06. Solar panels are often seen on the roofs of houses (a) Describe the action and purpose of a solar panel. (2) (b) Photovoltaic cells transfer light energy to electrical energy. in the UK, some householders have fitted modules containing photovoltaic cells on the roots of their houses, Four modules are shown in the diagram. Module containing photovoltaic cells The electricity company pays the householder for the energy transferred. The maximum power available from the photovoltaic cells shown in the diagram is 14 x 10: W. How long, in minutes, does it take to transfer 165 kJ of energy? Use the correct equation from Section C of the Physics Equations Sheet The = minutes (3)(c) When the modules are fitted on a rool, the householder gets an extra electricity meter to measure the amount of energy transferred by the photovoltaic cells. The diagram shows two readings of this electricity meter taken three months apart. The readings are in kilowatt-hours (kWh). 21 November 0 0 0 4 4 21 February 0 0 1 9 4 Calculate the energy transferred by the photovoltaic cells during this time period. Energy transferred = KWh (1) () The electricity company pays 40p for each KWh of energy transferred. Calculate the money the electricity company would pay the householder. Money paid = (2) () The cost of the four modules is E6000. Calculate the payback time in years for the modules. Payback time = (3) (iv) State an assumption you have made in your calculation in part (lil). (1)