Translation of the I-V curves of solar cells and modules for irradiance G and device temperature T is investigated. A new translation procedure based on the linear interpolation/extrapolation is proposed, in order to translate the I-V curves to target conditions of G and T The accuracy of the method is investigated based on the indoor and outdoor experimental I-V curves of various kinds of photovoltaic (PV) cells and modules. The calculated the I-V curves over a wide range of G and T well agree with experimental results for various kinds of PV cells and modules. These results indicate that the translation of the I-V curve based on the method is effective for estimating the performance of the PV devices under various climatic conditions. (C) 2008 Elsevier B.V. All rights reserved.