I thought some readers without PV solar (or even those with it), might be interested in the graph below, which is a daily record of the generation from my solar panels, for one complete year, from October 2013 to September 2014. Click on the image to enlarge it. (Note: the y-axis should read kW (kilowatts) not kWh (kilowatt hours).
The black dots represent readings for the first 6 months from October to March and the red dots the remaining 6 months, from April to September.
As expected, the summer months show higher readings than the winter months, but it is interesting to see the huge variability that can occur in the summer months, with some days being at least as bad as a typical winter’s day. Winter readings are much less variable, with pretty much all days, especially in June and July, being pretty lousy.
I love graphs…..another example of a picture being worth a thousand words.
And since this weekend marks the winter solstice and the shortest day, I can expect those little red dots on the current year’s graph to slowly start climbing again!
Foodnstuff 
June 19, 2015 at 11:41 pm |
Thanks for showing that. Pictorial data is so interesting, well, to an ex-statistician it is.
I seems that for about eight months of the year the crazy weather we have engineered for ourselves means that we can no longer rely on any durable stability in the pattern of Sun hours for more than a few days. I don’t think this will prove to have been an exceptional year in that respect either.
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June 20, 2015 at 12:55 pm |
I’d guess that the ‘bad’ days in summer result from a change after a period of hot weather, with associated cloud and rain. I wasn’t prepared for how variable summer weather would be, though.
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June 20, 2015 at 6:23 am |
It would seem that you have a most unlikely supporter in our dear Mr T (Abbot) who appears to want solar over wind turbines Bev. I am guessing that one of his supporter mates has first dibs on solar technology and no finger in the pot when it comes to wind power ;). Excellent stats Bev 🙂
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June 20, 2015 at 12:57 pm |
He’ll never do anything for the good of the planet, that’s for sure! Pity he doesn’t have the brains to see that a healthy planet = healthy people.
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June 21, 2015 at 3:13 am |
You don’t need brains when your mates are multi billionaires and are pulling the strings 😦
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