Vestas will deliver 29 V126 3.45MW turbines to the 100MW Apple Blossom project in Huron County, east Michigan.
Sempra acquired the site from local developer Geronimo Energy in July for an undisclosed fee.
Apple Blossom is due online by the end of 2017 and has a 15-year power purchase contract with state utility Consumers Energy. Vestas will produce nacelles, blades and towers from its Colorado facilities, it said.
The project will boost Sempra's wind portfolio to more than 1.3GW, according to the developer.
This is Vestas' third reported turbine supply contract in the US during August. It was previously awarded a 160MW deal from EDF Renewable Energy and a 278MW contract from E.on.
In its Q2 results, released last week (18 August), confirmed orders in the US amounted to 481MW, the manufacturer said.
Vestas senior vice president Anders Rendtorff said the US had been a "prominent market" for the manufacturer for a few years. It is now benefitting from more stability following the five-year extension of the production tax credit support system at the end of 2015, he added.