RenewableUK chief executive Maria McCaffery said the announcement showed clear evidence that the Treasury and the Department for Energy and Climate Change are in step and provides industry with the assurance it has been asking for.
"This blows the last few months of political infighting completely out of the water," she said.
The industry had been alarmed by a series of anti-wind comments from new junior minister for energy John Hayes.
However, the government has decided not to include a decarbonisation target for 2030 in the bill. It will consider this again in 2016, after the next election.
More details of support for renewables will be laid out in legislation to be published next week. The Energy Bill will outline major reform of the electricity market to boost low carbon generation, including a new support mechanism for renewables.