I dug deeper. Night is midnight till 8am. I thought it may have been something like 9pm to 7am, but having said that, weekends as well is great, Im looking at solar PV, so solar for the day and night/weekend rates seem a nice option
Many different retailers have different hours for day & night (off peak & peak). Genesis is generous to those in Christchurch with night rate (off peak) from 9PM to 7AM and all of SAT & SUN. Others (I think Meridian) for Christchurch residents I think start from 11pm to 7am.
Incidentally, I don't know why the hydro generators would allow price spikes to occur if they can shift their water allowance for the day around. They should be allocating more water to those periods where the prices are highest, thereby causing prices to equalise, somewhat. Perhaps the demand forecast is having trouble adjusting to the changeover to winter temperatures and demand?
As I said before, the wholesale market pricing is RIGGED! Even Bitcoin prices don't spike 300 - 600% daily and this is where it will hurt Flick users. You have to wonder why hydro generation can't simply meet the demand and smooth out these price spikes. But it's also in their interest NOT to increase hydro generation as the water is a store of energy. They need it to last through the summer months.
Why do people have to suffer with all these wholesale price spikes? Nowhere else experiences such erratic, HUGE swings in prices and with the concerns of climate change, I don't think it's a good time to be buying electricity at the open market rates. Hedging is a ways to provide certainty.