Huawei SUN2000-28KTL - User Manual

Other manuals for Huawei SUN2000-28KTL

Questions and Answers

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samantha62Sep 13, 2025
How to troubleshoot Low Array Insulation Resistance on a Huawei SUN2000-28KTL Inverter?
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  Justin LeeSep 13, 2025
  If your Huawei Inverter displays 'Low Array Insulation Resistance', it means the insulation resistance against the ground for PV arrays is less than the minimum value. You should: 1. Check the insulation resistance against the ground for the outputs of PV arrays. If a short circuit occurs, rectify the fault. 2. If the insulation resistance against the ground is less than the default value in a rainy environment, set the insulation resistance threshold.
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Joy RileySep 12, 2025
What causes Invert Module Fault in Huawei Inverter?
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  cobbjordanSep 12, 2025
  If your Huawei Inverter displays 'Invert Module Fault', it indicates a protection activation for the inversion circuit inside the SUN2000 due to abnormal external conditions. The SUN2000 detects its external working conditions in real time, and therefore the SUN2000 automatically recovers to the normal operating status after the fault is rectified. If the Reason ID is 20, check whether the inverter output cable is short-circuit.
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bergkennethSep 12, 2025
What to do if Huawei SUN2000-28KTL Inverter shows System Fault?
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  kellysolomonSep 12, 2025
  If your Huawei SUN2000 Inverter reports a 'System Fault', it indicates an unrecoverable fault within the inverter's internal circuitry. To attempt a fix, flip the DC switch on the SUN2000 to the OFF position, wait for 5 minutes, and then flip the DC switch back to the ON position. Check if the fault clears.
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Judy RussellSep 12, 2025
Why does my Huawei SUN2000-28KTL Inverter show Frequency Abnormal?
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  Joe JonesSep 12, 2025
  If your Huawei Inverter displays a 'Frequency Abnormal' error, it means that the actual frequency of the grid is higher than the local grid standards requirements. If this occurs accidentally, the SUN2000 will automatically recover to normal operation once the grid stabilizes. However, if the alarm repeats, verify that the grid frequency is within the acceptable range. If it is not, contact your local power operator. If the frequency is within range, you may need to change the power grid overfrequency and underfrequency protection points after obtaining approval from the local power operator.
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Rebekah DavisSep 9, 2025
What to do if Huawei Inverter shows Grid Voltage Abnormal?
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  Timothy BrownSep 9, 2025
  If your Huawei Inverter shows a 'Grid Voltage Abnormal' error, it indicates that the voltage of the power grid is beyond the acceptable range. If this occurs accidentally, the SUN2000 will automatically recover to normal operation once the grid stabilizes. However, if the alarm repeats, verify that the grid voltage is within the acceptable range. If it is not, contact your local power operator. If the voltage is within range, you may need to change the power grid overvoltage and undervoltage protection points after getting approval from the local power operator.
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Sheila RosarioSep 8, 2025
Why is my Huawei Inverter showing Cabinet Overtemperature?
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  Tyler NelsonSep 8, 2025
  If your Huawei SUN2000 Inverter is showing a Cabinet Overtemperature warning, check the ventilation and ambient temperature around the installation location. If ventilation is poor or the temperature is too high, improve the ventilation and heat dissipation.
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coxhelenAug 23, 2025
How to fix DC Over Voltage error on Huawei Inverter?
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  Jared Terry MDAug 23, 2025
  The Huawei Inverter might show a DC Over Voltage error if too many PV modules are connected in series. This makes the PV string's open-circuit voltage higher than the inverter's maximum operating voltage. To fix this, reduce the number of PV modules connected in series until the PV string output voltage is within the specified range for the Huawei Inverter. After adjusting, the inverter should work correctly.
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Brett RomanSep 7, 2025
How to troubleshoot 'String 1-6 Reverse' on Huawei Inverter?
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  Valerie BrownSep 7, 2025
  If your Huawei Inverter SUN2000 reports 'String 1-6 Reverse', first check if the PV string is connected in reverse. If it is, wait until night when solar irradiance is low and the PV string voltage drops below 60V DC. Then, set the DC SWITCH to OFF and correct the PV string connection. Also, check if the number of PV modules connected in series is too small. If so, increase the number of PV modules connected in series to the SUN2000.
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matthewsmithSep 6, 2025
What to do if Huawei SUN2000-28KTL reports Abnormal Invert Circuit?
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  Connie GreenSep 6, 2025
  If your Huawei SUN2000 Inverter displays an Abnormal Invert Circuit error, it could be due to several reasons. If the cause ID is 13, 14, or 16, the SUN2000 monitors its external working conditions in real time and automatically reverts to normal operating status after the fault is rectified. If the Reason ID is 20, check whether the SUN2000 output cables are short-circuited and rectify any fault.
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Angela ChanSep 5, 2025
Why does my Huawei Inverter show Abnormal Grid Voltage?
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  Lauren MurphySep 5, 2025
  If your Huawei Inverter is showing an Abnormal Grid Voltage error, it could be due to a couple of reasons. If the alarm seems to be a one-time occurrence (Cause ID = 4), it might be due to a temporary issue with the power grid, and the SUN2000 should automatically return to normal operation once the grid stabilizes. However, if the grid-tied point voltage is consistently too high (Cause ID = 16/19/26), you should contact your local power operator to investigate the grid conditions.

Huawei SUN2000-28KTL Specifications

General

Model	SUN2000-28KTL
Rated Output Power	28 kW
Max. Input Voltage	1100 V
MPPT Voltage Range	200 V - 1000 V
Number of MPPT Trackers	2
Max. Input Current per MPPT	26 A
Rated AC Voltage	400 V
Rated Output Voltage	400 V
Output Frequency	50 Hz / 60 Hz
Max. Efficiency	98.6%
Protection Degree	IP65
DC Connection	MC4
Maximum Output Power	28 kW
Power Factor Adjustment Range	0.8 leading ... 0.8 lagging
Operating Temperature Range	-25 °C to 60°C
Cooling	Natural cooling