Ontario-based Wind Works Power said the order for up to 60 of Nordex’s 2.5MW machines keeps Thunder Spirit within the eligibility criteria for the federal Production Tax Credit (PTC) incentive.

The two-stage Thunder Spirit has signed a power purchase agreement with Montana Dakota Utilities for the output from a 105MW first phase.

Nordex will deliver the turbines from June 2015, with project completion due by the end of that year, the developer said.