Opposition Leader Mark McGowan has called for the resignation of government minister Peter Collier over what he called the mismanagement of the Muja AB power plant.

This morning Mr McGowan said it was "scandalous" that the plant which Premier Colin Barnett said would be funded by private investment was now costing tax payers $250 million and was not even functioning properly.

He said he believed the cost to tax payers would translate into higher power prices.

Colin Barnett is yet to respond to questions about the issue, which is set to be brought up on Wednesday in Parliament.

Mr Collier was energy minister at the time the decision was made to resurrect the 47-year-old Muja AB power plant and he has since been elevated to the portfolio of education.