Setting Inverter Parameters

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.

Isolation settings

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

Output mode

Specifies whether the inverter output has a neutral wire based on the application scenario.

V-phase grounded

The default value is Disable. Set this parameter to Enable when the phase wire from the transformer to the inverter is grounded.

PQ mode

If this parameter is set to PQ mode 1, the maximum AC output power equals the maximum apparent power. If this parameter is set to PQ mode 2, the maximum AC output power equals the rated output power.

Automatically start upon grid recovery

Specifies whether to allow the inverter to automatically start after the power grid recovers.

• Enable: The inverter automatically starts when the power grid recovers from a fault or outage.
• Disable: The inverter does not automatically start when the power grid recovers from a fault or outage. The inverter starts only after a startup command is delivered.

Grid connected recovery time from grid faults (s)

Specifies the time after which the inverter begins restarting after the power grid recovers.

Grid reconnection voltage upper limit (V)

The standards of certain countries and regions require that after the inverter shuts down for protection due to a fault, if the power grid voltage is higher than Grid reconnection voltage upper limit, the inverter is not allowed to reconnect to the grid.

Grid reconnection voltage lower limit (V)

The standards of certain countries and regions require that after the inverter shuts down for protection due to a fault, if the power grid voltage is lower than Grid reconnection voltage lower limit, the inverter is not allowed to reconnect to the grid.

Grid reconnection frequency upper limit (Hz)

The standards of certain countries and regions require that after the inverter shuts down for protection due to a fault, if the power grid frequency is higher than Grid reconnection frequency upper limit, the inverter is not allowed to reconnect to the grid.

Grid reconnection frequency lower limit (Hz)

The standards of certain countries and regions require that after the inverter shuts down for protection due to a fault, if the power grid frequency is lower than Grid reconnection frequency lower limit, the inverter is not allowed to reconnect to the grid.

Reactive power compensation (cosφ-P) trigger voltage (%)

Specifies the voltage threshold for triggering reactive power compensation based on the cosφ-P curve.

Reactive power compensation (cosφ-P) exit voltage (%)

Specifies the voltage threshold for exiting reactive power compensation based on the cosφ-P curve.

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.

Voltage unbalance protection threshold (%)

Specifies the inverter protection threshold when the power grid voltage is unbalanced.

Phase protection point (º)

The Japanese standard requires that during passive islanding detection, protection should be triggered if an abrupt voltage phase change is detected.

Phase angle offset protection

The standards of certain countries and regions require that the inverter needs to be protected when the phase angle offset of the power grid three phases exceeds a certain value.

10-min overvoltage protection threshold (V)

Specifies the 10-minute overvoltage protection threshold.

10-min overvoltage protection duration (ms)

Specifies the 10-minute overvoltage protection duration.

Level-N OV protection (V)

Specifies the level-N grid overvoltage protection threshold.

Level-N OV protection time (ms)

Specifies the level-N grid overvoltage protection duration.

Level-N UV protection (V)

Specifies the level-N grid undervoltage protection threshold.

Level-N UV protection time (ms)

Specifies the level-N grid undervoltage protection duration.

Level-N OF protection (Hz)

Specifies the level-N grid overfrequency protection threshold.

Level-N OF protection time (ms)

Specifies the level-N grid overfrequency protection duration.

Level-N UF protection (Hz)

Specifies the level-N grid underfrequency protection threshold.

Level-N UF protection time (ms)

Specifies the level-N grid underfrequency protection duration.

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.

-

MPPT multi-peak scan interval (min)

Specifies the MPPT scanning interval.

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

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.

-

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.

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.

-

Strong adaptability

If the power grid short-circuit capacity or PV plant installed capacity is less than 3, the power grid quality will be affected if the power grid impedance is too high, which may cause the inverter to malfunction. In this case, if the inverter is required to work properly, set this parameter to Enable.

-

Power quality optimization mode

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

-

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.

PID compensation direction

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

PID compensation direction must be consistent with PV module compensation voltage direction of the PID module.

Built-in PID running mode

Specifies the operation mode of the inverter built-in PID.

-

PID nighttime off-grid repair

Specifies whether to enable the PID nighttime off-grid repair.

If PID running mode is not set to Disable, the parameter can be set.

PID daytime off-grid repair

Specifies whether to enable the PID daytime off-grid repair.

