NOVELTY - The device has a leg (3) arranged distinct from a central pivot (1) for supporting a portion of weight of a radial framework (2). The leg includes a rolling member (6) with contact zones for contacting with ground (19). A drive motor (9) of the rolling member drives the framework in angular displacement around a swiveling axis (7). A photovoltaic surface (4) is arranged on the framework to convert solar electromagnetic energy into electric power. A control unit (10) controls a layer (17) of the framework according to position of sun across the sky.    USE - Swiveling sprinkler heliotrope device for producing electrical energy to a local power grid during day, and for watering plantations in a ground i.e. cultivated ground located at a lower part of a radial framework, during night using the electrical energy from the grid.    ADVANTAGE - The device improves the nominal output of photovoltaic panels irrespective to the climatic conditions, and is durable and resistant to various climatic conditions and winds. The design of the radial framework makes the device to be simple to operate and inexpensive to manufacture. The device consumes less electrical energy for watering purposes. The device enables cooling of photovoltaic panels to improve energy efficiency of the panels, utilizes cooling water to sprinkle plantations and allows automatic watering of the plantations during the day by minimizing the water evaporation effect of the ground. The device is connected to the grid to which electrical energy is supplied by the device, for ensuring watering of the plantations during night at regular intervals, without requiring expensive and heavy power batteries, which are harmful for the environment.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for watering a ground.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic three-fourth view of a sprinkler heliotrope device for a ground.    Central pivot (1)    Radial framework (2)    Leg (3)    Photovoltaic surface (4)    Rolling member (6)    Swiveling axis (7)    Drive motor (9)    Control unit (10)    Layer (17)    Ground (19)