SOLAR BATTERY POWER GENERATION MODULE AND DEVICE FOR DIAGNOSING NUMBER OF CONNECTED MODULES

摘要

PROBLEM TO BE SOLVED: To enable legally unqualified workers to safely install a solar battery power generation panel. SOLUTION: A control circuit 51 diagnoses whether or not the output of an in-module power conversion circuit 50 is connected to a system interconnection inverter (8), and when the output is not connected to the inverter (8), suppresses the output voltage of the circuit 50 to a level for safety operator or lower. When the output is connected to the inverter (8), the circuit 51 sets the output voltage of the circuit 5 to a normal operating voltage. Consequently, the safety of workers can be secured, because no high voltage is impressed upon the output terminal of a solar battery module, until the module is actually fixed to a roof or another prescribed position and connected to the inverter (8) via a current collecting bus line 6. After the module is connected to the bus line 6, in addition, the module can automatically start its normal high- voltage outputting operations.