EvoEnergy examined the average annual system outputs for solar panel installations for every city in the UK to calculate the annual energy savings.
Constants:
| Constants | ||
| System size | 2.88 | kWp |
| System Cost | £6142 | Based on 2.88kWp system; Suntellite 240 wP Panel & Delta Inverter; August 2012 |
| Price per kWh | £0.1439 | Source: http://www.energysavingtrust.org.uk/Using-this-site/Our-calculations |
| Export tariff rate | £0.045 | Source: http://www.decc.gov.uk/en/content/cms/news/pn12_066/pn12_066.aspx |
| Generation tariff rate | £0.16 | Source: http://www.decc.gov.uk/en/content/cms/news/pn12_066/pn12_066.aspx |
Sources:
http://www.ofgem.gov.uk/Media/FactSheets/Documents1/domestic%20energy%20consump%20fig%20FS.pdf
http://re.jrc.ec.europa.eu/pvgis/apps4/pvest.php#
Notes:
Total Annual benfit refers to: bill savings plus generation and export tariff payments, per annum
EvoEnergy assume that an average household will use 50% of the energy generated, and export 50% back to the grid
EvoEnergy assume that a typical system would be situated in a due south position, with an elevation of 35 degrees