Fremgangsmåde til diagnosticering af fejl i solcellemoduler

摘要

There is provided a method for fault diagnosis on a solar module in which electrical potentials are checked within the solar module to provide the possibility for carrying out the fault diagnosis even when the solar module is flot exposed to 5Ufl light. Specifically the solar cell module is excited by both a DC BIAS and an AC voltage over a wide frequency range, and the impedance of the solar cell module is measured as a function of the frequency response.