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Electrical Connection
8.3 AC Connection
NOTICE!
• Before connecting the inverter to the grid, approval must be received by local utility
as required by national and state regulations.
The inverter supports the EPS (off-grid) mode. When connected to the grid, the inverter
outputs go through the Grid connection terminal, and when disconnected from the grid,
the inverter outputs go through the EPS (off-grid) connection terminal.
Requirements for AC connection
• Grid voltage requirement
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The grid voltage and frequency must be within the allowable range
(220 V / 127 V for 5.5 kW and 8.3 kW inverter, 415 V / 240 V, 400 V /
230 V, 380 V / 220V for other models, 50 / 60 Hz) and comply with the
requirements of the local power grid.
• Residual Current Device (RCD)
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The inverter does not require an external RCD when operating. If an external
RCD is required by local regulations, a 300 mA Type-A RCD is recommended.
If required by local regulations, a Type-B RCD is also permitted.
• AC breaker
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An AC breaker that matches the power of the inverter must be used between
the inverter output and the power grid. Each inverter must be equipped with
an independent breaker or other load disconnection unit to ensure the safe
disconnection from the grid. For specific information on the AC breaker for
Grid and EPS (off-grid), see "5.3 Additionally Required Materials".
• EPS (off-grid) load
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Make sure that the rated power of the EPS (off-grid) load is within the rated
EPS output power range of the inverter. Otherwise, the inverter will report
an EPS Overload Fault alarm. The inverter will automatically clear the fault
when the first and second overload faults occur. When it occurs for the third
time, turn off some loads to meet the rated EPS output power range of the
inverter, and then press the ESC key on the LCD screen to clear the fault.
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When connecting to the EPS (off-grid) terminal:
Medical equipment Connection prohibited
Precision instrument Connection prohibited
Appliances susceptible to malfunctions in the
event of power outages during use
Connection prohibited
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For inductive loads such as refrigerators, air conditioner, washing machine,
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