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.

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.

Communication interruption duration (min)

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

-

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.

Soft start/boot time (s)

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

-

Shutdown gradient (%/s)

Specifies the power change speed when the inverter shuts down.

-

AFCI

The North American standard requires that the inverter should have DC arc detection function.

-

AFCI detection adaptive mode

Adjusts the sensitivity of arc detection.

This parameter is displayed only when AFCI is set to Enable.

AFCI self-test

Send the AFCI self-check command manually.

-

Current error during the scan (A)

To prevent inaccurate scanning caused by sunlight change, the current change of PV strings operating properly should be monitored when the I-V curves of PV strings are being scanned. When the current exceeds the specified value, it is determined that the sunlight changes. The I-V curves should be scanned again.

-

OVGR associated shutdown

If this parameter is set to Enable, the inverter shuts down after receiving the OVGR signal. If this parameter is set to Disable, the inverter does not shut down after receiving the OVGR signal.

This parameter is displayed if the Japanese grid code is selected.

Dry contact function

Identifies the dry contact signals from the SmartLogger.

Set this parameter to OVGR for OVGR signals, and set it to NC for other signals. This parameter is displayed if the Japanese grid code is selected.

Commanded shutdown hold after power recovery

The standards of certain countries and regions require that if the inverter is shut down after receiving a command and powered on again after power recovers, it should still be in commanded shutdown state.

-

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.

-

MBUS communication

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

-

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.

-

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.

String monitor

The inverter monitors PV strings in real time. If any PV string is abnormal (such as the PV string is shaded or the electric energy yield decreases), the inverter generates an alarm to remind maintenance personnel to maintain the PV string in a timely manner.

If PV strings are often shaded, you are advised to set String monitor to Disable to prevent false alarms.

String detection reference asymmetric coefficient

Specifies the threshold for determining PV string exception. The false alarms caused by fixed shadow shading can be controlled by changing this parameter.

This parameter is displayed when String monitor is set to Enable.

String detection starting power percentage (%)

Specifies the threshold for starting PV string exception detection. The false alarms caused by fixed shadow shading can be controlled by changing this parameter.

OFF at 0% power limit

If this parameter is set to Enable, the inverter shuts down after receiving the 0% power limit command. If this parameter is set to Disable, the inverter does not shut down after receiving the 0% power limit command.

-

Maximum apparent power (kVA)

Specifies the output upper threshold for the maximum apparent power to adapt to the capacity requirements of standard and customized inverters.

If the maximum active power equals the value of Smax_limit, this parameter is not displayed.

Maximum active power (kW)

Specifies the output upper threshold for the maximum active power to adapt to different market requirements.

For 1000 V inverters, this parameter is configurable only for the SUN2000-25KTL-US, and the maximum value is 27.5 kW.

Tracker controller

Selects a controller vendor.

-

Adjust total energy yield (kWh)

Specifies the initial energy yield of the inverter. This parameter is used in inverter replacement scenarios. Set the initial energy yield of the new inverter to the total energy yield of the old inverter to ensure continuous statistics of cumulative energy yield.

-

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.

-

Buzzer

If this parameter is set to Enable, the buzzer sounds when the DC input cable is incorrectly connected. If this parameter is set to Disable, the buzzer does not sound when the DC input cable is incorrectly connected.

-

LVRT

LVRT is short for low voltage ride-through. When the grid voltage is abnormally low for a short time, the inverter cannot disconnect from the power grid immediately and has to work for some time.

-

Threshold for triggering LVRT (V)

Specifies the threshold for triggering LVRT. The threshold settings should meet the local grid standard.

This parameter is displayed when LVRT is set to Enable.

LVRT compensation power factor of reactive power in positive sequence

During LVRT, the solar inverter needs to generate positive-sequence reactive power to support the power grid. This parameter is used to set the positive-sequence reactive power generated by the solar inverter.

For example, if you set LVRT compensation power factor of reactive power in positive sequence to 2, the increment of positive-sequence reactive current generated by the solar inverter is 20% of the rated current when the AC voltage decreases by 10% during LVRT. If you set LVRT compensation power factor of reactive power in positive sequence to 0, the increment of positive-sequence reactive current generated by the solar inverter is 0 regardless of how much the AC voltage decreases during LVRT.

