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MidNite Solar Classic 150 SL
The lines on the graph represent the Classic output current at different Max Power Points Voltage (not VOC). To estimate the Max Power Point of your system; first you have to find out the VOC of the Photovoltaic strings connected to the Classic. For example If 5 Modules in series in one string and STC VOC rating is 36.6V, then the VOC of the string equals: 5(modules) * 36.6v(STC VOC) = 183V.
The rule of thumb says that the MPP will be around 80% of the string's VOC; 183v * 0.8 = 146.4v On the graph of the Classic model you have, the X axis represents the Battery Voltage and the Y axis is the Output current. Knowing that, go to the corresponding graph and look for the a line close to your system's MPP voltage and you can then determine the max output power for your system design.
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Specifications & Documents
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