolis has developed a system that achieves amazing efficiencies by putting plastic reflectors in the spaces between the solar panels. To make this work, they had to rethink the way solar cells are interconnected: Conventional solar systems connect panels with a series string — and just like the old Christmas lights, the whole string goes dark if a single light is bad. Series connected solar cells have the same problem and worse: A tree or cloud shadow, a fallen leaf, or blop of bird poop can reduce the output of the whole string. If the cells are not matched and equally illuminated...

Full article: http://www.renewableenergyworld.com/rea/blog/post/2013/09...

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