Ben Preiss
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Solient Energy’s Heliotube Panel could make solar power more affordable by using less photovoltaic material, which is expensive. Mirrors track the sun across the sky and focus its energy on the smaller area of photovoltaic material. This solar panel should cost about half of what current solar panels cost and produce electricity at a cheaper cost than the electrical grid in most markets. The Heliotube is to start shipping later this year.  Concentrating sunlight with mirrors or lenses on a small area cuts the costs of solar power in part by reducing the amount of expensive photovoltaic material needed. But while concentrated solar photovoltaic systems are attractive for large-scale, ground-based solar farms for utilities, conventional designs are difficult to mount on rooftops, where most residential and commercial customers have space for solar panels. The systems are typically large and heavy, and they're mounted on posts so that they can move to track the sun, which makes them more vulnerable to gusts of wind than ordinary flat solar panels are.
Soliant has designed a solar concentrator that tracks the sun throughout the day but is lighter and not pole-mounted. The system fits in a rectangular frame and is mounted to the roof with the same hardware that's used for conventional flat solar panels. Yet the devices will likely cost half as much as a conventional solar panel, says Hines. A second-generation design, which concentrates light more and uses better photovoltaics, could cost a quarter as much. He says that a more advanced design should be ready by 2010.
(technologyreview)References: soliant-energy, technologyreview Filed In: |
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