To calculate your kWH per month or per year just multiply by the number of days in that period. Retrieve the cost per unit of heating product from your heating bill. At 1000 kWh a 75 bill credit kicks in dropping your average rate to 75kWh.
Ofgem the industry regulator uses 3100 kWh per year as their average whereas GOVUK uses 3800 kWh per year.
One kWh equals a thousand watts of energy used in an hour. However the latest stats show that the average UK household in 2017 used 3374 kWh. IC The initial capital investment or Capex is the total cost of the entire installation which according to AWEA American Wind Energy Association is about 13 million for a 1-MW 1000 kW turbine. For example electricity cost is per kilowatt hour or kWh oil is per gallon and natural gas is per 100 cubic feet.