From elsewhere:
reply this applies to NSW, South Australia and part of Queensland.
As for everybody in the same time zone .. they are all seeing the same sun angle at noon (more or less) and all sharing the same over supply of power from all the grid connected solar power rooftops and farms. It's free surplus power during that time frame.
Yeah i get that they're all seeing similar but you'd still want to align this new demand with the output curve in some form of approximated pattern. Plus also prevent the sharp spike you'd get from everyone turning on their stuff at a coordinated hour. You're gonna have a bunch of stuff on timers all hit this at the same time. That makes life hard for the people balancing the grid's supply & demand.
replyBit like in the UK they had issues with everyone watching popular TV shows and then turning on the kettle after in a perfectly syncronized timing across the country
There's too much available power then (curtailment/negative prices are fairly common now on sunny days), and not enough during the evenings, so it's an incentive for those who don't have/can't get batteries (e.g. renters) to shift their habits. It also can be spun as a cost-of-living action.
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