This map shows the amount of energy received from the Sun in a given location.
This was very interesting stuff (well, at least for me).
I wrote a little utility to retrieve the data in a form suitable for post-processing in a spreadsheet and for use in my power tracking system .
This utility is available there. It's written in python, run it with --help as an argument to see the various options available.
One direct application, was measuring on how well the CEEG panels I have installed performed according to the amount of energy they receive from the sun.
It gave me this graph:
The black line shows the average of Export/Import. Any points above the line means the system performed better than average, any points below the line, mean they performed worse.
A clear trend shows that my system performs really well when there's a lot of sun, but rather poorly in low light conditions.
It's rather a worry, as it means they will likely perform poorly during winter.
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