The carbon price has helped energy company Hydro Tasmania to the largest profit in its history.
Hydro has announced a pre-tax profit of $238 million for 2012/13, more than double last year's result.
The state-owned company says the carbon price contributed $70 million and the export of renewable energy across Bass Strait a similar amount.
A dividend of $116 million will be paid to the state government in 2013/14.
But chairman Dr David Crean said uncertainty over carbon pricing was among several factors that could create a less positive future.
"This was a year in which the true value of the state's 100-year investment in renewable energy was finally realised," Dr Crean said in a statement.The future of the largest wind farm in the southern hemisphere, proposed for King Island, could also be contingent on the new federal government's decisions on renewable energy.