MHI-Vestas could supply 50 V112-3.3MW turbines to the project off the coast of Belgium, if the deal is made firm. Belwind 2 - also known as Nobelwind - is located next to the 165MW Belwind 1 project.
A statement from Vestas said: "As soon as the project translates into a firm and unconditional order, Vestas will disclose a company announcement about this."
As a joint owner of MHI-Vestas, Vestas is required under Danish law to reveal details about the deal if any information on it reaches the market.
Belwind 2 is being developed by a consortium made up of the Sumitomo Corporation and Parkwind NV.
Sumitomo purchased shares in Belwind 1, 2 and Parkwind's 216MW Northwind site in 2013. If the Belwind 2 deal goes through, it means all three developments will have used Vestas turbines.
Belwind 2 is currently being used as a test site. French manufacturer Alstom has installed a prototype of its 6MW Haliade 150 turbine at Belwind 2, located 45 kilometres off the Belgian coast.