Daily production
December
26, 2006:
Daily production measured over the entire year
Gauging is knowing my father used to say. This saying holds true
even today in the digital age. My dad needed special graph paper, a pencil
and a ruler. I have at my disposal a spreadsheet program.
Shown here is the daily production in 2005 of my complete solar PV system
(I have added extra panels over the years; today the system is a 2,5 kWp
array).
The spreadsheet calculated the graph and the trend line (the curved line) This trend line matches the solar insolation. Of course this is no surprise. Note that during the summer there was hardly any day that production dipped below 2 kWh. Even on Christmas Day the system produced thanks to clear skies 1 kWh, in spite of the low sun and short daylength.
December 26, 2006: Hourly production measured on typical days
| Below is a graph that shows the output per 100 Wp panel on May 12, October 21 and December 21 (2001). All days held in common that the sky was clear and crisp, with sunshine all day. May 12 was a warmer and a more humid day than October 21. | |||||||||
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