Cloudy December gives Poor Solar Generation

With the full data set now loaded it's clear why December 2015 was so bad for solar panels.

http://solar-panels-review.321web.co.uk/index.php/yearly-comparison-of-solar-pv

The number of days below 2kWh generated was 23, compared to around 14 for previous years. In addition the maximum peak output was only 7.6kW compared to over 9kW previously.

http://solar-panels-review.321web.co.uk/index.php/solar-power-month-by-month/12-monthly-uk-solar-panel-electricity-output-for-december

Hopefully this won't be the pattern set by global warming with warmer, wetter, cloudier winters that hit solar panel generation, although the winter numbers are small so it would be far more drastic if the summers became cloudier!


December 2015 compared to previous years - almost half the electricity generated compared to 2014!

Month	Earliest Start Time	Latest End Time	Max Peak Output kW	Total Monthly Output	Total Generation Time (hours)	Min Daily Generation kWh	Max Daily Generation kWh
12/2015	08:00	15:45	1.956	68.351	205	0.381	7.61
12/2014	08:05	15:55	2.124	123.87	208	0.077	8.837
12/2013	08:10	15:50	2.412	100.546	204	0.145	9.015
12/2012	08:05	15:45	1.992	90.864	201	0.237	8.324
12/2011	08:00	15:55	2.136	103.37	212	0.359	8.542

Rainy December & November 2015 Reduces Solar Panel Output

The final months of 2015 have been exceptionally poor for our solar panels with both November and December 2015 recording the worst generation figures in the whole 4 years since our panels were installed.






The wet cloudy weather that caused severe flooding across the UK also mean that the sun was rarely seen and very little electricity was generated giving only 81kWh for November and a paltry 69kWh for December compared to previous historical lows of 112kWh for November and 91kWh for December.


The full comparison is available on the site http://solar-panels-review.321web.co.uk/index.php/yearly-comparison-of-solar-pv


November compared to previous years
 

Month	Earliest Start Time	Latest End Time	Max Peak Output kW	Total Monthly Output	Total Generation Time (hours)	Min Daily Generation kWh	Max Daily Generation kWh
11/2015	07:20	16:05	2.304	81.341	231	0.69	7.004
11/2014	07:10	16:20	2.460	112.411	224	0.088	10.07
11/2013	07:20	16:20	2.640	126.815	231	0.256	11.073
11/2012	07:15	16:20	2.580	150.373	233	0.469	10.988
11/2011	07:15	15:50	2.112	51.508	88	0.979	8.176



Rainy December November 2015 reduces Solar Panel Output