SNOW-MELTING DEVICE FOR SOLAR CELL ATTACHED ROOF AND SNOW-MELTING CONTROLLING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a snow-melting device for a solar cell attached roof capable of promoting snow-melting efficiency and power generating efficiency. SOLUTION: The snow-melting device 20 includes an invertor 14 applying a predetermined voltage to a solar cell panel 11, a current detecting section 22 for detecting a current value flowing to the solar cell panel 11 in the case the predetermined voltage is applied to the solar cell panel 11 and a power source control section 23 for stopping the applied voltage from a power source section 21 when the current value detected by the current detecting section 22 becomes a set point set in advance. A state of fallen snow on the solar cell panel 11 can be decided by the current value flowing to the solar call panel 11, and when the fallen snow on the solar cell panel 11 is melted away, the applied voltage to the solar cell panel 11 can be automatically stopped. For that purpose, though there is no snow on the solar cell attached roof, the solar cell panel 11 is not heated, and the snow-melting efficiency and the power generating efficiency can be promoted.