We have a 2kW 8 panel solar array (Panasonic HIT panels), mounted on a south-facing roof at approximately 35-40° angle from the horizontal, which were installed at the end of August 2013.
This is the results for December 2014 (in red) with last year's results (green), and distribution by average sunlight 1971-2010 (met office stats) in blue:
The panels have done 30.57kWh this month, up a fraction on last year. The generation for December 2013 was 27.80kWh.
With 248 hours of daylight in December (sun up to sun down for all 31 days), the average kWh generated per hour of daylight in December 2014 was 0.14kW, up a fraction from last year's 0.12kW
The total generated for the year so far (September - December) is up 59.12kWh on last year's amount over the same period.
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