Huawei SUN2000-20KTL-M2 User Manual (English)

Other manuals for Huawei SUN2000-20KTL-M2

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

Summary

About This Document

Purpose

Describes the SUN2000 inverter, its installation, electrical connections, commissioning, maintenance, and troubleshooting.

Intended Audience

Lists the target readers for this document, including installers and users.

Symbol Conventions

Explains the meaning of symbols used throughout the document for safety and information.

Safety Information

1.1 Personal Safety

Safety guidelines for personal protection during operations, including precautions against electric shock.

1.2 Electrical Safety

Safety guidelines related to electrical hazards, grounding, and cable connections.

1.3 Environment Requirements

Guidelines for selecting and maintaining a safe operating environment for the equipment.

1.4 Mechanical Safety

Safety precautions for physical handling, mounting, and moving of the equipment.

Moving Heavy Objects

Procedures and precautions for safely moving heavy equipment to prevent injury.

Using Ladders

Guidelines for safe use of ladders during work at heights.

Hoisting and Drilling Safety

Safety procedures for hoisting operations and drilling holes.

Overview

2.1 Product Introduction

Introduces the SUN2000 inverter and its function in converting DC power to AC power.

Network Application

Describes typical grid-tied system configurations and components.

2.2 Appearance

Details the physical components, ports, and indicators of the SUN2000 inverter.

2.3 Label Description

Explains various labels, symbols, and warnings found on the equipment.

2.3.1 Enclosure Labels

Describes symbols and their meanings found on the equipment enclosure.

2.3.2 Product Nameplate

Details the information provided on the product nameplate.

2.4 Working Principles

Explains the operational principles and conceptual diagram of the SUN2000.

2.4.1 Circuit Diagram

Illustrates the conceptual circuit diagram of the SUN2000.

2.4.2 Working Modes

Describes the different operating modes of the SUN2000: Standby, Operating, and Shutdown.

Storage

Installation

4.1 Checking Before Installation

Procedures for checking outer packing materials and inverter model before installation.

4.2 Tools

Lists the tools required for installation, categorized by type.

4.3 Determining the Installation Position

Guidelines for selecting the optimal installation location for the inverter.

4.3.1 Environment Requirements

Specifies environmental conditions for safe and optimal installation.

4.3.2 Space Requirements

Details the necessary space around the unit for installation and heat dissipation.

4.4 Moving an Inverter

Provides instructions for safely moving the inverter during installation.

4.5 Installing the Mounting Bracket

Instructions for installing the mounting bracket for the inverter.

4.5.1 Wall-mounted Installation

Step-by-step guide for wall-mounting the inverter bracket.

4.5.2 Support-mounted Installation

Step-by-step guide for installing the mounting bracket on supports.

Electrical Connections

5.1 Precautions

General safety precautions before making electrical connections.

5.2 Preparing for Installation

Steps to prepare for electrical connections, including cable selection.

5.3 Connecting the PE cable

Instructions for properly connecting the protective earth (PE) cable.

5.4 Connecting the AC Output Power Cable

Detailed steps for connecting the AC output power cable.

5.5 Connecting the DC input power cable

Instructions for safely connecting the DC input power cables.

5.6 (Optional) Installing the Smart Dongle

Steps for installing the Smart Dongle for communication.

5.7 (Optional) Installing the Signal Cable

Information on connecting various signal cables.

5.7.1 Connecting the RS485 Communications Cable (Inverter Cascading)

Guide for connecting RS485 cables for inverter cascading.

5.7.2 Connecting the RS485 Communications Cable (Smart Power Sensor)

Guide for connecting RS485 cables to a Smart Power Sensor.

Commissioning

6.1 Check Before Power-On

Checklist for verifying installation before powering on the system.

6.2 Powering On the System

Step-by-step procedure for powering on the SUN2000 system.

Man-Machine Interaction

7.1 App Commissioning

Instructions for commissioning the system using the mobile app.

