Huawei SUN2000-10KTL-M2

Questions and Answers

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Roger AdamsAug 31, 2025
What does Unbalanced Grid Voltage mean on my Huawei SUN2000-10KTL-M2 Inverter?
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  Gregory FordSep 1, 2025
  If your Huawei Inverter is showing an 'Unbalanced Grid Voltage' error, it means that the difference between grid phase voltages exceeds the upper threshold. Here's what to do: 1. If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 automatically recovers after detecting that the power grid becomes normal. 2. If the alarm occurs frequently, check whether the grid voltage is within the acceptable range. If no, contact the local power operator. 3. If the fault persists for a long time, check the connection between the AC switch and the output power cable.
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Shannon HancockSep 12, 2025
What causes String Reverse Connection on Huawei SUN2000-10KTL-M2?
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  Daniel NguyenSep 12, 2025
  If your Huawei Inverter reports a 'String Reverse Connection' error, it means the PV string polarity is reversed. To correct this, check if the PV string is reversely connected to the SUN2000. If it is, wait until the PV string current decreases below 0.5 A, set the DC SWITCH to OFF, and then adjust the PV string polarity.
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Arthur FloresAug 29, 2025
What causes String Current Backfeed on a Huawei SUN2000-10KTL-M2 Inverter and how to resolve it?
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  Timothy CookAug 30, 2025
  If your Huawei Inverter reports 'String Current Backfeed,' it means that too few PV modules are connected in series, causing the end voltage to be lower than other PV strings. To resolve this: 1. Check if the number of PV modules connected in series is less than that of other PV strings. If so, wait until the PV string current drops below 0.5 A, set the DC SWITCH to OFF, and adjust the number of PV modules. 2. Check if the PV string is shaded. 3. Check if the open-circuit voltage of the PV string is normal.
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Jimmy BarnettDec 1, 2025
What does Grid Overvoltage mean on my Huawei SUN2000-10KTL-M2 and how can I fix it?
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  carriewallerDec 1, 2025
  If your Huawei SUN2000 Inverter is showing a 'Grid Overvoltage' error, it means the power grid voltage is beyond the upper threshold or the overvoltage duration exceeds the value specified by HVRT. Here's what you can do: 1. If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 automatically recovers after detecting that the power grid becomes normal. 2. If the alarm occurs frequently, check whether the grid voltage is within the acceptable range. If not, contact the local power operator. If yes, log in to the mobile phone app, SmartLogger, or NMS to modify the grid overvoltage protection threshold with the consent of the local power operator. 3. Check whether the peak voltage of the power grid is too high. If the fault persists and cannot be rectifi...
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Daniel PriceSep 12, 2025
What to do for String Current Backfeed on Huawei SUN2000-10KTL-M2?
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  Thomas ThompsonSep 12, 2025
  If your Huawei Inverter is showing a 'String Current Backfeed' error, it means that the number of PV modules connected in series to this PV string is insufficient, causing the end voltage to be lower than that of other strings. To resolve this: 1. Check if the number of PV modules connected in series to this PV string is less than the number of PV modules connected in series to the other PV strings connected in parallel with this PV string. If so, wait until the PV string current decreases below 0.5 A, set DC SWITCH to OFF, and adjust the number of PV modules in the PV string. 2. Check if the PV string is shaded. 3. Check if the open-circuit voltage of the PV string is normal.
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Christopher RaySep 16, 2025
What does Abnormal Residual Current mean on Huawei SUN2000-10KTL-M2?
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  Diane DyerSep 16, 2025
  If your Huawei Inverter is showing an 'Abnormal Residual Current' error, it indicates that the input-to-ground insulation impedance has decreased during the inverter operation. To address this: 1. If the alarm occurs accidentally, the external power cable may be temporarily abnormal. The inverter will automatically recover once the fault is rectified. 2. If the alarm occurs frequently or persists, check that the impedance between the PV string and ground is not below the lower threshold.
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Steven RodriguezSep 23, 2025
How to troubleshoot Abnormal PV Module Configuration on Huawei SUN2000-10KTL-M2?
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  Alan BowersSep 23, 2025
  If your Huawei Inverter reports 'Abnormal PV Module Configuration,' it means the PV module configuration doesn't meet requirements, or the PV module output is reversely connected or short-circuited. Check whether the total number of PV modules, the number of PV modules in a string, and the number of PV strings meet requirements, and verify that the PV module output isn't reversely connected.
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Dawn FisherAug 27, 2025
How to fix String Reversed error on Huawei SUN2000-10KTL-M2 Inverter?
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  Sarah SantiagoAug 27, 2025
  If your Huawei Inverter displays a 'String Reversed' error, it means the PV string is reversely connected. To fix this, wait until night when solar irradiance declines and the PV string current drops below 0.5 A. Then, set the DC SWITCH to the OFF position and correct the string polarity.
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Walter PetersonAug 26, 2025
What to do if my Huawei Inverter shows a Grid Failure?
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  Elizabeth JamesAug 26, 2025
  If your Huawei Inverter reports a grid failure, it means that the power grid has experienced an outage, the AC circuit is disconnected, or the AC switch is off. To resolve this, first, check the AC voltage. Second, check whether the AC circuit is disconnected or the AC switch is off.
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Hannah RobinsonAug 25, 2025
How to fix Low Insulation Resistance on Huawei SUN2000-10KTL-M2?
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  michael48Aug 26, 2025
  If your Huawei Inverter displays a 'Low Insulation Resistance' error, it could be due to the PV array being short-circuited to ground or the power cable not being well insulated, especially in a moist environment. Here's what you should do: * Check the impedance between the PV array output and PE, and eliminate any short circuits or points of poor insulation. * Ensure the PE cable for the inverter is correctly connected. * If you're certain the impedance is less than the preset protection threshold in cloudy or rainy conditions, you can log in to the mobile app, SmartLogger, or NMS to reset the insulation impedance protection threshold.