Rotation apparatus of pole system for photovoltaic power generation

A rotation apparatus of a pole system for photovoltaic power generation installed at an upper end of a pole to rotate a solar panel array, the rotation apparatus comprising:

• a first tubular body connected to the solar panel array;
• a second tubular body coupled below the first tubular body and fixed to the upper end of the pole;
• a gear unit to transmit a rotating force to the first tubular body;
• a driving motor to provide the rotating force to the gear unit;
• and
• a contact part including at least three contact points installed at a coupled part of the first tubular body and the second tubular body and held in contact during a relative rotation between the first tubular body and the second tubular body to transmit power or a signal,
• wherein the solar panel array includes a plurality of solar panels connected in series,
• wherein the contact part includes a first contact point, a second contact point and a third contact point,
• wherein two terminals of output of all the plurality of solar panels are connected to the first contact point and the second contact point,
• wherein two terminals of output of some of the plurality of solar panels are connected to the first contact point and the third contact point, and
• wherein an output power through the first contact point and the second contact point is supplied to a power inverter, and an output power through the first contact point and the third contact point is supplied to the driving motor.