Solar power generation system provided with sun-chasing mechanism

A solar power generation system comprising a solar module in which incident light is subjected to photoelectric conversion to afford an output and a sun-chasing mechanism for driving and controlling said solar module based on said output from said solar module, said sun-chasing mechanism having a drive means for changing a direction of said solar module, a drive-controlling means for controlling said drive means, an output detection means for detecting said output from said solar module, and a clock means for transmitting information relating to date and time to said drive-controlling means, wherein said sun-chasing mechanism behaves to perform sun-chasing of said solar module such that the solar module is driven by a first sun-chasing mode when sun shines;

• when the output value from the solar module becomes to be below a fist prescribed value, the first sun-chasing mode is switched to a second sun-chasing mode based on said output value from the solar module and an output value from said clock means, and the solar module is driven by said second sun-chasing mode;
• and when the output from the solar module becomes to be above a second prescribed value, the second sun-chasing mode is switched to the fist sun-chasing mode and the solar module is driven by the fist sun-chasing mode;
• and wherein the sun-chasing mechanism behaves such that when the output value from the solar module becomes to be below a third prescribed value at a time within a range of a first prescribed time from a sunset time computed from the clock means, the sun-chasing of the solar module is terminated.