"(O)ur view is we will replace that plant with what we are calling a synthetic generating plant which is as reliable, is more efficient, which is less polluting and actually less costly than that alternative," Mr Vesey told the BOSS Leadership Summit on Wednesday.
Feeling the heat from rising electricity prices, Mr Turnbull summonsed Mr Vesey to Canberra and turned up the heat on AGL to extend Liddell's life by five years from its announced 2022 closure two months ago, arguing it was needed to keep electricity reliable and affordable through the transition to clean energy.
But AGL resisted, pointing out that it had a well-developed plan to replace Liddell's nominal 1680 megawatt capacity - it typically runs at about half that rate due to breakdowns - with a mix of wind farms, solar farms, gas peaking plants, batteries and "demand response" systems which it said would be more than enough to plug the gap left by Liddell's closure.
Mr Vesey told the summit that AGL is the largest CO2 emitter and "almost .. the largest owner operator of renewable energy in the country" and while there are risks in announcing plant closures early, the company is confident that the replacement synthetic generating plant for Liddell will be reliable and affordable for consumers.
"It is going to consist of replacing the energy from renewable sources using gas and storage technology for the capacity and we are really going to be able to demonstrate that all this concern around reliability, availability and cost by replacing coal with something else probably needs to be re-thought," Mr Vesey said.
"Now the fact is no one has done it before. So you have a bird in your hand called an existing coal plant, I get it but it is my job and the job of my people to bring people along with us in having those conversations and we are working very hard to do that."
He said he was confident that AGL could bring the government - which is mired in a parliamentary dual citizenship eligibility crisis that has put energy reform on the back burner - around to AGL's way of thinking on the Liddell site transformation.
"We will engage with government on a schedule to bring this about and take advice and continue to evolve but I am hopeful that we will continue down that path. I think we will come together."
Seven weeks ago they appeared to be on a collision course after Mr Vesey and outgoing chairman Jerry Maycock reiterated the plan at AGL's annual meeting - drawing hostile responses from Mr Turnbull and then Deputy Prime Minister Barnaby Joyce.