Why energy giants want to control solar batteries

It was a decision driven by spite for Sydney man Peter Anderson.  He was determined to buy a solar battery for his home so he could take money away from the big power companies, while never receiving a hefty power bill again.  But his plan came unstuck after agreeing to participate in a so-called virtual power plant.  Today, energy reporter David Mercer on Peter’s dilemma, how giving back to the grid really works and whether it’s worth it.  Featured:  Dan Mercer, ABC energy reporter