Lake Macquarie MP Greg Piper has called for facts, not ideology, to determine when Eraring Power Station closes.

The plant's owner, Origin Energy, reached an agreement with the state government last year to extend the life of Eraring by two years through to August 2027 in order to provide stability to the grid.

However, momentum has been growing in recent months to extend the 2,880 megawatt coal-fired generator again through to 2029.

Origin chief executive Frank Calabria recently said Origin was assessing security of supply, affordability and emissions before committing to a final plan for Eraring.

Mr Piper, whose electorate takes in Eraring, said he would support keeping the plant going if it was needed to provide energy security.

"I believe that Eraring can rightly be called a din

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