Up to 6 units. If you connect 7 or more inverters, the permissible output of control signals is exceeded. Be sure to use a high power factor converter with the capacity higher than the total capacity of the inverters connected. One or more of the inverters must have capacity more than half of the high power factor converter. (When connecting the FREQROL-A024 series inverters to the high power factor converter (FR-HC-7.5K), it is required to connect a single unit of the FR-A024-3.7K.) If the total inverter capacity is less than half the capacity of the high power factor converter, the converter can be used as a common converter or a regenerative converter. However, its harmonic suppression effect is reduced. When connecting multiple inverters, pay attention to the cable gauge since the inverter terminals P and N are connected via a junction terminal or transition wiring. (Refer to the figure below.) Connect the inverters in the order of capacity (inverter with the largest capacity first). Figure 1