References & Credits
Figures from DECC – the Department of Energy & Climate Change, updated March 2014
average unit costs in the South West of England based on consumption of 3,800 kWh per year were, 15.79 pence per kWh = £600 per year or £50 per month.
Installation estimate based on a property in central Swindon with a 30 degree roof slope (pitch), no shading, 20 degrees off south, a large 12 panel installation offering peak generation of 3 kW and a monthly electricity bill of £50 per month.
Annual income in the first year of £516, made up of £369 from the Feed-in-Tariff, £61 from exporting electricity to the grid and £87 money saved off the bill. Generating 2563 Kilo Watt Hours of electricity and saving over 28 tonnes of CO2 over the lifetime of the panels assumed to be 25 years.
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