LVRT compensation power factor of reactive power in negative sequence

During LVRT, the solar inverter needs to generate negative-sequence reactive power to support the power grid. This parameter is used to set the negative-sequence reactive power generated by the solar inverter.

For example, if you set LVRT compensation power factor of reactive power in negative sequence to 2, the increment of negative-sequence reactive current generated by the solar inverter is 20% of the rated current when the AC voltage decreases by 10% during LVRT. If you set LVRT compensation power factor of reactive power in negative sequence to 0, the increment of negative-sequence reactive current generated by the solar inverter is 0 regardless of how much the AC voltage decreases during LVRT.

Percentage of LVRT reactive current limiting

During LVRT, the device needs to limit the reactive current.

For example, if you set Percentage of LVRT reactive current limiting to 50, the reactive current upper limit of the device is 50% of the rated current during LVRT.

Threshold of LVRT zero-current mode

When Zero current due to power grid fault is set to Enable, if the power grid voltage is less than the value of Threshold of LVRT zero-current mode during LVRT, the zero current mode is used. Otherwise, the mode configured in LVRT mode is used.

LVRT mode

Sets LVRT mode. The options are Zero-current mode, Constant current mode, Reactive power priority mode, and Active power priority mode.

HVRT

HVRT is short for high voltage ride-through. When the grid voltage is abnormally high for a short time, the inverter cannot disconnect from the power grid immediately and has to work for some time.

-

Threshold for triggering HVRT (V)

Specifies the threshold for triggering HVRT. The threshold settings should meet the local grid standard.

This parameter is displayed when HVRT is set to Enable.

HVRT compensation power factor of reactive power in positive sequence

During HVRT, the solar inverter needs to generate positive-sequence reactive power to support the power grid. This parameter is used to set the positive-sequence reactive power generated by the solar inverter.

For example, if you set HVRT compensation power factor of reactive power in positive sequence to 2, the increment of positive-sequence reactive current generated by the solar inverter is 20% of the rated current when the AC voltage increases by 10% during HVRT.

LVRT undervoltage protection shield

Specifies whether to shield the undervoltage protection function during LVRT.

This parameter is displayed when LVRT is set to Enable.

Grid voltage protection shield during VRT

Specifies whether to shield the undervoltage protection function during LVRT or HVRT.

This parameter is displayed when LVRT or HVRT is set to Enable.

VRT active current limiting (%)

Specifies the percentage of the maximum active current to the rated current during fault ride-through (FRT).

-

VRT active power recovery gradient

Specifies the recovery rate when the active current recovers to the value at the moment before FRT.

-

Grid voltage jump triggering threshold (%)

Specifies the LVRT or HVRT threshold for triggering a transient voltage jump of a power grid. A transient voltage jump indicates that the inverter cannot immediately disconnect from the power grid when the power grid is abnormal due to transient changes.

This parameter is available when Grid code is set to VDE 4120.

Zero current due to power grid fault

Certain countries and regions have requirements on the output current during high/low voltage ride-through. In this case, set this parameter to Enable. After this parameter is set to Enable, the output current is less than 10% of the rated current during high/low voltage ride-through.

This parameter is displayed when LVRT or HVRT is set to Enable.

Active islanding protection

Specifies whether to enable the active islanding protection function.

-

Passive islanding protection

Specifies whether to enable the passive islanding protection function.

This parameter is displayed if the Japanese grid code is selected.

Voltage rise suppression

The standards of certain countries and regions require that when the output voltage exceeds a certain value, the inverter must suppress voltage rise by outputting reactive power and reducing active power.

-

Voltage rise suppressing reactive power adjustment point (%)

The standards of certain countries and regions require that the inverter generate a certain amount of reactive power when the output voltage exceeds a certain value.

• This parameter is displayed when Voltage rise suppression is set to Enable.
• The value of Voltage rise suppressing active power derating point must be greater than that of Voltage rise suppressing reactive power adjustment point.

Voltage rise suppressing active power derating point (%)

The standards of certain countries and regions require that the active power of the inverter be derated according to a certain slope when the output voltage exceeds a certain value.

Voltage rise suppression P-U curve

The standards of certain countries and regions require that the P-U curve be set.

This parameter is displayed when Voltage rise suppression is set to Enable.

Voltage rise suppression Q-U curve

The standards of certain countries and regions require that the Q-U curve be set.

