According to the regional authorities, the sum will comprise a grant of €34 million and an advance of €51 million to be reimbursed when the turbine and floater achieves commercial success.
The project, approved in July, will feature four GE Haliade 6MW turbines on semi-submersible floating platforms designed by DCNS. It is estimated to cost €183.3 million.
However, Jerome Billerey, director general of Quadran, which was awarded another pilot project off Le Gruissan in the Mediterranean, said there are still too many uncertainties over how the scheme will work.
The government has still not announced the tariff it will receive for the sale of electricity produced.
There is also insufficient clarity over the split between the grant and advances, and how the proposed penalty mechanism will work if projects do not meet the deadline, Billerey said.
The government originally allocated a total budget of €150 million, though later said this would be increased, without specifying an amount.