@7 thanks, needed this
This is a good point.
The base load, geothermal, keeps everything going overnight, where stuff that stays on all night is the base load.
Then in the morning, they let water out of the top dams, which generates breakfast rush power.
The water runs down the river where a dam generates the lunchtime rush. Then later the dinner peak.
The dams store and don't generate if wind and solar are generating.
Gas generate for peaks responsive to sudden demand in Auckland.