Operations Related to the Advanced User

1

Grid Code

Set this parameter based on the grid code of the country or region where the inverter is used and the inverter application scenario.

2

Isolation settings

Set the working mode of the inverter based on the grounding status at DC side and the connection to the power grid.

1

Insulation resistance protection threshold (MΩ)

To ensure device safety, the inverter detects the insulation resistance of the input side with respect to ground when it starts a self-check. If the detected value is less than the preset value, the inverter does not connect to the grid.

1

MPPT multi-peak scanning

When the inverter is used in scenarios where PV strings are greatly shaded, set this parameter to Enable, and then the inverter will perform MPPT scanning at regular intervals to locate the maximum power.

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2

MPPT multi-peak scan interval (min)

Specifies the MPPT scanning interval.

This parameter is displayed when MPPT multi-peak scanning is set to Enable.

3

RCD enhancement

RCD refers to the residual current of the inverter to the ground. To ensure device and personal safety, RCD should be limited to the specified value in the standard. If an AC switch with a residual current detection function is installed outside the inverter, this function should be enabled to reduce the residual current generated when the inverter is running, thereby preventing the AC switch from misoperations.

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4

Night-time reactive power output

In some specific application scenarios, a power grid company requires that the inverter can perform reactive power compensation at night to ensure that the power factor of the local power grid meets requirements.

This parameter is displayed when Isolation settings is set to Input ungrounded, with TF.

5

PID protection at night

When the inverter outputs reactive power at night and this parameter is set to Enable, the inverter will shut down automatically if it detects abnormal status of the PID compensation.

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6

Power quality optimization mode

If this parameter is set to Enable, the inverter output current harmonics will be optimized.

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7

PV module type

This parameter is used to set different types of PV modules and the shutdown time of the concentration PV module. If the concentration PV modules are shaded, the power drops drastically to 0 and the inverter shuts down. The energy yield would be affected since it takes too long for the power to resume and inverter to restart. The parameter does not need to be set for crystalline silicon and filmy PV modules.

• If this parameter is set to Crystalline silicon or Film, the inverter automatically detects the power of PV modules when they are shaded and shuts down if the power is too low.
• When concentration PV modules are used:
  • If this parameter is set to CPV 1, the inverter can quickly restart in 60 minutes if the input power of PV modules drops drastically due to shading.
  • If this parameter is set to CPV 2, the inverter can quickly restart in 10 minutes if the input power of PV modules drops drastically due to shading.

8

Built-in PID compensation direction

When the external PID module compensates the PID voltage for the PV system, set Built-in PID compensation direction to the actual compensation direction of the PID module so that the inverter can output reactive power at night.

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9

String connection mode

Specifies the connection mode of PV strings.

• When PV strings connect to the inverter separately (All PV strings separated), there is no need to set this parameter. The inverter can automatically detect the connection mode of the PV strings.
• When PV strings connect to one another in parallel outside the inverter and then connect to it independently (All PV strings connected), set this parameter to All PV strings connected.

10

Automatic OFF due to communication interrupted

The standards of certain countries and regions require that the inverter must shut down after the communication is interrupted for a certain time.

If Automatic OFF due to communication interrupted is set to Enable and the inverter communication is interrupted for a specified time (set by Communication interruption duration), the inverter will automatically shut down.

11

Automatic ON due to communication resumed

If this parameter is set to Enable, the inverter automatically starts after communication recovers. If this parameter is set to Disable, the inverter needs to be started manually after communication recovers.

This parameter is displayed when Automatic OFF due to communication interrupted is set to Enable.

12

Communication interruption duration (min)

Specifies the duration for determining communication interruption. Used for automatic shutdown for protection in case of communication interruption.

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13

Soft start/boot time (s)

Specifies the duration for the power to gradually increase when the inverter starts.

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14

Shutdown gradient (%/s)

Specifies the power change speed when the inverter shuts down.

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15

Night-time hibernation

The inverter monitors PV strings at night. If this parameter is set to Enable, the monitoring function of the inverter will hibernate at night to reduce power consumption.

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16

MBUS communication

For inverters that support RS485 communication and MBUS communication, you are advised to set this parameter to Disable to reduce power consumption.

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17

Delay upgrade

This parameter is mainly used in the upgrade scenarios where the PV power supply is disconnected at night due to no sunlight or unstable at dawn or dusk due to poor sunlight.

After the inverter starts to upgrade, if Delay upgrade is set to Enable, the upgrade package is loaded first. After the PV power supply recovers and the activation conditions are met, the inverter automatically activates the upgrade.

18

RS485-2 communication

If this parameter is set to Enable, the RS485-2 port can be used. If the port is not used, you are advised to set this parameter to Disable to reduce power consumption.

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19

Duration for determining short-time grid disconnection (ms)

The standards of certain countries and regions require that the inverter should not disconnect from the power grid if the power grid experiences a short-time failure. After the fault is rectified, the inverter output power needs to be quickly restored.

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