The agreement may see the Spanish company supply up to 57 5MW turbines from its G128 and G132 models in 2015 and 2016 for Finnish wind sites. The G132 version is for medium wind speeds.
Gamesa will also provide the operations and maintenance for 10 years.
This is the second framework agreement Gamesa has signed with TuuliWatti in less than a year.
At the end of 2012 it agreed to supply 135MW, under which Gamesa has received orders for the supply of 18MW to the Simo wind farm in Lapland with its 4.5MW turbines.
It also signed a 54MW and 32MW deal with the 4.5MW for the Pori in Western Finland and Tornio in Lapland plants, respectively, which are both under construction for completion in 2013 and 2014.
In July Gamesa received orders for three 5MW turbines to Salo, southern Finland.
Ricardo Chocarro, Gamesa’s CEO for Europe and RoW said: "The 5MW platform, one of the most powerful in the onshore segment, evolves from the 4.5MW platform and caters to the most complex wind farm developments in terms of competitiveness and cost of energy.
"Its innovative modular design and technology ensure reliability while complying with the most stringent international grid-connection codes and environmental standards."
TuuliWatti is a joint venture between Finnish energy company St1 and retail cooperative S-Group.