Financial terms of the deal were not released.

Deepwater chief executive William Moore and Thomas Mousten, head of offshore, Americas, for Siemens were set to reveal more details of the alliance at the American Wind Energy Association's Offshore Windpower 2011 conference in Baltimore.

“The Siemens turbine is the future of offshore wind, and our partnership with Siemens is a huge advancement and advantage for the Block Island Wind Farm,” Moore says in a statement.

“Not