The scheme on the Rioni river is to be developed by Turkish firm Nuroli and South Korean companies Korea Electric Power Corp (Kepco) and SK Engineering and Construction (Skec).
The cascade will comprises the Tvishi (100MW), Namakhvani (250MW) and Zhoneti (100MW) plants. Together they are to generate 1650GWh of electricity per year.
Construction of the plants is expected to take approximately four-to-five years.
The Ministry noted that a new DC transmission line between Georgia and Turkey will help exports to meet peak load demands, and in future be part of the network link to south east Europe.
Other major projects in development are the Khudoni plant and the Oni cascade.
It added that, under the Renewable Energy 2008 programme, there were 80 potential project sites identified for possible development, each having up to 100MW capacity.