The company will start construction of the wind facility in Willacy County by December this year and expects to begin operations by the end of next year.
Upon completion of a supply agreement with a turbine maker, the company will decide the number of turbines to be installed at the facility.
The Los Vientos II wind farm will be the second phase of a 402MW-total project announced on 8 August 2011.
The first phase, the Los Vientos I wind farm, is also expected to online by the end of next year.
US-based CPS Energy has agreed to buy all of the output from the first phase of the project under the terms of a 25-year power purchase agreement.
Austin Energy has agreed to buy the electricity and renewable energy credits generated by the seconf phase of the wind farm under a 25-year agreement.
Duke Energy Renewables president Greg Wolf said the Los Vientos II project will help the company put an additional 770MW of wind power into operation in next year.
