Huawei SUN2000-20KTL-M3 - User Manual

Huawei SUN2000-20KTL-M3

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SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL, 40KTL)-

M3

User Manual

Issue 18

Date 2024-03-10

HUAWEI TECHNOLOGIES CO., LTD.

Table of Contents

About this Document3
- Table of Contents8
1 Safety Information11
- Personal Safety12
- Electrical Safety14
- Environment Requirements17
- Mechanical Safety18
2 Overview23
- Product Introduction23
- Appearance26
- Label Description27
- Working Principles29
- Circuit Diagram29
- Working Modes30
3 Inverter Storage32
4 Installation34
- Checking before Installation34
- Tools35
- Determining the Installation Position36
- Moving the Inverter41
- Installing the Mounting Bracket41
- Support Mounting42
- Wall Mounting43
- Installing the Inverter44
5 Electrical Connections47
- Precautions47
- Preparing Cables48
- Connecting the PE Cable51
- Connecting an AC Output Power Cable53
- Connecting DC Input Power Cables58
- Cable Connection Description58
- Connecting Cables to Amphenol Helios H4 Terminals60
- Connecting Cables to Staubli MC4 Terminals61
- Optional) Installing the Smart Dongle63
- Connecting Signal Cables65
- Communication Modes68
- Optional) Connecting the RS485 Communications Cable to the SUN200070
- Optional) Connecting the RS485 Communications Cable to the Power Meter71
- Optional) Connecting the Power Grid Scheduling Signal Cable72
- Optional) Connecting the Rapid Shutdown Signal Cable73
6 Commissioning74
- Checking before Power-On74
- System Power-On75
7 Human-Machine Interaction77
- Scenario in Which Sun2000S Are Connected to the Fusionsolar Smart PV Management System78
- Optional) Registering an Installer Account78
- Creating a PV Plant and a User80
- Smartlogger Networking81
- Scenario in Which Inverters Connect to Other Management Systems81
- Energy Control81
- Grid-Tied Point Control81
- Setting Feed-In at Limited Current85
- Connecting the App to the Inverter or Smart Dongle86
- Scenario Where the App Connects to the Smartlogger87
- Apparent Power Control on the Inverter Output Side88
8 Maintenance90
- System Power-Off90
- Routine Maintenance91
- Alarm Reference92
9 Handling the Inverter93
- Removing the SUN200093
- Packing the SUN200093
- Disposing of the SUN200093
10 Technical Specifications94
A Grid Codes105
B Device Commissioning121
C Built-In PID Recovery124
D Rapid Shutdown125
E NS Protection126
F Resetting a Password127
G Setting Dry Contact Scheduling Parameters128
H Afci129
I PV String Access Detection131
J Smart I-V Curve Diagnosis134
K Locating Insulation Resistance Faults135
L Contact Information139
M Digital Power Customer Service141
N Acronyms and Abbreviations142

Other manuals for Huawei SUN2000-20KTL-M3

Quick Guide50 pages

Questions and Answers:

