Q&A

Analysis：

If actual battery voltage is normal, while, battery voltage on LCD is abnormal, you should doubt if battery sample circuit has some trouble.

Test Method：

    (1) Firstly, disconnect battery from the inverter and test the battery voltage separately.

    (2) If battery voltage is normal, then connect battery into the inverter and check battery voltage on LCD. Try to adjust to the battery on LCD via inverter battery voltage setting.

Solution:

    (1) Only connect battery to inverter( Don’t connect to utility, PV system and load).

    (2) Press UP and Down at the same time for 3 seconds and type 111 , then press Enter

    (3) Select battery page, S means reduce the voltage, A means increase the voltage.    

    (4) For example, LCD displays 53V and the multimeter displays 50V, then type 3V on S state, and press enter to save it.

    (5) If the above method failed to fix this problem. Try to replace mainboard.

Analysis：

    It may be caused by load or inverter hardware problem.

Test Method：

    (1) Disconnect load from inverter, then check if 05 fault will disappear.

    (2) If 05 fault still occurs, switch off the inverter until black screen, then set the knob into diode setting on your multimeter and test AC output. If beeping, there is short circuit inside the inverter.

Solution：

    (1) If it is related to load, please find out which load causes this problem and try to disconnect it.

    (2) If it is related to inverter, pls contact Growatt Service Team for further solutions.

Analysis:

    When AC output voltage reaches 280V and lasts for 200ms. It will report the fault.

Test Method:

    Just connect the inverter to battery bank, Switch on the inverter, if 06 still occurs, it means DC-AC circuit has the trouble.

Solution：

    (1) Please troubleshoot AC cable between the inverter and load, if 06 fault will disappear after disconnecting all loads, the cable may be too thin and transmission distance is too far.

    (2) Please try to contact Growatt Service Team for further solutions.

Analysis：

    There are 2 conditions that may trigger the fault:

        a. Load power has been greater than 112% and lower than 150% and lasted for 10s

        b. Load power has been greater than 150% and lasted for 2s

Test Method：

    (1) Try to disconnect the load from inverter, then observe if inverter has normal AC output 230V and no 07 fault again.    

    (2) If still abnormal, most of time it is caused by control board.

Solution：

    Please troubleshoot your load if it is related to load; please contact Growatt Service Team for further solutions if it is related to the inverter hardware.

Test Method：

    (1) Try to restart the inverter.

    (2) Try to upgrade special firmware for 08 fault. You can request it from Growatt.

    (3) After the upgrading, if 08 fault still occurs frequently like once several hours, most probably mainbard or control board has some trouble. And please try to contact Growatt Service Team for further solutions.

Analysis：

When BUS voltage exeeds 400V and lasts for 30s. It will report the fault. Most of time, it is caused by burnt MOSFETs or MOSFET related circuit.

Test Method：

Just connect battery into the inverter. Don’t connect Utility input and PV input into the inverter. If the inverter still shows “09 Error” , it means there is something wrong with DC-DC circuit on mainboard.

Solution：

For common customer, suggest replacing mainboard
For professional customer, suggest delivering some mosfets or optocouplers to them and try to repair it.

Analysis：

Lighting strike or utility input surge may damage MOV board. So replacing MOV board may solve the issue.

Test Method：

Try to disconnect all loads from inverter. Then observe if 51 fault will disappear.
Take out MOV board from the inverter. The MOV board is connected to utility input wires in parallel.

Solution：

Replace MOV board.

Analysis：

Most of time, because of heavy load, battery can’t supply enough power for load and it will report 52 fault .

Test Method：

    (1) Restart the battery and inverter

    (2) Try to disconnect all loads from inverter. Then observe if it is normal. If YES, it may be caused by load.

Solution：

    (1) Most of time, because of heavy load, battery can’t supply enough power for load and cause this fault. Try to change battery connection type. Like ARK battery, try to divide them into 2 groups in parallel.

Analysis：

Incorrect charging current on the 2nd option, the 5th option or broken fuse on mainboard,

Test Method：

    (1) Switch off battery DC breaker, test the actual battery voltage via multimeter.

    (2) if battery voltage is normal: Please confirm the battery type, for lithium-ion battery, please check 2nd and 5th option on inverter. Too large charging current on 2nd option will cause BMS protection on battery so that it will shut down the mosfet inside the battery, then battery connection is open. For lithium-ion battery, ONLY US2 or Li can be used. If lead acid battery, in usual, charging current is 0.2-0.3C (C means battery capacity)

Solution：

    Check the battery type and battery settings on the inverter, if all are good, please contact Growatt Service Team for further solutions.

