It could take more than a year to repair a Queensland coal-fired power plant which supplies 16 per cent of the state's electricity.
The Callide C power station catastrophically failed after an explosion in its turbine hall on May 25.
The resulting outage hit more than 470,000 homes and businesses between the NSW border and Cape York.
State-owned generator CS Energy, which runs and maintains the plant in a joint venture with InterGen, has forecast the damaged C4 turbine to return to operation by June 2022.
But that timeline is in doubt with no funding in the 2021/22 Queensland state budget to repair the damaged turbine.
There is $10.1 million for capital works at the Callide C in 2021/22, but that was locked in before the accident.
CS Energy says it's working with InterGen and their insurers to work out how to replace the C4 unit, with the date of its return to be "updated".
"The current forecast return to service date for Unit C4 is in 12 months' time," a CS Energy spokesperson told AAP.
"This return to service date is based on the information that the Callide C JV has available at this point in time and will be updated when we learn more."
Opposition energy spokesman Pat Weir says the insurance claim will likely set back the repair deadline because it's complicated by CS Energy and InterGen having different insurers.
"I understand there's already been a few hiccups," he told AAP.
Mr Weir also questioned the amount of capital works funding allocated to the Callide B plant, which is slated to close in 2028.
The generator will receive about $43.5 million for refurbishments and overhauls in 2021/22, compared to the $10.1 million allocated for the newer Callide C before the accident.
"Callide B is the one marked for the early closure, but it's still got down here $43 million in the budget papers, so there's a number of questions around Callide," Mr Weir said.
The budget papers said it was too early to know the long-term impact of C4's outage on CS Energy's dividends.
"The recent incident at Callide Power Station is expected to reduce returns to government from CS Energy in 2020-21, although it is too early to ascertain any longer-term implications," the budget said.
The Greens have proposed decommissioning the entire plant and using the $200 million in estimated repair funding for a battery and to retrain the 260 workers.
Greens MP Michael Berkman said the state government was talking big on renewable energy in the budget, but needed to back it up with funding and action.
"We need to see a genuine transition plan for workers depending on those industries, otherwise Queensland's economic prospects and achieving our climate targets is jeopardised," he said.
"If they go ahead and spend hundreds of millions of dollars on a blown-up, coal-fired power station, then they lose any credibility they might have gained today."
Australian Associated Press