Huawei SUN2000-20KTL-M2 Quick Guide

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SUN2000-(8KTL-20KTL)-M2

Quick Guide

HUAWEI TECHNOLOGIES CO., LTD.

Issue: 03

Part Number: 31500BCA

Date: 2020-07-10

Table of Contents

Other manuals for Huawei SUN2000-20KTL-M2

User Manual136 pages

Questions and Answers:

L
Lawrence JensenSep 10, 2025
How to resolve High String Input Voltage on Huawei SUN2000-20KTL-M2 Inverter?
- C
  courtney51Sep 10, 2025
  If your Huawei Inverter is showing a 'High String Input Voltage' error, it means that the PV array is not properly configured, and too many PV modules are connected in series, causing the open-circuit voltage to exceed the inverter's maximum operating voltage. To fix this, reduce the number of PV modules connected in series until the PV string's open-circuit voltage is within the acceptable range. Once correctly configured, the alarm should disappear.
B
Brittany McbrideAug 25, 2025
What to do if Huawei SUN2000-20KTL-M2 shows Grid Loss?
- K
  Katherine RobersonAug 25, 2025
  If your Huawei Inverter indicates a 'Grid Loss' error, it means the power grid might be experiencing an outage, or the AC power cable could be disconnected, or the AC circuit breaker is OFF. To resolve this, first, verify that the AC voltage is normal. Second, ensure that the AC power cable is properly connected and the AC switch is in the ON position.
D
dorisvasquezAug 25, 2025
How to fix Low Insulation Resistance on Huawei Inverter?
- C
  christinaleonAug 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.
K
Kaitlyn HannaAug 26, 2025
What to do if my Huawei Inverter shows a Grid Failure?
- F
  frank85Aug 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.
M
mollydurhamAug 27, 2025
How to fix String Reversed error on Huawei SUN2000-20KTL-M2?
- T
  theresa62Aug 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.
J
jared16Sep 6, 2025
What does Abnormal Residual Current mean on my Huawei SUN2000-20KTL-M2 and how do I troubleshoot it?
- L
  Luke MeyerSep 6, 2025
  If your Huawei Inverter is showing an 'Abnormal Residual Current' error, it means the insulation impedance of the input side to PE has decreased during operation. If the alarm occurs occasionally, the external power cable 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 of the PV string to ground is excessively low.
M
michaelkochSep 4, 2025
What does Output DC Component Overhigh mean on my Huawei Inverter and how to resolve it?
- S
  Stephanie JacksonSep 4, 2025
  If your Huawei Inverter displays an 'Output DC Component Overhigh' error, it indicates that the DC component of the output current exceeds the specified upper threshold. The SUN2000 detects its external working conditions in real time and automatically recovers after the fault is rectified. If the alarm occurs frequently, contact your dealer or Huawei technical support.
S
Sarah BradySep 5, 2025
What causes Transient AC Overvoltage on a Huawei SUN2000-20KTL-M2 Inverter and how can I fix it?
- A
  ashley31Sep 5, 2025
  If your Huawei Inverter reports a 'Transient AC Overvoltage' error, it means the inverter has detected that the phase voltage exceeds the transient AC overvoltage protection threshold. 1. Check if the grid connection voltage exceeds the upper threshold. If yes, contact the local power operator. 2. If you have confirmed that the grid-tied voltage exceeds the upper threshold and have obtained the consent of the local power operator, modify the overvoltage protection threshold through the mobile phone app, SmartLogger, or NMS. 3. Check whether the peak power grid voltage exceeds the upper threshold.
J
Jose MorrisAug 31, 2025
What does Unbalanced Grid Voltage mean on my Huawei Inverter?
- K
  kgreeneSep 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.
M
Melissa WillisAug 29, 2025
What causes String Current Backfeed on a Huawei SUN2000-20KTL-M2 Inverter and how to resolve it?
- J
  Julia GonzalezAug 29, 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.

Huawei SUN2000-20KTL-M2 Specifications

General

Model	SUN2000-20KTL-M2
Type	String Inverter
Max. efficiency	98.6%
European efficiency	98.3%
Max. input voltage	1100 V
Max. input current per MPPT	26 A
Number of MPPTs	2
Rated output power	20, 000 W
Start Voltage	200 V
MPPT Voltage Range	200 V - 1000 V
Max. AC Power	22, 000 VA
Output Frequency	50 Hz / 60 Hz
Dimensions (W x H x D)	525 x 470 x 262 mm
Weight	25 kg
Operating Temperature Range	-25°C to +60°C
Cooling Method	Natural Convection
Protection Degree	IP65
Rated AC Voltage	230 V / 400 V
Max. Input Power	30, 000 W
Max. Output Power	22, 000 W
Rated Output Voltage	230 V / 400 V

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