Put the amp meter in a parallel circuit and make sure the setting is correct.
As the brightness increases the amperage out put should increase,once there is adequate light to turn on the cell the voltage should remain constant.Does the amperage output of a solar cell change depending on how much light there is?
The ammeter will short out the array when you connect just the ammeter. You need a load of some sort, like a power resistor. Take the rated voltage and current and divide them to get the value of the resistor. Multiply them to get the wattage requirement for the resistor.
Now put the ammeter in series with the load and connect that to the array output.
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