This work proposes a new analytical model to extract the 1-Diode/2-Resistor solar\ncell/panel equivalent circuit parameters. The methodology is based on a reduced amount of\nexperimentally measured information: short-circuit current, the slope of the I-V curve at that point,\nthe open-circuit voltage, and the current and voltage levels, together with the slope of the I-V curve at\nthe instantaneous operation point. This procedure is specially designed to analyze the performance\nof autonomous photovoltaic systems, which are most of the primary sources for spacecraft power.\nResults show good agreement with experimental data. Furthermore, this methodology allows for\nfast and accurate I-V curve maximum power point (MPP) identification.
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