The roof over the rear of the homes is at a 22 degree angle in order to maximise the south facing potential of the home. Also, as the the sun angle during winter is 20 degrees at midday, a 22 degree roof pitch maximizing the operating potential of the PV and solar thermal panels during the winter months when the sun is weaker.

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Fact 26

Automation of energy-using technologies
Controls for home heating and for energy-using appliances and electronic equipment could becomehighly sophisticated and controllable remotely to minimise energy use.
Source: Energy Saving Trust 2008