Frequency change rate protection

Set this parameter to Enable to protect the inverter when the grid frequency changes too fast.

-

Frequency change rate protection threshold (Hz/s)

Specifies the frequency change rate protection threshold.

This parameter is displayed if Frequency change rate protection is set to Enable.

Frequency change rate protection duration (s)

The inverter is protected when the grid frequency change duration exceeds the value.

Soft start time after grid failure (s)

Specifies the time for the power to gradually increase when the inverter restarts after the power grid recovers.

-

CT anomaly detection

If this parameter is set to Enable, the inverter automatically checks whether CT cables are disconnected or connected in reverse polarity and reports an alarm to the SmartLogger.

-

Churn mode

If this parameter is set to Enable, the Backup Box switches to this mode (off-grid mode) when the grid fails.

-

Reserved backup capacity

When Churn mode (off-grid mode) is set to Enable and the battery SOC reaches this value, the battery stops discharging to ensure that the SOC is above this value.

The association is displayed when Churn mode (off-grid mode) is set to Enable.

Grid-tied/Off-grid switching mode

If this parameter is set to Automatic, the system switches to the off-grid mode when the grid fails, and switches to the grid-tied mode when the grid recovers.

Switch to off-grid

This parameter is displayed only when Grid-tied/Off-grid switching mode is set to Manual. To manually switch to off-grid mode, select the box on the left and click Submit.

Voltage in independent operation

AC operating voltage level of the inverter in off-grid mode can be 101 V or 202 V.

Microgrid compatibility

The default value is Disable. If the inverter and diesel generator run in parallel, set this parameter to Enable. When Microgrid compatibility is set to Enable, the grid-connected current source inverter supports a higher ratio of PV to energy storage in addition to the feature of the original country grid code.

If this parameter is set incorrectly, the inverter may run abnormally.

Remote power schedule

If this parameter is set to Enable, the inverter responds to the scheduling instruction from the remote port. If this parameter is set to Disable, the inverter does not respond to the scheduling instruction from the remote port.

-

Schedule instruction valid duration (s)

Specifies the time for maintaining the scheduling instruction.

When this parameter is set to 0, the scheduling instruction takes effect permanently.

When this parameter is set to 0, the scheduling instruction takes effect permanently.

Maximum apparent power (kVA)

Specifies the output upper threshold for the maximum apparent power to adapt to the capacity requirements of standard and customized inverters.

If the maximum active power equals the value of Smax_limit, this parameter is not displayed.

Maximum active power (kW)

Specifies the output upper threshold for the maximum active power to adapt to different market requirements.

-

OFF at 0% power limit

If this parameter is set to Enable, the inverter shuts down after receiving the 0% power limit command. If this parameter is set to Disable, the inverter does not shut down after receiving the 0% power limit command.

-

Active power change gradient (%/s)

Specifies the change speed of the inverter active power.

-

Derated by fixed active power (kW)

Adjusts the active power output of the inverter by fixed value.

This parameter is displayed if Remote power schedule is set to Enable.

For 1000 V inverters, the maximum value of this parameter for the SUN2000-25KTL-US is 27.5 kW.

Derated by active power % (%)

Adjusts the active power output of the inverter by percentage.

If this parameter is set to 100, the inverter outputs based on the maximum output power.

This parameter is displayed if Remote power schedule is set to Enable.

If this parameter is set to 100, the inverter outputs based on the maximum output power.

Reactive power change gradient (%/s)

Specifies the change speed of the inverter reactive power.

-

Plant active power gradient (min/100%)

Specifies the rate of active power rise due to sunlight changes.

-

Average active power filtering time (ms)

Specifies the period of active power rise due to sunlight changes. This parameter is used with Plant active power gradient.

-

PF (U) voltage detection filtering time (s)

Specifies the time for filtering the grid voltage in the PF-U curve.

-

Reactive power adjustment time (s)

Specifies the adjustment time for the reactive power to reach the target value during reactive power adjustment.

-

Power factor

Specifies the power factor of the inverter.

This parameter is displayed if Remote power schedule is set to Enable.

Reactive power compensation (Q/S)

Specifies the reactive power output by the inverter.

Night-time reactive power compensation (Q/S)

During the reactive power compensation at night, the reactive power is scheduled by percentage.

-

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.

