Three-phase Grid-tied Solar Inverter Electrical connection
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5.4.2 Parallel requirements for multiple inverters
Use multiple inverters to directly connect to the low-voltage three-phase grid solution. If the total
capacity of the inverters is greater than 1MVA, please contact our after-sales service personnel.
Use multiple inverters to connect the low-voltage side of the medium-voltage transformer, and the
high-voltage side directly connects to the medium-voltage grid. If the total capacity of the inverter is
greater than 1MVA, please contact our service personnel. At the same time, the transformer must meet
the total output of the inverter. Power requirements, and there is a neutral point or an external neutral
conductor.
It is recommended to use a transformer with short-circuit impedance ≤7%
5.4.3 Grid voltage requirements
Before installing the PV inverter, you need to confirm the working voltage of the AC side of the
product. There are two rated voltages of 400Vac and 480Vac;
For 400Vac systems, the AC side of the inverter can be directly connected to the
domestic three-phase power grid;
For the 480Vac system, the inverter needs to be connected to the three-phase
grid through a transformer, the transformer ratio is 480V/400V, and the capacity
refers to the actual inverter power.