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2011-12 sunlight data and performance guarantee analysis (West Yorkshire)

Analysis of sunlight hours data shows that solar PV systems in West Yorkshire installed after June 2011 will have suffered from reduced first year sunlight levels compared to the 1998-2010 average our predictions are based on.

This years unusually bad summer is largely to blame for this with sunlight hours around 40% below average in June and April, as well as July and August being 10 and 14% below average.

Most of the last 12 months were below average though, with March being the notable exception at 48% above average.

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