Saturday, 11 January 2014

cloudy afternoon

Here’s today’s solar PV electricity generation, from sunrise (8:05 GMT) to sunset (16:09 GMT), with data points every 5 minutes.  We generated 25.1 kWh in total.

vertical scale: kW; green line: total energy generated; blue line: energy generated from top row of 15 panels; brown line: energy generated from bottom row of 12 panels

Despite the weather forecast being for clear skies all day, there were large clouds this afternoon for the sun to hide behind.  So we were right to run the washing machine this morning.

Maybe it was hiding because of its spots.

Today’s sun, with its enormous spots. Image from NASA’s current solar images page

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