Abstract
In this work a method of measuring the temperature of photocells is considered. A series of works are analyzed in which noted that temperature fluctuations of environment and photocell significantly affect output characteristics of photovoltaic cells. Temperature measurements are used in maximum power point tracking algorithms, for calculating the thermal coefficients of photocells. The described method uses yttrium iron garnet crystal placed in a constant magnetic field and magnetized to saturation as a sensing element of the device. To measure the temperature change the polarization plane rotation angle of transmitted light in the crystal dependence on temperature is used
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