Enable reactive power parameters at night

When this parameter is set to Enable, the inverter outputs reactive power based on the setting of Reactive power compensation at night. Otherwise, the inverter executes the remote scheduling command.

This parameter is displayed when Night-time reactive power output is set to Enable.

Night-time reactive power compensation (kVar)

During the reactive power compensation at night, the reactive power is scheduled by fixed value.

This parameter is displayed when Night-time reactive power output and Enable reactive power parameters at night are set to Enable.

Overfrequency derating

If this parameter is set to Enable, the active power of the inverter will be derated according to a certain slope when the grid frequency exceeds the frequency that triggers overfrequency derating.

-

Frequency for triggering overfrequency derating (Hz)

The standards of certain countries and regions require that the output active power of inverters be derated when the power grid frequency exceeds a certain value.

• This parameter is displayed when Overfrequency derating is set to Enable.
• When setting this parameter, ensure that the following condition is met: Frequency for exiting overfrequency derating ≤ Frequency for triggering overfrequency derating < Cutoff frequency of overfrequency derating.

Frequency for exiting overfrequency derating (Hz)

Specifies the frequency threshold for exiting overfrequency derating.

Cutoff frequency of overfrequency derating (Hz)

Specifies the frequency threshold for cutting off overfrequency derating.

Cutoff power of overfrequency derating (%)

Specifies the power threshold for cutting off overfrequency derating.

Frequency detection filtering time (ms)

Specifies the frequency detection filter time.

Overfrequency derating power drop gradient (%/s)

Specifies the decrease rate of the overfrequency derating power.

Power recovery gradient of overfrequency derating (%/min)

Specifies the recovery rate of the overfrequency derating power.

Voltage derating

If this parameter is set to Enable, the active power of the inverter will be derated according to a certain slope when the grid voltage exceeds the voltage that triggers overfrequency derating.

-

Voltage derating start point (V)

Specifies the start point for voltage derating.

• This parameter is displayed when Voltage derating is set to Enable.
• When setting this parameter, ensure that the following condition is met: Voltage derating start point < Voltage derating stop point.

Cut-off point of voltage derating (V)

Specifies the stop point for voltage derating.

Voltage derating cut-off power (V)

Specifies the power threshold for cutting off voltage derating.

Communication disconnection fail-safe

In the inverter export limitation scenario, if this parameter is set to Enable, the inverter will perform active power derating by percentage when the communication between the inverter and the SmartLogger or Smart Dongle is disconnected for more than the time specified by Communication disconnection detection time.

N/A

Communication disconnection detection time (s)

Specifies the fail-safe detection time for the disconnection between the inverter and the SmartLogger or Smart Dongle.

This parameter is displayed when Communication disconnection fail-safe is set to Enable.

Active power output limit for fail-safe (%)

Specifies the derating value of the inverter active power by percentage.

Apparent power baseline (kVA)

Adjusts the apparent output baseline of the inverter.

-

Active power baseline (kW)

Adjusts the active output baseline of the inverter.

-

Frequency modulation control

The standards of certain countries and regions require that if the power grid frequency fluctuates around a certain value, the inverter needs to fine-tune the active power output based on Frequency modulation control droop to help stabilize the power grid frequency. In this case, set this parameter to Enable

-

Adjustment ratio of frequency modulation control

Specifies the droop of the active power output.

This parameter is displayed when Frequency modulation control is set to Enable.

Underfrequency rise power

The standards of certain countries and regions require that if the power grid frequency is lower than Frequency for triggering of underfrequency rise power, the inverter needs to increase the active power output to help increase the power grid frequency. In this case, set this parameter to Enable.

-

Frequency for triggering of underfrequency rise power (Hz)

Specifies the frequency threshold of Underfrequency rise power.

This parameter is displayed when Underfrequency rise power is set to Enable.

Power recovery gradient of underfrequency rise (%/min)

Specifies the recovery rate of Underfrequency rise power.

Cutoff frequency of underfrequency rise power (Hz)

Specifies the cutoff frequency of Underfrequency rise power.

Cutoff power of underfrequency rise power (%)

Specifies the cutoff power of Underfrequency rise power.

Frequency for exiting of underfrequency rise power (Hz)

Specifies the exit frequency of Underfrequency rise power.

