This paper presents the modeling of electrical I-V verification of photovoltaic modules using fiveparameter models based on the minimum usage of input data, which are usually provided by manufacturer's datasheet. However, we vary them with a step of 10 −4 , the ideality factor γ between 0.0 and 4 for each iteration in order to choose the γ value, which gives a minimal relative error of the maximum power point. Moreover, when γ is known, the other four parameters (i.e., R s , I 0 , I ph and R sh ) are known. Finally, the effectiveness of this approach is then validated through comparison of the experimental results data under outdoor weather conditions.
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