Analysis：

    The inverter will alarm about 81 fault when in parallel mode, host can’t be detected for more than 8 seconds.

Test Method：

    (1) Firstly, check if the parallel cable is connected sufficiently and restart the inverter, and see if it can become normal.

    (2) Secondly, after the check of the parallel cable, if still abnormal, try to replace the parallel cable.

    (3) Thirdly, if all the above methods can’t solve the problem, try to make inverters run separately, and then observe if 81 fault will disappear. If it won’t, try to replace parallel board inside the inverter.

Solution：

    Try to swap parallel cables or parallel boards using a normal inverter, and then you will directly know which part has the malfunction.

Analysis：

    Maybe it’s related to the fan itself, or loose connection of the fan connector.

Test Method：

    Open the inverter and check whether the fan is working properly or not.

Solution：

    (1) If fans are working in good condition, you can upgrade 01warning firmware to clear it.

    (2) If fans are not working well, you can try to reinstall the fan connector or just try to replace the faulty fan.

Analysis：

    Something wrong with temperature sensors or something wrong with temperature sampling circuit.

Test Method：

    Check 2 temperature sensors on MPPT board and mainboard. Try to swap good temperature sensors from normal inverter, and then observe if it will disappear.

Solution：

    (1) You can replace 2 temperature sensors on MPPT board and mainboard.

    (2) You can also contact Growatt Service Team for further solutions.

Analysis：

    (1) Incorrect settings for lead acid battery or lithium-ion battery.

    (2) Battery voltage sample circuit may have something wrong.

Test Method：

    Method 1:

    For lithium-ion battery, please confirm if lithium-ion battery can communicate with inverter. if the inverter is communicating with battery normally and it has 03warning, try to contact battery manufacturer and upgrade battery. If battery brand is not in the compatability list, please request the firmware with US2 option from Growatt. ( You can set US2 on 5th option, less than 30A for single battery on 2nd option)

    Method 2：

    (1) Only connect battery to inverter( don’t connect utility, PV system and load )

    (2) Press UP an Down at the same time for 3 seconds and type 111 , then press Enter.

    (3) Select battery page , S means reduce the voltage, A means increase the voltage.

    (4) For example, LCD displays 53V and multimeter displays 50V, then type 3V on S state. And press Enter to save it.

    (5) For lead acid battery, please check 19th, 20th option on LCD. The issue may be caused by too high bulk charging voltage or floating voltage

Solution：

    (1) Based on battery type, if lead acid battery, adjust 19th, 20th option. If lithium-ion battery, try to upgrade battery or inverter.

What if you have excluded above all, you may contact Growatt Service Team for further solutions.

Analysis：

    04 warning means low battery. When battery voltage is lower than 44V, it will report this warning

Method：

    (1) Please confirm the battery type, lead acid battery or lithium-ion battery.

    (2) Disconnect battery breaker, test the real battery voltage, and compare to battery voltage on LCD. If the voltage difference is large, try to adjust to the battery voltage based on the procedures below

Solution：

    Please refer to Warning 03’s solution.

Analysis：

Warning 20 means BMS communication error.

Method：

    Replace the BMS cable, or check with Growatt whether your battery has been approved and in the compatibility list.

Solution：

    If the battery was not purchased from Growatt or not in compatibility list, please try to set the battery type as US2 in the 05 setting option and let it work without BMS communication.

Analysis：

    The machine has no mains connection.

Solution:

    Check whether the wiring between the mains and the machine is correct, and whether the wiring itself is reliable.

Analysis:

    The energy storage machine sets the mains voltage and frequency according to the safety regulations of different countries and regions. When the connected mains voltage/frequency exceeds the rated range under the set safety regulations, this fault will occur.

Solution:

    Check whether the mains voltage/frequency exceeds the upper limit of the rated range or is lower than the lower limit of the rated range.

Analysis：

    Different models of energy storage machines have their matching firmware versions. This fault occurs when the firmware programmed by the machine does not match.

Solution：

    Check whether the software of the energy storage machine is the correct version, if not, you need to burn the correct code to solve the problem.

Analysis：

    In lithium battery mode, the machine needs to communicate with the battery through the network cable. When the battery-battery communication fails, the machine will display “BMS COM Fault”.

Solution：

    Check whether the wiring between the energy storage machine and the battery is normal.

Analysis：

    In lead-acid mode, the upper and lower limits of the battery voltage need to be set. When the battery voltage exceeds the range, this fault occurs.

Solution：

    Solve the problem by setting the battery voltage range of the energy storage machine.

Analysis:

    The positive and negative terminals of the battery need to correspond to the terminals marked on the machine, otherwise there will be a fault of reverse battery connection.

