风力发电追求度电成本，叶片在风机的造价中占20%的成本份额。
Wind power generation pursues Cost per kilowatt hour of the electricity generated by WTGS.
太阳能输出电能的每度电成本是通过估算太阳能板在其20到25年的保修期间总输出电能来计算的。
The cost per kilowatt hour of solar power is figured by estimating the total power output of the solar panel over its 20 - to 25-year warranty.
例如，今年四月，美国罗德岛州公共事业委员会否决了一项海风发电项目交易，该项目每度电成本为24.4美分。
In April, for example, the state public utilities commission in Rhode Island rejected a power-purchase deal for an offshore wind project that would have cost 24.4 cents a kilowatt-hour.
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