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 January 2015 (in red) with last year's results (green), and distribution by average sunlight 1971-2010 (met office stats) in blue:
The panels have done 51.37kWh this month, up 16.71kWh on last year.
With 248 hours of daylight in January (sun up to sun down for all 31 days), the average kWh generated per hour of daylight this month was 0.21kW, up considerably from last year's 0.14kW.
The total generated for the year (Sept-Jan) is up 75.12kWh compared to the same period last year.
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