The company's strategy manager Michael Connarty made the pitch recently to the Premier's Economic and Social Recovery Advisory Council.

"Fast-tracking Marinus will provide certainty for renewable energy investors such as us, and unleash a wave of on-ground construction in Tasmania, currently estimated at over $6.3 billion and more 15,500 job years for our state," he said in a submission to the council.

He said UPC was progressing two renewable energy projects in the North-West which represented $1.5 billion in investment and 400 construction jobs at its peak.

But Dr Connarty said the second stage of these projects was dependent upon the Marinus Link.

He said uncertainty around the project's start date had created uncertainty in the renewable energy community which could drive investment and jobs to other states.

Energy Minister Guy Barnett said development within the renewable energy sector in Tasmania was important for job creation.

"The PESRAC report identified renewable energy as a key part of our future as we move through the coronavirus panademic," he said.

"We're doing everything we can to progress Marinus Link as swiftly as possible with support from the Australian Government."

Labor's energy spokesman David O'Byrne said delivery of the project was a long way off.

"For the Premier and the Energy Minister to come out and say that this is part of the COVID economic recovery when the project at the earliest won't be delivered until 2029 is laughable," he said.

"The government has to answer the question of who pays for the Marinus Link.

"Until they do, the project and the promised benefits of unlocking jobs and renewable energy investment are a fantasy."

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