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Electrical Connection
7.3 AC Connection
NOTICE!
• Before connecting the inverter to the grid, approval must be received by local utility
as required by national and state interconnection regulations.
The inverter has an EPS function. When the grid is connected, the inverter outputs go
through the on Grid terminal, and when the grid is disconnected, the inverter outputs go
through the EPS terminal.
Requirements for AC connection
• Grid Voltage requirement
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The grid voltage must be within the permissible range. The inverter is
suitable for rated voltage 400V/230V, 380V/220V, frequency 50/60Hz. Other
technical requests should comply with the requirement of the local public
grid.
• RCD requirement
»
The inverter does not require an external residual-current device
when operating. If an external RCD is required by local regulations, It is
recommended to use a Type-A RCD with the value of 300 mA. When
required by local regulations, the use of an RCD type B is permitted.
• AC breaker requirement
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An AC breaker that matches the power of the inverter must be connected
between the inverter output and the power grid, and each inverter must
be equipped with an independent breaker or other load disconnection unit
to ensure the safe disconnection from the grid. Refer to "4.3 Additionally
Required Materials" for specific data of AC breaker of Grid and EPS.
• Load requirement
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It is prohibited to connect any load between the inverter and the AC switch
that directly connects to the inverter.
• EPS load requirement
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Do not connect sensitive precision instruments or medical equipment to the
EPS terminal.
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Ensure that the EPS load rated power is within the EPS rated output power
range. Otherwise, the inverter will report an Overload Fault warning. When
Overload Fault occurs, turn off some loads to make sure it is within the EPS
rated output power range, and the inverter will return to normal after ESC
key on the LCD screen pressed.
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For inductive load such as fridge, air conditioner, washing machine, etc.,
ensure that the start power does not exceed the EPS peak power.
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