Abstract: Disclosed is a method for measuring and calculating a current-voltage curve and a current mismatch between junctions of a tandem solar cell, including at least two solar subcells, the method being performed under simulated solar irradiance according to the international standard illumination AM1.5. The method implies the illumination by a first broad-spectral band light source S1 and includes steps for calculating the necessary light intensities of narrow-band second and the third light sources. The steps of the method achieve to determine adapted gains for second and the third light sources, so that the combination of the light sources S21 and S22 provide the same test results of the solar cell as when illuminated with the first light source S1 only. Also disclosed is a solar cell test apparatus configured to realize the method of the invention.

Abstract: The invention refers to a solar testing device (11) for testing a solar module (6). The solar testing device (11) comprises a test area (12) for the solar module (6) to be tested, a light emitting area (16) comprising an array of LED-modules (17, 17A) arranged opposite to the test area (12) and arranged in a pitch (P) to each other. Further the solar testing device (11) comprises sidewall mirrors (21) extending in the direction from the light emitting area (16) to the test area (12). Guides (26) are provided having each an abutting surface (27) for supporting the solar module (6) whereby the abutting surfaces (27) of the guides (26) lie in the plane (A) of the test area (12).

Abstract: The invention relates to a testing device for testing a photovoltaic device having an electrical contact area, the testing device comprising: a support base for supporting the photovoltaic device, the support base having a support surface for receiving the photovoltaic device, a measurement device, at least one electrical wire for temporarily establishing an electrical contact between the measurement device and an electrical contact area of the photovoltaic device, the electrical wire is a flexible wire being electrically conductive and arranged to receive the photovoltaic device between the support surface and the flexible wire, at least a portion of the flexible wire abuttingly adapts along its longitudinal extension against the electrical contact area of the photovoltaic device when the photovoltaic device is received by the support surface.