The mid-2015 timeframe was disclosed Thursday by chief executive Ahmad Chatila on a conference call with analysts.

In launching TerraForm Power onto the Nasdaq Exchange this July, SunEdison became the first US-based pure-play solar developer to launch a yieldco. Some of its US rivals, including SunPower and First Solar, are considering following suit.

TerraForm Power owns solar assets in the US, Canada and the UK.

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