The above chart of November 2009, shows that the four facilities, daily have approximately the same effectiveness (kWh / kWp)

A graph, where one of the installations, exhibits a defect or a problem, I have (fortunately) not.

Below is a graph of the month in December 2009, where you can see a few special events.

Until the 16th the performance is quite similar despite the fickle weather.

On the 17 there is a thin layer of snow on all panels. That is why almost nothing is generated.

On the 18 you can see that Bart removed the snow from the panels, and that at Philip and Paul, some snow has melted and slid from the panels. With us (Eddie) nothing slipped (our panels are at an angle of 30°, while the other three at an angle of 35° or 45°.)

On December 19, because of the snow on the panels, I was the only one that could not benefit from the sun on the panels.

On December 20 there is a new layer of snow on the panels.

On December 25 all the snow has drifted or rained off the panels and from then on, the performances are again parallel.