ET is looking to raise $250m in a US flotation sometime by early next year, according to press reports, in another sign of capital markets' growing appreciation of solar assets.

The so-called YieldCo model has taken off in North America over the past year or so, with companies ranging from major utilities (NRG) to wind developers (Pattern Energy Group) to solar developers (SunEdison) having floated YieldCos on the public markets or announced plans to do so.

YieldCos