PV String Access Detection

PV String Access Detection is set to Disable by default. After solar inverters are connected to the power grid, set PV String Access Detection to Enable.

Startup current

When the current of all connected PV strings reaches the preset value, the PV string access detection function is enabled.

Startup current for 2-in-1 detection

When the current of a PV string reaches Startup current for 2-in-1 detection, the PV string is automatically identified as 2-in-1.

You are advised to retain the default settings.

PV string N access type

Set this parameter based on the type of the PV string connected to DC input terminal N of the solar inverter. Currently, the options are as follows: Automatic identification (default value), Disconnection, Single PV string, and 2-in-1.

You are advised to retain the default value. If the value is incorrectly set, the PV string access type may be incorrectly identified and alarms may be generated by mistake for the PV string access status.

Working status

Indicates the current working status of the battery, which can be Offline, Idle, Running, Faulty, or Hibernating.

Working mode

Indicates the current working mode of the inverter battery control.

Charge/Discharge power

Total charge and discharge power of all batteries connected to the inverter.

SOC

Indicates the power status of all batteries connected to the inverter.

Bus voltage

Indicates the voltage on the DC bus of the battery.

Bus current

Indicates the current on the DC bus of the battery.

Rated capacity

Total rated capacity of all batteries connected to the inverter. The rated capacity refers to the total amount of energy discharged by the batteries in normal conditions.

Current-day charge capacity

Total energy charged into the batteries on the current day.

Current-day discharge capacity

Total energy discharged from the batteries on the current day.

Total charge

Total energy charged into the batteries.

Total discharge

Total energy discharged from the batteries.

Firmware version

Software version of the DC/DC module.

SN

Serial number of the DC/DC module.

Working status

Indicates the current working status of the energy storage unit, which can be Offline, Idle, Running, Faulty, or Hibernating.

Rated capacity

Total amount of energy discharged by the energy storage unit in normal conditions.

Voltage

Voltage of the energy storage unit.

Current

Current of the energy storage unit.

Internal temperature

Temperature inside the energy storage unit.

SOC

Indicates the power status of the energy storage unit.

Charge/Discharge power

Indicates the charge or discharge power of the energy storage unit.

Current-day charge capacity

Total energy charged into the energy storage unit on the current day.

Current-day discharge capacity

Total energy discharged from the energy storage unit on the current day.

Total charge

Total energy charged into the energy storage unit.

Total discharge

Total energy discharged from the energy storage unit.

Battery model

Models of the energy storage unit, including LG-RESU and LUNA2000.

Battery pack

Firmware version

Software version of the battery pack.

SN

Serial number of the battery pack.

Working status

Indicates the current working status of the battery pack, which can be Offline, Idle, Running, Faulty, or Hibernating.

Voltage

Voltage of the battery pack.

Charge/Discharge power

Indicates the charge or discharge power of the energy storage unit.

Highest temperature

Indicates the highest temperature detected in the battery pack.

Lowest temperature

Indicates the lowest temperature detected in the battery pack.

SOC

Power status of the battery pack.

Total discharge

Total energy discharged from the battery pack.

Energy Storage Unit

Displays or sets the battery model. The system automatically identifies and displays the correct model. Generally, you do not need to manually modify the information.

Maximum charge power

Sets the maximum power for battery charging.

Maximum discharge power

Sets the maximum power for battery discharging.

Charge from AC

If this parameter is set to Enable, the batteries can be charged from the power grid.

Maximum charge power of grid

Sets the maximum power for charging the batteries from the power grid.

Charge cutoff capacity

When the SOC of the battery reaches this value, charging stops.

Max. depth of discharge

When the SOC of the battery reaches this value, discharging stops.

Grid charge cutoff SOC

When the SOC of the battery reaches this value, the grid stops charging the battery.

Charge/Discharge

Forced charge/discharge operation, which can be Charge, Discharge, or Stop.

Mode Settings

To enter the forced charge/discharge mode, set Duration or Target SOC.

Duration

Sets the duration of forced charge/discharge. When the time is reached, the forced charge/discharge stops automatically. This parameter is displayed when Mode Settings is set to Duration.

Charged energy

Sets the target SOC for forced charge/discharge. When the SOC reaches this value, the forced charge/discharge stops automatically. This parameter is displayed when Mode Settings is set to Target SOC.

Discharged energy

Current charged energy in this forced charge/discharge