Labor energy spokesman Dean Winter pointed out a video on former Premier Will Hodgman's Facebook page, where Mr Barnett promised to "de-link" from the national market to force down power prices for Tasmanians by 7-10 per cent.

Mr Barnett also said in the video the government would cap power price increases at CPI between 2018 and 2021. Regulated power prices decreased in Tasmania by 1.38 per cent in the 2021, and 7.11 per cent in the 2022 financial years.

But Mr Barnett rejected Mr Winter's accusation that he mislead the public.

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"Our 2018 policy was very clearly not about physically disconnecting from the National Energy Market - which was confirmed when we announced the policy," he said.

Cutting the state off from the national market was not in Tasmania's best interests, whereas interconnections like Basslink and the Marinus Project would allow the state to sometimes import cheap power from Victoria, he said.

"Being part of the NEM puts downward pressure on power prices while also providing a financial return to Tasmanians, allowing us to reinvest in health, education and other essential services."

Electricity prices for regulated households rose about 12 per cent last year, and could rise by a similar amount this year.

Labor claimed that the state's continued participation in the National Energy Market is costing Tasmanian households an average of $500 per year.

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"Tasmanians should be paying Tasmanian prices for Tasmanian power," Mr Winter said.

Labor also claimed the government had backflipped on a pledge to provide half of $33 million in federal funding relief to Tasmanians this year.

"If that is the case, why did he [Treasurer Michael Ferguson] include $16.5 million of false hope to Tasmanian families in his budget update?," Mr Winter said.

Mr Barnett confirmed that the federal relief money would "provide significant bill relief" for Tasmanians from July 1.

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