Folks, slow the heck down. I kind of think I broke this wide open on the other Q&A thread.

There exists a website you can go to to get crowdsourced photovoltaic generation data.

You might have to sign up for an account to see all the pages, they limit how many pages an individual person can see because it's got to be a fairly expensive website to host.

From that site you can find solar installations all over the place.

Here's one in Enschede Netherlands, where on 22 September of this year it was predicted that sunrise would be 7:18 AM, and sunset 7:30 PM.

https://www.pvoutput.org/intraday.jsp?id=37744&sid=34523&dt=20170922In case they rate limit all of you people from hitting their website and melting it, here's the data from near sunrise:

22/09/17 7:30AM 0.003kWh 0.001kWh/kW 15W 12W 0.004kW/kW - - - -

22/09/17 7:25AM 0.002kWh 0.001kWh/kW 4W 12W 0.004kW/kW - - - -

22/09/17 7:20AM 0.001kWh 0.000kWh/kW 0W 0W 0.000kW/kW - - - -

22/09/17 7:15AM 0.001kWh 0.000kWh/kW 0W - - - - - -

And here's the data from near sunset:

22/09/17 7:30PM 10.954kWh 3.580kWh/kW 2W 12W 0.004kW/kW - - - -

22/09/17 7:25PM 10.953kWh 3.579kWh/kW 0W 0W 0.000kW/kW - - - -

22/09/17 7:20PM 10.953kWh 3.579kWh/kW 0W 0W 0.000kW/kW - - - -

22/09/17 7:15PM 10.953kWh 3.579kWh/kW 0W 0W 0.000kW/kW - - - -

22/09/17 7:10PM 10.953kWh 3.579kWh/kW 11W 12W 0.004kW/kW - - - -

22/09/17 7:05PM 10.952kWh 3.579kWh/kW 22W 12W 0.004kW/kW - - - -

22/09/17 7:00PM 10.951kWh 3.579kWh/kW 33W 24W 0.008kW/kW - - - -

The "Teams" feature on that page gives you a great way to find different locations. For example, here's someone in Australia:

https://www.pvoutput.org/list.jsp?id=5847&sid=4691Clicking "map" shows this guy is in Cairns.

timeanddate.com says 6:06 AM and 6:12 PM for sunrise/sunset.

Sunrise:

22/09/17 6:40AM 0.048kWh 0.009kWh/kW 252W 192W 0.036kW/kW - - - -

22/09/17 6:30AM 0.016kWh 0.003kWh/kW 96W 78W 0.014kW/kW - - - -

22/09/17 6:20AM 0.003kWh 0.001kWh/kW 36W - - - - - -

Sunset:

22/09/17 6:00PM 21.648kWh 4.005kWh/kW 12W 24W 0.004kW/kW - - - -

22/09/17 5:50PM 21.644kWh 4.004kWh/kW 60W 66W 0.012kW/kW - - - -

22/09/17 5:40PM 21.633kWh 4.002kWh/kW 96W 120W 0.022kW/kW - - - -

OK, so we have Netherlands and Australia, both with 12 hour days.

But Cairns is kind of North, so let's try South Australia.

https://www.pvoutput.org/intraday.jsp?id=3332&sid=2590&dt=20170922Millicent, Australia, 37 degrees south latitude.

https://www.timeanddate.com/sun/@2157652?month=9&year=2017Predicted sunrise/sunset:

5:58 - 6:04

Sunrise data:

22/09/17 6:30AM 0.029kWh 0.009kWh/kW 180W 180W 0.055kW/kW 19.7C - 0.042kWh -

22/09/17 6:25AM 0.014kWh 0.004kWh/kW 96W 96W 0.029kW/kW 19.7C - 0.042kWh -

22/09/17 6:20AM 0.006kWh 0.002kWh/kW 48W 48W 0.015kW/kW 19.7C - 0.042kWh -

22/09/17 6:15AM 0.002kWh 0.001kWh/kW 24W - - 19.7C - 0.042kWh -

Sunset data:

22/09/17 6:05PM 14.725kWh 4.476kWh/kW - - - 20.8C - 1.192kWh 484W

22/09/17 6:00PM 14.725kWh 4.476kWh/kW - - - 20.9C - 1.158kWh 465W

22/09/17 5:55PM 14.725kWh 4.476kWh/kW - - - 21.0C - 1.116kWh 938W

22/09/17 5:50PM 14.725kWh 4.476kWh/kW - - - 21.0C - 1.067kWh 655W

22/09/17 5:45PM 14.725kWh 4.476kWh/kW 12W 12W 0.004kW/kW 21.1C - 1.019kWh 1,159W

22/09/17 5:40PM 14.724kWh 4.475kWh/kW 12W 12W 0.004kW/kW 21.1C - 0.959kWh 492W

22/09/17 5:35PM 14.723kWh 4.475kWh/kW 24W 24W 0.007kW/kW 21.2C - 0.917kWh 636W

These things all show a bit of a lag from sunrise to the point where power is actually flowing off of the panels, and they lose power before sunset, but it's clear that power is generated for about 11.5 hours in all these places.

This website has approximately a million such locations recorded.

Now that we have millions of independent observations of equinox actually meaning equinox, can we move on to the next thing, please?

It's also clear by looking at other dates, that timeanddate.com sunrise and sunset times are accurately predicted. Can we stop questioning that as well please?