March 2015 – Solar Statistics

Here are the latest statistics for the generation from our solar panels on the CityWorks building in Gloucester.

Over the end of 2014 and the start of 2015 we had a problem with one of our inverters. R-ECO engineers came to have a look, but before they performed any intervention the inverter seemed to correct itself and generation has been back to normal since 28 February 2015.  However, we will keep a close eye on the inverter for the next few weeks.

The inverter issue explains why 2015 generation is comparatively low compared with previous years.

 Graph 1.  Average daily output – with the 2015 production in orange

GRC - Daily Average

 

Graph 2. Monthly output displayed against the average of what we would expect (the green line).

GRC - percentage of profile

Table 1. The numbers.

Month 2015 Daily Average kWh % of expected Cumulative tonnes of CO2e saved Month 2014 Daily Average kWh % of expected Cumulative tonnes of CO2e saved Month 2013 Daily Average kWh % of expected Cumulative tonnes of CO2e saved
January 29.68 79% 53.4 January 30.06 80% 35.4 January 37.05 98% 17.5
February 55.07 89% 54.0 February 72.83 118% 36.2 February 55.15 89% 18.1
March - - - March 124.15 118% 38.0 March 85.81 82% 19.4
April - - - April 130.7 86% 39.8 April 152.14 100% 21.4
May - - - May 156.0 95% 41.9 May 176.24 108% 23.8
June - - - June 196.53 113% 44.5 June 188.53 109% 26.3
July - - - July 198.13 124% 47.2 July 222.80 139% 29.4
August - - - August 153.93 111% 49.3 August 161.86 116% 31.8
September - - - September 127.93 109% 51.0 September 109.18 93% 33.2
October - - - October 70.12 91% 52.0 October 74.08 96% 34.2
November - - - November 41.50 88% 52.6 November 34.48 73% 34.7
December - - - December 27.68 87% 52.8 December 21.46 67% 35.0

For a more uncluttered view we have compared the generation so far for 2015 compared to the mean average for previous years.

Graph 3. Percentage of profile compared to mean average for the previous years.

2015 compared to average

Graph 4. Inverter readings. You can see the previous large problem which was caused by the squirrel damage. For the moment the inverters have gone back to normal without intervention, but we will keep a careful eye on them.

inverter readings

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