Solution：

    Check whether the positive and negative terminals of the battery are reversed.

Analysis：

    This fault occurs when the communication between the machine and the battery is good in the lithium battery mode but the battery is not connected.

Solution：

    Check whether the positive and negative terminals of the battery are firmly connected to the machine.

Analysis：

    Three cameras and single cameras under some safety regulations need to be connected to the electricity meter when they work normally, and this fault occurs when the electricity meter is not connected.

Solution：

    Check whether the meter is connected or whether the communication between the meter and the energy storage machine is normal.

Analysis：

    In lead-acid mode, the energy storage machine needs to be connected to the NTC terminal at the corresponding terminal block. This fault will occur if the NTC is not connected.

Solution:

    Check whether the NTC terminal is properly connected with the energy storage machine.

That is the power scheduling function. Customers can perform power scheduling through the corresponding dialing code of the DRMS fixture to limit the input and output power of the grid.

The user can connect the double meter to the energy storage machine according to the usage requirements to monitor the power of the inverter and the energy storage machine respectively. The specific setting is to set “Mode change➡Sensor➡Meter” through the LCD, one meter is connected to the “CT1/METER1” port, and the other meter is connected to the “485-1” or “485-2” port.

Analysis：

    The energy storage machines under different MODELs have their output power upper limit, and this fault occurs when the machine output is overloaded.

Solution：

    Check whether the load of the energy storage machine exceeds the upper limit, and reduce the load to the rated range of the machine to solve the problem.

Analysis: 

    Normally, the DC voltage of Growatt single phase inverter could up to 550V, for three-phase inverter, it is 1100V. When the string voltage exceeds this value, the inverter will report that the PV input voltage is too high.

Solution: 

    Check each string to ensure that the total PVs’ open-circuit voltage of the string is lower than the highest value of the inverter. At the same time, the influence of the ambient temperature on the component voltage needs to be considered.

Analysis: 

    All of Growatt’s on-grid inverters will take the insulation resistance test between panels to ground before starting up. If the positive and negative poles of the string are short-circuited to the ground, it will damage the inverter. Therefore, when the “PV insulation resistance is too low” occurs in the inverter, it needs to be dealt with in time. You can use a multimeter to measure whether the resistance of the positive and negative pairs of the string is lower than 50KΩ. If it is lower, which means that there is leakage in the modified line. Or use a multimeter to measure the voltage of the positive and negative poles of the string to the ground. If it is purely at a certain voltage value, it also means that the line is purely leaking.

Solution: 

    Check out the string with leakage current and make rectification. If there is no problem with the wiring, consider replacing the inverter.

Analysis: 

    All Growatt on-grid inverters are designed in accordance with the local power grid safety requirements, but when the grid fluctuates, the grid voltage will change. At this time, if the voltage is higher than the inverter’s working range, the inverter will be disconnected from the grid and prompt “AC voltage out of range”. For example, as China CQC certification, the inverter’s AC voltage range is 195V-253V; if the grid voltage suddenly exceeds this value, the device will be disconnected from the grid due to excessive voltage.

Solution: 

    You can widen the voltage range through the inverter setting menu; or use the inverter debugging tool software Shinebus to modify the voltage protection parameters. You can also use the ShinePhone, ShineTools APP or web version ShineServer platform to enter the parameter setting interface to adjust the voltage range of the device.

Analysis: 

    The fault is mainly because the AC voltage difference between the zero line and the ground line is higher than 20V during the inverter self-check. The main reason is that the N cable on the grid side is connected in a virtual way, or the ground wire is not connected properly.

Solution: 

    Check whether the wiring is abnormal, and rectify the faulty point. Or use the debugging tool software Shinebus to disable this function.

Analysis: 

    The grid frequency is out of range mainly because the inverter needs to detect the frequency of the grid at all times for phase locking. If the grid suddenly changes, the frequency will fluctuate. At this time, the inverter will disconnect with the grid due to frequency jitter.

Solution: 

    You can widen the frequency range through the inverter setting menu; or use the inverter debugging tool software Shinebus to modify the frequency protection parameters. You can also use the mobile APP or web version monitoring platform and enter the parameter setting interface to widen the frequency range of the device.

Analysis: 

    Normally, the inverter’s voltage and current output waveforms are in pure AC form. If the AC waveform is doped with DC waveforms due to device fault, the inverter will report the fault.

Solution: 

    You can set parameters through the inverter debugging tool software Shinebus to adjust the condition of the DC component; if it still does not work, you need to consider replacing the inverter.

