Momentum has continued to shift towards software billionaire Mike Cannon-Brookes’ plan to refresh AGL Energy’s board even as some investors and experts cast doubt on whether his goal to steer the giant electricity supplier onto a 1.5 degree warming path is achievable.

The powerful industry superannuation sector is backing three of the four directors nominated by AGL’s biggest shareholder for the seats up for election at the AGM on November 15 in a bid to fast-track its exit from coal power.