For example, it recently won an order to provide a 2.2 megawatt-hour battery, the size of a shipping container, for use in tests to back up a Chinese coal-fired power station.

例如，它最近获得了一个订单，为中国的一个火力发电厂提供一个2.2兆瓦时，集装箱大小的电池，进行备份测试。

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Prices have fallen from around $60 per megawatt-hour last summer to $20-30 this summer. They are strongly tied to the prices of natural gas and coal, which have both fallen too.

电价从去年夏季每兆瓦约60美元下跌至今夏的20—30美元，紧随天然气和煤的跌价而下跌。

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The cheapest solar power now costs $120-140 per megawatt hour.

目前最便宜的太阳能每兆瓦时需要120-140美元。

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Facilities that achieve 60 percent efficiency will be eligible for a full REC per megawatt-hour.

FORBES: Massachusetts Addresses "Biomass Loophole" and Limits Subsidies

Ted Wiley, an Aquion vice president, tells me the company is currently deploying in the kilowatt-hour scale, but will have megawatt-hour systems online next year.

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In fact, government and power plant data show that burning woody biomass releases 1.5 times as much carbon dioxide per megawatt-hour generated as coal, according to the Massachusetts Environmental Energy Alliance.

FORBES: Massachusetts Addresses "Biomass Loophole" and Limits Subsidies