| 摘要 |
PROBLEM TO BE SOLVED: To provide an inverter device and a control method thereof which can prevent the chattering phenomenon of a linking switch with only the input voltage of an inverter device monitored and whose output can be drawn effectively without being wasted at the time of the low output of a solar battery, by preventing inrush current from flowing into an inverter device from a commercial system, when the output of a solar battery is not sufficient. SOLUTION: A diode 6 is formed between a system power source 3 and a DC capacitor 5, so that the inrush current does not flow into an inverter device 1 from the system power source 3. In order to draw as much output as possible, even if the output of a solar battery 2 decreases, when inverter input voltage reaches its minimum input voltage value, the inverter input voltage is controlled so as not to become lower than the minimum input voltage by conducting such control as the operating voltage of the solar battery 2 may be shifted from a voltage value at the maximum point to the open voltage side of the solar battery, or in such a direction so as to become higher. |
