Huawei SUN2000-2KTL-L1 User Manual (English)

Questions and Answers:

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Darin HoffmanAug 31, 2025
What does Abnormal Residual Current mean on Huawei Inverter?
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  Rebecca PorterAug 31, 2025
  If your Huawei Inverter is showing an 'Abnormal Residual Current' error, it indicates that the insulation impedance on the input side to PE is decreasing during operation. If the alarm occurs occasionally, the external circuit may be temporarily abnormal and the SUN2000 automatically recovers after the fault is rectified. If the alarm occurs frequently or persists, check whether the impedance between the PV string and the ground is too low.
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dalton50Sep 9, 2025
What to do if Huawei Audio & Video Accessories show DC Arc Fault?
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  rebeccabestSep 9, 2025
  If your Huawei Audio & Video Accessories indicates a DC Arc Fault, it's likely due to arcing or poor contact in the PV string power cables. You should check the string cables for signs of arcing or poor connections.
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annealexanderAug 29, 2025
Why is my Huawei Inverter showing High String Input Voltage?
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  Carly MedinaAug 29, 2025
  A 'High String Input Voltage' error on your Huawei Inverter means the PV array isn't configured correctly. Too many PV modules are in series, causing the open-circuit voltage to exceed the SUN2000's maximum operating voltage. Check the serial connection configuration of the PV string and ensure the PV string open-circuit voltage doesn't exceed the SUN2000's maximum operating voltage. The alarm should disappear after correcting the PV array configuration.
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psotoSep 12, 2025
What to do if Huawei Audio & Video Accessories show Grid Overvoltage?
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  Tanner SchroederSep 12, 2025
  If your Huawei Audio & Video Accessories is showing a grid overvoltage error, here are a few things to check: 1. If the alarm occurs occasionally, the power grid may be temporarily abnormal, and the system should recover automatically. 2. If it occurs frequently, check if the power grid voltage is within the allowed range. If not, contact your local power operator. If it is, you can modify the grid overvoltage protection threshold using the mobile app, SmartLogger, or NMS with the consent of the local power operator. 3. Also, check if the peak voltage of the power grid is too high. If the issue persists, contact the power operator.
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Mary HarrisSep 12, 2025
What to do if Huawei SUN2000-2KTL-L1 Audio & Video Accessories show Grid Undervoltage?
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  katherineaustinSep 12, 2025
  If your Huawei Audio & Video Accessories is showing a grid undervoltage error, here are a few things to check: 1. If the alarm occurs occasionally, the power grid may be temporarily abnormal, and the system should recover automatically. 2. If it occurs frequently, check if the power grid voltage is within the allowed range. If not, contact your local power operator. If it is, you can modify the grid undervoltage protection threshold using the mobile app, SmartLogger, or NMS with the consent of the local power operator. 3. If the fault persists, check the connection between the AC switch and the output power cable.
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Corey WalkerSep 14, 2025
What to do if Huawei SUN2000-2KTL-L1 Audio & Video Accessories show Abnormal Residual Current?
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  perkinsleslieSep 14, 2025
  If your Huawei Audio & Video Accessories is showing an abnormal residual current, it indicates that the insulation impedance on the input side to PE is decreasing. If the alarm occurs occasionally, the external circuit may be temporarily abnormal, and the SUN2000 will automatically recover after the fault is rectified. If the alarm occurs frequently or persists, check whether the impedance between the PV string and the ground is too low.
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Ashley DurhamAug 27, 2025
Why does Huawei Inverter show Grid Overvoltage?
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  cookjeffreyAug 27, 2025
  A 'Grid Overvoltage' alarm on your Huawei Inverter means the grid voltage is too high. Here's what to do: 1. If the alarm is occasional, the power grid might be temporarily abnormal. The SUN2000 should recover automatically. 2. If the alarm occurs frequently, verify that the power grid voltage is within the allowed range. If it's not, contact the local power operator. If it is, adjust the grid overvoltage protection threshold using the mobile app, SmartLogger, or NMS, with the consent of the power operator. 3. Check for peak voltage issues on the power grid. If the problem continues, contact the power operator.
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Justin MooreAug 27, 2025
What causes Grid Undervoltage on Huawei Inverter?
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  Patricia AndersonAug 27, 2025
  A 'Grid Undervoltage' error on your Huawei Inverter means the grid voltage is too low. Here's how to address it: 1. If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 will automatically recover when the grid returns to normal. 2. If it happens frequently, check if the grid voltage is within the allowed range. If not, contact your local power operator. If it is, modify the grid undervoltage protection threshold via the mobile app, SmartLogger, or NMS with the power operator's consent. 3. If the issue persists, check the connection between the AC switch and the output power cable.
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Jessica PottsAug 26, 2025
How to fix Low Insulation Resistance on Huawei Inverter?
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  cindymurphyAug 26, 2025
  A 'Low Insulation Resistance' error on your Huawei Inverter indicates a short circuit between the PV array and the ground, or damp ambient air causing poor insulation. Here's what you should do: 1. Check the output impedance of the PV array to ground. Rectify any short circuits or insulation issues. 2. Ensure the PE cable of the SUN2000 is correctly connected. 3. If the impedance is lower than the specified protection threshold in rainy and cloudy days, set Insulation resistance protection using the mobile app, SmartLogger, or NMS.
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Scott HudsonAug 25, 2025
What to do if Huawei Inverter says String Reversed?
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  obrownAug 26, 2025
  If you see a 'String Reversed' error on your Huawei Inverter, it means a PV string is connected with reversed polarity. 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 correct the PV string polarity.

Huawei SUN2000-2KTL-L1 Specifications

General

Nominal AC grid frequency	50 Hz / 60 Hz
Max. input voltage	600 V
Cooling	Natural convection
Protection degree	IP65
Operating temperature range	-25°C to +60°C