Characteristic measuring device for solar cell

A solar cell characteristic measuring device having a load circuit for a solar cell that is configured such that an electronic load device for enabling a load current or load voltage to be variably set is connected to the solar cell and a measuring circuit configured such that a voltage detector and a current detector are connected to the load circuit, characterized by comprising:

• an operation point control means for controlling an operation point of the solar cell by sectionalizing magnitude of a load taken from the solar cell by the electronic load device in a range from an open state of the solar cell till a short-circuit state of the solar cell and stepwise changing the magnitude of the load while periodically intermittently operating the electronic load device in the load circuit and a processing means for reading detection values of the voltage detector and the current detector of the measuring circuit during a period when an output voltage of the solar cell is stable every operation period of the electronic load device and processing the read data to determine an output characteristic, wherein
• the operation point control means is configured to apply an operation instruction to the electronic load device at a predetermined period,
• a time width of the operation instruction is set to be longer than a time period from application of a load to the solar cell till stabilization of the output voltage or current thereof,
• the processing means monitors a variation of output voltage or current of the solar cell after the operation instruction to the electronic load device and reads the detection values of the voltage detector and the current detector at a time when no change is detected, and
• the operation point control means suspends the operation instruction immediately after the reading operation to stop the electronic load device till a next operation instruction is given.