SOLAR POWER GENERATION SYSTEM

There is provided an inverter (1) to be applied to a solar power generation system (10) interconnecting with a system bus (7). The inverter measures a system voltage (Vr) of the system bus (7), detects a voltage drop of the system bus (7), based on the measured system voltage (Vr), controls a DC voltage (Vdc) by an MPPT (22) when the voltage drop is not detected, and performs control to raise the DC voltage (Vdc) without relying on the MPPT (22) when the voltage drop is detected.