There has been speculation that Conservative chancellor of the exchequer George Osborne is looking to cut onshore subsidies in response to pressure from his party. However, the bigger fear is that cuts to offshore subsidies could hamper the prospect of turbine manufacturers building plant in the country.
Speaking in an interview with the Financial Times, Davey said: "If we send signals to investors and to companies that we’ll play fast and loose, and we won’t go where the evidence is, we won’t stick to our word, what will happen? The cost of capital for investment in the UK will go up so there will be a political risk premium."
He added: "We absolutely have to be green in this government, and being green means being straight with investors and companies and not messing them around."
Speaking at last week's Global Offshore Conference in London, Vestas, Areva and Alstom all said developer confidence was essential if the UK was to go ahead with its ambitious offshore wind programme.
There have been accusations that the Conservatives are anti-onshore. According to Windpower Intelligence, only three onshore wind farms with a combined capacity of 64MW have come online this year.
Last year, 521MW of onshore wind farms came online in the UK. While in 2010, the year the coalition came to power, 639MW was installed.