In March 1995, a small scale wind and solar hybrid power system was in
stalled at Ashikaga Institute of Technology. Until now, the authors ha
ve acquired the data of the output of the hybrid power giant along wit
h wind speed, wind direction, and the solar radiation, in order to dem
onstrate a complementary relationship between solar energy and wind en
ergy. After nine months operation of the system, the authors confirmed
that there exists a complementary relationship between solar energy a
nd wind energy. We also found, however, that the power output by wind
does not have much prospect compared to that by solar cell especially
in summer season in Ashikaga area.