I’ve often talked about how in this part of the world we say a season begins on the first of the month (December, March, June, and September), and not on the solstices or equinoxes. However, those astronomical dates are very relevant to one particular thing: Hours of sunlight. For me, the related season is kind of beside the point.
Hours of sunshine dramatically affects how much I have to pay for electricity: The more sunshine, the less I pay, thanks to my solar panels. This is something I’ve talked about before, and especially about how the winter months (and the month either side) electricity generally costs me much more than in the summer months (and the month either side). That’s because the longer days of summer, combined with the higher aspect of the sun, means I generate much more electricity than in the shorter days with lower sun angle. The angle of the sun matters because in winter afternoon it dips behind neighbouring houses much earlier than in the summer months, making already short days even shorter for power generation.
I have a special device that prioritises my solar power going to the electric hot water heater if my panels are producing enough electricity. In the winter months the days are shorter and often overcast or rainy, and that means I may not generate enough power to heat the water. When that happens, I can push the “boost” (as it’s called) button on that special device to take electricity from the grid to power the hot water heater, which it does for an hour. I usually do that after 10pm, when the rates are lower.
Every winter I have a couple mornings or so in which my shower is, at best, quite warm, rather than hot in any sense, so I push the button. Recently, though, I had a couple family members staying with me for awhile, and because of the shorter, rainier days and three adults using hot water, I had to push the “boost” button several times. As always, I did that after 10pm, however, during a rainy spell I also hit the boost button in the evening, too, to give us a fighting change of having hot water for showers in the morning.
Had I been able to afford batteries when I had the panels installed, this possibly wouldn’t be a problem because I could use the stored power to heat the water, however, that still only applies of there’s enough sunshine to generate enough electricity to charge the batteries. So, I might still need to use that boost button, though possibly not as often.
I plan on looking into adding batteries, and also adding a few more panels, which, I think, should go on the roof toward the back of the house, which gets sunshine later into the afternoon, even in winter. We’ll see: None of that is cheap.
In the meantime, winter means that I use the boost button when necessary, and, whether I use it or not, I pay more for electricity. And that’s why I’m celebrating the June Solstice: As winter fades, sunlight hours increase, and so does my power generation, which, in turn, means my power bill will decrease, too. So, of course I celebrate the June Solstice!
The next of these events I’ll celebrate will be the arrival of Spring on September 1 (for me, one of only a few goods thing about that month…). The September Equinox will be on September 23 at 12:05pm NZST. We’ll see if I notice that, but I won’t be surprised if I ignore it.
The image of the sun in the photo up up top is from NASA's Solar Dynamics Observatory (NASA ID: PIA26681). It was taken on September 10, 2025.
