A solar power generation network shut-off unit comprises a first circuit breaker and second circuit breakers. The first circuit breaker is provided to a power line connecting a plurality of solar power generation modules and a power conditioner in series. When an emergency shut-off button is pressed, the supply of power from the solar power generation modules through the power line is shut-off, and an emergency shut-off signal is transmitted. The second circuit breakers are provided to each of a plurality of solar power generation modules, and when an emergency shut-off signal is received from the first circuit breaker, the supply of power from the plurality of solar power generation modules through the power line is shut-off.