Why is energy policy dividing the Coalition?

The Prime Minister, Malcolm Turnbull, believes he has a winning formula with voters -- talking about energy prices.

Bức tranh vẽ nhà máy năng lượng mặt trời ở Nam Úc Source: AAP

His mission to ease the rapidly rising cost of household bills has given him reason to talk tough against the electricity providers, and make grand nation-building plans, like the Snowy Mountain hydroelectricity upgrade.

But Mr Turnbull's plans could be derailed - not by Labor or the Greens, but from his own backbench and in particular by former Prime Minister, Tony Abbott.