Solar power generation system

A solar power generation system comprising:

• a string including a plurality of solar cell module groups connected in series with each other, each of the solar cell module groups of said plurality of solar cell module groups including a plurality of solar cell modules;
• an inverter connected to the string, the inverter configured to convert DC power output from the solar cell modules to AC power;
• and
• shut-off devices respectively installed in electrical paths connecting between the solar cell module groups, the shut-off devices configured to sever a connection between the solar cell module groups in accordance with a control signal from the inverter;
• wherein each of the shut-off devices includes a signal receiving unit configured to receive the control signal from the inverter, and a bypass circuit configured to cause the signal receiving unit to receive the control signal from the inverter in a state where the connection between the solar cell module groups is cut off;
• and
• wherein the shut-off devices are further configured to output a voltage signal to the inverter after severing the connection between the solar cell module groups in accordance with the control signal from the inverter.