The Danish manufacturer will supply 75 V110-2MW turbines to the 150MW Slate Creek project in Kansas, and 150 V100-2MW turbines to the 300MW Roosevelt development in New Mexico.
The orders are included under the master supply agreement that was signed between Vestas and the US-based developer in September 2013.
Under the agreement, Vestas has now supplied 944MW to EDF in the US.
Both projects have long-term power purchase agreements and are expected to be brought online by the end of 2015.
The two companies also have a supply deal for Europe, where EDF agreed to order 30% of its turbines from Vestas until the end of 2014.
The V110-2MW turbine is currently being tested in Denmark, where Vestas installed a second prototype at the start of May. The turbine already has several firm orders to be used at US projects.
Vestas also received a 124MW order from RES Americas to supply 62 V100-2MW turbines to the Border Winds project in North Dakota. Commissioning is expected by the end of 2015.