The seven-year contract, which is the biggest ever services deal Vestas has been awarded, covers Spain, France, Romania, Italy and Portugal, as well as the US.
It covers over 1,100 turbines, with over 70% located in the US. It takes Vestas' overall servicing capacity to 37.5GW.
Speaking about the deal, Vestas CEO Ditlev Engel said: "This service agreement is a demonstration of our customer focus, service orientation and versatility in different wind markets and site conditions.
"It also proves that Vestas continuously delivers the highest business case certainty and return on investment through its enhanced service solutions and highly qualified global service team."