Solar photovoltaic generation device

A solar photovoltaic generation device using a solar panel, the solar photovoltaic generation device comprising:

• a first electric power conversion unit configured to receive generated electric power generated by the solar panel as an input, convert the generated electric power to a first electric power, and output the first electric power;
• a solar battery connected to the first electric power conversion unit and configured to be chargeable with the first electric power output from the first electric power conversion unit;
• a second electric power conversion unit connected to the first electric power conversion unit and the solar battery, and configured to receive at least one of the first electric power output from the first electric power conversion unit or a second electric power output from the solar battery as an input electric power, convert the input electric power to a third electric power, and output the third electric power;
• and
• a control unit configured to control the solar battery and the first electric power conversion unit based on a state of the solar panel,
• wherein, in a case where it is determined that the generated electric power of the solar panel does not satisfy a predetermined value, the control unit is configured to disconnect the solar battery from the first electric power conversion unit and the second electric power conversion unit, stop providing a power supply to the first electric power conversion unit to execute a power saving control, and store, as a reference voltage, an open circuit voltage of the solar panel before a predetermined first time period elapses from the execution of the power saving control, and in a case where it is determined that the open circuit voltage of the solar panel exceeds the reference voltage continuously for a predetermined second time period after the power saving control is executed, the control unit is configured to connect the solar battery to the first electric power conversion unit and the second electric power conversion unit, and start providing the power supply to the first electric power conversion unit to release the power saving control.