7.2 Parameters Settings

Guide to configuring various operational parameters of the SUN2000.

7.2.1 Energy Control

Configuration for controlling the energy output of the PV system.

7.2.2 AFCI

Explanation and configuration of the Arc Fault Circuit Interrupter function.

7.2.3 IPS Check (for Italy CEI0-21 Grid Code Only)

Procedure for performing an IPS test for specific grid codes.

7.3 SmartLogger Networking Scenario

Details on setting up the SmartLogger for network communication.

Maintenance

8.1 System Power-Off

Instructions for safely powering off the system for maintenance.

8.2 Routine Maintenance

Guidelines for performing regular maintenance tasks.

8.3 Troubleshooting

Guidance for diagnosing and resolving common issues and alarms.

Handling the Inverter

9.1 Removing a SUN2000

Steps for safely removing the inverter from its mounting.

9.2 Packing the SUN2000

Guidelines for packing the SUN2000 for transport or storage.

9.3 Disposing of the SUN2000

Instructions for proper disposal of the equipment at its end of life.

Technical Data

10.1 SUN2000 Technical Specifications

Detailed technical specifications for the SUN2000 models.

10.2 Optimizer Technical Specifications

Technical specifications for compatible PV optimizers.

Grid Codes

Table A-1 Grid Codes

Lists supported national and regional grid codes for the SUN2000.

Resetting Password

(Optional) Resetting the WLAN password

Procedure for changing or resetting the WLAN password.

Rapid Shutdown

Locating Insulation Resistance Faults

Acronyms and Abbreviations

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Table of Contents

Other manuals for Huawei SUN2000-20KTL-M2

Questions and Answers:

Huawei SUN2000-20KTL-M2 Specifications

Summary

About This Document

Purpose

Intended Audience

Symbol Conventions

Safety Information

1.1 Personal Safety

1.2 Electrical Safety

1.3 Environment Requirements

1.4 Mechanical Safety

Moving Heavy Objects

Using Ladders

Hoisting and Drilling Safety

Overview

2.1 Product Introduction

Network Application

2.2 Appearance

2.3 Label Description

2.3.1 Enclosure Labels

2.3.2 Product Nameplate

2.4 Working Principles

2.4.1 Circuit Diagram

2.4.2 Working Modes

Storage

Installation

4.1 Checking Before Installation

4.2 Tools

4.3 Determining the Installation Position

4.3.1 Environment Requirements

4.3.2 Space Requirements

4.4 Moving an Inverter

4.5 Installing the Mounting Bracket

4.5.1 Wall-mounted Installation

4.5.2 Support-mounted Installation

Electrical Connections

5.1 Precautions

5.2 Preparing for Installation

5.3 Connecting the PE cable

5.4 Connecting the AC Output Power Cable

5.5 Connecting the DC input power cable

5.6 (Optional) Installing the Smart Dongle

5.7 (Optional) Installing the Signal Cable

5.7.1 Connecting the RS485 Communications Cable (Inverter Cascading)

5.7.2 Connecting the RS485 Communications Cable (Smart Power Sensor)

Commissioning

6.1 Check Before Power-On

6.2 Powering On the System

Man-Machine Interaction

7.1 App Commissioning

7.2 Parameters Settings

7.2.1 Energy Control

7.2.2 AFCI

7.2.3 IPS Check (for Italy CEI0-21 Grid Code Only)

7.3 SmartLogger Networking Scenario

Maintenance

8.1 System Power-Off

8.2 Routine Maintenance

8.3 Troubleshooting

Handling the Inverter

9.1 Removing a SUN2000

9.2 Packing the SUN2000

9.3 Disposing of the SUN2000

Technical Data

10.1 SUN2000 Technical Specifications

10.2 Optimizer Technical Specifications

Grid Codes

Table A-1 Grid Codes

Resetting Password

(Optional) Resetting the WLAN password

Rapid Shutdown

Locating Insulation Resistance Faults

Acronyms and Abbreviations

Related product manuals