Solar power generation network shut-off unit and a solar power generation network shut-off system provided with same

A solar power generation network shut-off unit that is disposed between a plurality of solar power generation modules and a power conditioner and that shuts off a supply of power from the solar power generation modules to the power conditioner, the solar power generation network shut-off unit comprising:

• a first circuit breaker that is provided to a power line connecting the plurality of solar power generation modules and the power conditioner in series, the first circuit breaker configured to shut-off a supply of power from the solar power generation modules through the power line, and continuously transmit a communication signal;
• and
• second circuit breakers that are provided to each of a plurality of solar power generation modules, the second circuit breaker configured to receive the communication signal continuously transmitted from the first circuit breaker, and, when a specific length of time has elapsed since an interruption of a reception of the communication signal, shut-off a supply of power from the plurality of solar power generation modules through the power line, and transmit a shut-off completion signal to the first circuit breaker.