Either they invest millions of dollars in new production facilities in Brazil, or they must leave one of the world’s fastest-growing wind markets knowing that they may never be able to return.

It is a huge risk either way.

Staying in Brazil will require an investment of about R$100m ($46m), according to industry sources. Yet the market is so competitive that current profit margins are almost non-existent, and there is no guarantee — even for the major players — that they will ever see a return on this investment.