Abstract: The invention regards an apparatus for mounting a flat screen on a surface wherein the flat screen comprises at least two fixtures. The apparatus comprises, two mounting members adapted to be attached to the fixtures on the flat screen and a wire with one end connected to one of the mounting members and the other end connected to the other mounting member. The mounting members comprise an axle adapted for the wire to be coiled around for changing the length of free wire between the mounting members and retaining means at a radially greater distance from the wire coiled around the axle, adapted to retain the wire hereby preventing uncoiling of the wire.

Abstract: The invention relates to an apparatus for controlling an energy flow between a solar energy source and an electric motor. An electrical circuit having an energy flow control device is arranged between the input side and the output side. In accordance with one aspect of the invention, the circuit has an energy store, which is connected to the energy flow control device. This energy flow control device is designed to pass energy stored in the energy store to the motor in the event of a predetermined first voltage threshold of the energy store being exceeded. The invention also relates to a solar energy source having a corresponding apparatus and to a method for controlling an energy flow.