The WA premier slammed the Opposition's ambitious renewable energy plan as "unachievable" in a press conference in Mandurah on Thursday.
Opposition leader Zak Kirkup said if the Liberal party was elected, publicly owned coal stations would be phased out by 2025.
Under the plan, WA would also have a net zero carbon emissions electricity system by 2030.
Mr Kirkup, who is Dawesville MP, said the plan was the biggest renewable energy policy in Australia, with the WA Liberal government set to contribute $400 million alongside $16 billion worth of public and private investments.
"What is exciting about this plan is that it will not only deliver net zero emissions, but it will also create hundreds of thousands of new jobs, build new industries and cut the cost of power for business and consumers," he said.
The plan includes transitioning workers in the coal industry into "long-term, secure jobs" and providing them with financial security as the coal industry was wound down in Western Australia.
"This mega-project will provide a meaningful contribution to reaching the global ambition of a clean energy future."
Key elements of the plan include introducing more wind, solar and large-scale battery industries, creating 200,000 more jobs by 2025, and cutting power bills for households and businesses.
However, Premier Mark McGowan said the plan was "unachievable".
"On the eve of the election suddenly the Liberal party that for 10 years has fought any action on climate, any action on hydrogen, any action on renewables releases a policy embracing all of them," he said.
"If the policies they said this morning were to be implemented all it would mean is many billions of extra debt, huge increases in family power bills, rolling blackouts across the state, and huge job losses.
"The time frame they put on their policy this morning is totally unachievable."
Collie-Preston Labor candidate Jodie Hanns said the decision to close publicly owned coal stations in four years would be the death of towns such as Collie.
"This is the death of our town and the way that we know life in our town," she said.
"This is an attack on the South West and people's jobs and livelihoods.
"We can't have an overnight decision that derails the work that Labor has already done in the past four years."
