It is not possible to give an estimate of what your system will generate without visiting your property, as there are five main factors that will affect how much energy your system will generate:

  • Total size of the PV array (number of panels)
  • Latitude of the location
  • Direction the panels face
  • Angle the panels are mounted
  • Any shading

However, to give you an idea we would expect a typical unshaded 4kWh system installed on the south facing roof of house in Derbyshire to produce at least 3840kWh of electricity annually.