My solar photovoltaic (PV) system has been grid connected just over a year now and yesterday I reached the landmark of 1500 units of electricity generated of which 1113 units (74%) have been exported to the grid. I am now almost 70% self-sufficient with regard to my electricity needs and so the next task is to work on that last 30%! The system was installed by Elementary Energy from Corofin and my case study on their website contains more technical details.
(See my separate post for more on my home energy project)
September 2012. On 11th September, total output passed the 2400 kWh mark of which 1848 units were exported (77%). My strategy is to maximise exports for optimal financial benefit and I have been achieving over 80% during the Summer months. It has been a good start to September- here's hoping it can reverse the run of 14 consecutive months below forecast - the poor end to September resulted in missing the forecast target but at least, for the second month in a row, I exceeded my 2011 figures.
July 2013. This was the warmest July on record in many stations and produced my highest monthly output yet of 211 kWh. Casement Aerodrome, the nearest station to me, had 150% of average sunshine (for the period 1981-2010) and touched 28.5 degrees C on the 12th July!
February 2014. I was playing around last year with some of the data in my spreadsheets and came up with this indicator which I think gives a good picture of average monthly intensity of solar energy especially when graphed. I simply multiply the output for each month (kWh) by 1000 and divide it by the number of hours clocked up by the system in that month so obviously the unit for this indicator is Watts.
January 2015. Here are the output data for the last four years:
12 June 2015. Despite the fact that we had the coldest May in twenty years there was reasonable sunshine and I've had the best start to a year since 2011. Nevertheless, for the second year in a row the output for May was less than that for April - not what should be happening. My system has now generated 5650 units of electricity of which 4422 units (78%) have been exported to the grid and I am about 68% self-sufficient with regard to my electricity needs. Pat