The impact on testing precision of solar modules by the correction parameter of solar simulator

When the testing temperature has a deviation to 25°C and an unsuitable setting of the correction parameter, the result of the solar simulator shows an error value which has a large distance with the correct one. The paper tries to prove that the precision of solar simulator has great relationship not only with the temperature coefficients but also the curve correction factor. Finally, the correct setting value is obtained through research and the error of the research result is less than 1% of the value with in the temperature of 15–37°CV.