2017 – Solar Statistics

How did the solar panels fare over 2017?

Here’s a graph showing monthly output displayed against the average of what we would expect (the green line), and the last six years averaged

Month 2017 Daily Average kWh % of expected Cumulative tonnes of CO2e saved 2012 to 2017 Average %
January 21.66 60% 88.66 84%
February 48.91 83% 89.27 106%
March 101.30 101% 90.67 109%
April 154.47 106% 92.80 97%
May 162.35 104% 95.05 96%
June 170.84 103% 97.25 104%
July 164.32 107% 101.48 116%
August 141.98 107% 99.52 109%
September 101.18 90% 102.83 103%
October 64.64 88% 103.73 95%
November 43.98 98% 104.20 82%
December 23.09 76% 104.63 74
Year Average 99% 16.27

As with previous years we had greater generation in the summer months and lower over the winter, but overall the generation was bang on target.

The particularly low figure for January 2017 was again a problem with inverter, from the previous squirrel damage. Again R-ECO – the installers – came to assess the problem. They identified the remains of an old squirrel nest under the third panel from the left on the bottom row. They cleared the nest and found damage to one of the panel cables. They cut off the damaged cable and inserted a short DC extension cable to make up the length removed. R-ECO believe this squirrel damage pre-dates the installation of the squirrel netting so it is likely that this has been the source of the insulation resistance fault for some time. However in late December 2017 we noticed a new small problem with the inverter so we will continue to monitor this problem.

 

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