The joint industry OWA project supports research and collaboration in the offshore wind industry to help lower the costs of offshore wind.
Nine developers including Dong Energy, E.on, EnBW, RWE, ScottishPower Renewables, SSE, Statkraft, Statoil and Vattenfall are all involved in the initiative to research, develop and demonstrate new technology.
The money will be used to help further support the development of floating wind projects in Scotland and encourage greater collaboration and investment from the industry, the Carbon Trust said.
Scotland's donation follows the £2.2 million it awarded to the programme in July 2014, also to help floating wind initiatives.
Scotland is set to be home to the world's first commercial floating offshore wind project with Statoil's 30MW Hywind Scotland site, which reached a final investment decision in November.
New Scottish energy minister Paul Wheelhouse said: "Previous Scottish government support for the OWA has helped develop new ideas in key areas of importance to companies operating in Scottish waters and I have no doubt this new funding will help firms to continue this important work.
"I will be attending Renewable UK's Global Offshore Wind Conference on Wednesday in Manchester where I look forward to discussing not only this important announcement but the Scottish Government's continued support for this important part of the renewables sector," Wheelhouse added.
Since it was set up in 2008, the OWA has also supported the development of floating lidar technologies, 66kW cables, lightweight monopiles and suction-bucket foundations for projects in the UK and Europe.