Analysis: 

    The relay fault reported by the inverter is divided into hardware fault and software fault. If the fault is reported after the inverter is connected to AC and DC power, it is generally a hardware problem. If the relay is reported by the inverter after the inverter counts down three times, it is usually a parameter or grid problem, which needs to be dealt with according to the actual situation.

Solution: 

    If the fault is reported when the power is turned on, it can only be handled by changing the machine. If it is reported after self-inspection 3, you can contact our after-sales staff for communication and processing.

Analysis: 

    If the temperature reported by the inverter is too high, it is necessary to check whether the installation location of the inverter is ventilated and whether the fan is rotating normally. If it is not caused by the external factors, please contact our after-sales service, check the log of the inverter, and find the reasons of the high temperature.

Solution: 

    For external reasons, make appropriate rectifications. If it is an internal reason, please follow the guidelines of our after-sales engineers.

Analysis: 

    This fault means that the bus capacitor voltage inside the inverter is abnormal, and the positive and negative deviations are too high. When this problem occurs, you need to check whether the string voltage is too high and whether the string is grounded.

Solution: 

    First check whether there is a problem with the wiring, if it caused by the wiring, please rectify and restart the divice. If the wiring is normal and the device still reports the fault, please contact our after-sales staff.

Analysis: 

    When this fault occurs, it is necessary to check whether it is a new device fault or a fault reported after using for a period of time; general new device faults may be caused by vibration of the machine during transportation, resulting in the looseness of the control board inside the inverter. If it has been used for a period of time, it is possible that the firmware of the control board is missing.

Solution:

    For the new device, you can ask a technician to disassemble the machine and check the PCB board inside the inverter to see if there is any abnormality such as looseness. If the fault occured during the using, please contact our after-sales staff.

Analysis: 

    Growatt inverter has SPD on the AC & DC sides. If the machine is subjected to surge or lightning strike, it will play a protective role, and then the lightning protection device of the machine will fail and give an alarm.

Solution: 

    The failure of the SPD will not affect the power generation of the inverter, but it will not benefit the long-term work of the inverter. Therefore, when the fault occurs, you need to contact our after-sales engineer to deal with it.

Analysis: 

    When the inverter reports this fault, it is necessary to check whether the cooling fan on the back of the inverter is rotating. If it does not rotate, you can use external force to rotate the fan blades to see if there is any resistance. If there is, it means that the fan is stuck inside or there is a problem with the bearing, and the fan needs to be replaced.

Solution: 

    As long as it is determined that it is a fan problem, please replace it directly. If all the fans have been replaced and it still doesn’t work, there may be a problem with the power supply of the fans inside the machine, please contact our after-sales staff to deal with it.

1)Log in the OSS platform->Monitor->Device List->Click the setting button or double click the target device to set

2)Check “I have read and agree to the disclaimer” and click confirm.

3)Set inverter

Method 1: Via the Device Details

1)Log in the OSS platform->Monitor->Device List->Double click the target device to enter the details.

2)Select the target device->Confirm delete

Method 2: Via the Plant Details

1)Log in the OSS platform->Monitor->Plant List->Double click the target plant to enter the details.

2)Plant Details->Device List->Select the target device to delete

3) Confirm to delete.

1)Login the OSS platform->Monitor->End User->Choose the target user to edit

1)Login the OSS platform->Monitor->End User->Double click the target user to enter the details

2)User Detail->Existing browsing users->Click to add

1)Login the OSS platform->Monitor->Plant List->Plant Management->Double click the target plant to enter the details page

2)Plant Details->Device List->Storage inverter->Select the target device to set

1)Login the OSS platform->Monitor->Plant List->Click the target plant to edit or double click to enter the details.

2)Plant details->More plant information->Click to edit

Method1: Setting via the Device List

1)Login the OSS platform->Monitor->Device List-> double click the target device to enter the details.

2)Device Detail->Device information overview->Click the RF pairing or RF equipment

Method2: Setting via Plant List->Plant Management List

1)Login the OSS platform->Monitor->Plant List->Double click the target plant to enter the details.

2)Plant Detail->Device List->Select the target datalogger and click the set button

Method 1: Via the Device Details

1)Login the OSS platform->Monitor->Device List->Double click the target device to enter the details.

2)Device Details-> Historical Data

Method 2: Jump to the ShineServer Platform

1)Login the OSS platform->Monitor->Device List->Click to view the device

2) Enter to ShineServer Platform->Dashboard Device List->History Data

Login the ShinePhone APP->Plant Management->Plant List->Plant Detail->Edit Plant/Add Datalogger/View the Plant

Login the ShinePhone APP->Device List->Device Detail->Setting/Edit/Delete/View Device

Login the ShinePhone APP->User Management/ User List->User Detail->Edit/Reset password/View the user