A partial solar eclipse occured yesterday (20 mar 2015). According to the astronomical data, In my place, the sun lost 72.5 % of its power at 10:34 AM.

On the graphics below one can clearly see the impact of the eclipse on the available electrical power during the phenomenon. The minimum occurs a few minutes after 10:30. At this moment, the available power was very close to 800 Watts (see left hand scale). By graphical interpolation one can determine the power that would have been available without the eclipse: approximately 3000 Watts.

Maximal loss of power during the eclipse = (1 - 800/3000) = 0,733 = 73 %. This is very close to the forecast.

The eclipse had no adverse impact on the total production because the overall available energy was still greater than 10 KWh.

For comparison, the following chart shows the solar power available on the 19th as well:

The temperature of the solar panels is indicated by the red line on the following chart (use right hand scale) :