Pacific Gas and Electric (PG&E) has signed a 25-year power purchase agreement (PPA) with enXco, an EDF Energies Nouvelles company, for a 100MW wind farm to be built in California, US.

The Shiloh IV wind energy project in Solano County represents a repowering effort to upgrade older technology, and the project development includes removal of 235 existing Kenetech 100kW turbines.

The original project was installed in 1989, with a power generating capacity of 25.2MW.

The new project will be developed, built, and owned by enXco, and is expected to begin commercial operation by the end of 2012.

enXco will also operate and maintain the Shiloh IV project, which is subject to approval of the California Public Utilities Commission.

enXco president and CEO Tristan Grimbert said that with the Shiloh IV project, the company will have developed five wind energy projects in the Montezuma Hills wind resource area for a total capacity of 505MW.