Solar photovoltaic systems are placed on the roof, while a high-efficient electrical heat pump and natural cooling system create a comfortable atmosphere inside.

屋顶安装了太阳能光电系统，为内部构建了一个高效的电热和自然冷却系统，营造出内部舒适的居住环境。

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This also eliminates the significant cost-typically at least doubling the price of a given module-of adding solar photovoltaic systems to already existing buildings.

这也避免了大量的成本通常至少一倍的价格，给予模块添加太阳能光伏发电系统，以现有的建筑物。

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Unlike traditional solar modules made of silicon, the concentrating photovoltaic systems provide energy only if they are precisely aligned to the sun.

不同于传统的硅基太阳能电池组件，聚光光伏系统只能在精确追踪太阳光线的前提下才能提供电能。

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Recently, Texas businesses signed six agreements worth half a billion dollars in exports to China, including cotton, crystalline silicon solar cells and photovoltaic generation systems.

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Last week GT Solar ( SOLR), a global provider of polysilicon production technology, crystalline ingot growth systems and related photovoltaic manufacturing services for the solar industry, announced that it had acquired privately-held Crystal Systems.

FORBES: Solar ETFs Rebound

If, on the one hand, you've got biofuels which represent only a half a percent conversion of sunlight, and let's say you've got photovoltaic cells and concentrated solar power systems, the efficiency of solar in terms of pure conversion is 50-100 times greater.

CNN: Biofuels: What do the experts think?