Shortest Day of the Year

December 22, 2004 by · 6 Comments
Filed under: Solar Energy 

Well, yesterday was the shortest day of the year here in the Northern Hemisphere.

I haven’t seen the numbers from yesterday’s production, but we’ve been getting 9-12 kWh out of the solar panels on a sunny day in December.  Compare that to the record of 42 kWh on a sunny day in June, and you can see what a difference the lower angle of sunshine and shorter days has on the system.

Of course, we aren’t using the air conditioning at the moment either, so our usage is down.  We are using lights for longer hours in the evening and even morning now.

So now we turn back to longer days.  Our “net producer” months are predicted to be April, May and a bit of June.