S
stuart66Sep 23, 2025
How to troubleshoot 'Built-in PID operation abnormal' on Huawei SUN2000-20KTL-M3 Inverter?
- D
  Derek FoxSep 23, 2025
  If you encounter a 'Built-in PID operation abnormal' error on your Huawei Inverter: ? If Cause ID = 1: Turn off the AC output switch and DC input switch, wait for a period of time, and then turn on the DC input switch and AC output switch. If the alarm persists, contact your dealer or Huawei technical support. ? If Cause ID = 2: Check the impedance between the PV array output and the ground. If a short circuit occurs or the insulation is insufficient, rectify the fault. If the alarm persists, contact your dealer or Huawei technical support.
D
Dr. Ann MartinezAug 23, 2025
Why is my Huawei SUN2000-20KTL-M3 showing 'High string input voltage'?
- C
  Christopher WillisAug 25, 2025
  The 'High string input voltage' error on your Huawei Inverter means the PV array isn't configured correctly. There are too many PV modules connected in series, causing the PV string 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 open-circuit voltage is at or below the maximum inverter operating voltage. The alarm should then disappear.
A
Amanda MartinezAug 25, 2025
What to do if my Huawei SUN2000-20KTL-M3 Inverter displays 'DC arc fault'?
- K
  Kimberly MedinaAug 26, 2025
  If your Huawei Inverter is showing a 'DC arc fault', it means the PV string power cables are arcing or have poor contact. You should check the PV string cables for arcing or poor connections.
A
Angelica JonesAug 26, 2025
What causes 'String reverse connection' in Huawei SUN2000-20KTL-M3 Inverter and how to fix it?
- C
  Charlene TurnerAug 27, 2025
  The 'String reverse connection' error in your Huawei Inverter means the PV string polarity is reversed. To resolve this, wait until night when solar irradiance decreases and the PV string current drops below 0.5 A. Then, turn off both DC switches and correct the PV string connection.
J
Jorge LynchAug 27, 2025
Why does my Huawei SUN2000-20KTL-M3 Inverter show 'Grid overvoltage'?
- T
  Tammy HaneyAug 27, 2025
  A 'Grid overvoltage' alarm on your Huawei Inverter indicates that the power grid voltage exceeds the upper threshold, or the high voltage duration has exceeded the value specified by HVRT. If the alarm is occasional, the power grid may be temporarily abnormal, and the inverter should recover automatically. If the alarm persists, check if the power grid frequency is within the acceptable range, and contact the local power operator if it is not. If the frequency is normal, consider modifying the grid overfrequency protection threshold through the app, SmartLogger, or NMS with the consent of the local power operator. Also, check whether the peak voltage of the power grid is too high, and if the alarm persists long-term, contact the local power operator.
A
Amanda EdwardsSep 15, 2025
What does it mean if my Huawei SUN2000-20KTL-M3 Inverter shows a 'Device fault'?
- P
  probertsSep 15, 2025
  If your Huawei Inverter displays a 'Device fault', it indicates an unrecoverable fault has occurred within the inverter's internal circuitry. To attempt a resolution, turn off the AC output switch and DC input switch, wait 5 minutes, and then turn them back on. If the alarm persists, contact your dealer or Huawei technical support.
O
ojacksonSep 12, 2025
What does 'Abnormal residual current' mean on Huawei SUN2000-20KTL-M3?
- C
  connor76Sep 13, 2025
  An 'Abnormal residual current' alarm on your Huawei Inverter indicates that the insulation impedance of the input side to PE decreases when the inverter is operating. If the alarm occurs accidentally, the external power cable may be abnormal temporarily, and the inverter automatically recovers after the fault is rectified. If the alarm persists or lasts a long time, check whether the impedance between the PV string and ground is too low.
A
Alisha RodriguezSep 13, 2025
What to do if Huawei SUN2000-20KTL-M3 Inverter displays 'AFCI self-check failure'?
- N
  Nicolas WheelerSep 14, 2025
  To address an 'AFCI self-check failure' on your Huawei Inverter, turn off the AC output switch and DC input switch, and then turn them on again after 5 minutes. If the alarm persists, contact Huawei technical support.
M
Margaret MorrisSep 5, 2025
How to deal with 'Low insulation resistance' error on Huawei Inverter?
- M
  Melissa BlakeSep 5, 2025
  If your Huawei Inverter is showing a 'Low insulation resistance' error, it could be due to: ? The PV array being short-circuited with PE. ? The PV string being in a moist environment for a long time, and the circuit not being well insulated to ground. To address this: ? Check the impedance between the PV string and the PE cable. If a short circuit occurs, rectify the fault. ? Check whether the PE cable of the inverter is correctly connected. ? If you've confirmed that the impedance is lower than the specified protection threshold in a cloudy or rainy environment, log in to the app, SmartLogger, or NMS and set the Insulation resistance protection threshold.
H
hpinedaSep 2, 2025
What does 'Grid underfrequency' mean for Huawei SUN2000-20KTL-M3 Inverter?
- T
  travisandrewSep 2, 2025
  A 'Grid underfrequency' alarm on your Huawei Inverter indicates a power grid exception. The actual power grid frequency is lower than the requirements for the local power grid code. If the alarm occurs occasionally, the power grid may be temporarily abnormal. The inverter automatically recovers after detecting that the power grid becomes normal. If the alarm persists, check whether the power grid frequency is within the acceptable range. If not, contact the local power operator. If yes, modify the grid underfrequency protection threshold through the app, SmartLogger, or NMS with the consent of the local power operator.

Huawei SUN2000-20KTL-M3 Specifications

General

Input Voltage Range	200 V - 1000 V
Max. Efficiency	98.6%
MPPT Efficiency	99.9%
Number of MPPTs	2
Cooling Method	Natural convection
Protection Class	IP65
Max. DC Voltage	1100 V
Start Voltage	200 V
Rated AC Voltage	400 V
European Efficiency	98.3%
Rated Output Voltage	400 V
Output Frequency	50 Hz / 60 Hz
Rated Output Power	20000 W
Max. AC Power	22000 W
Operating Temperature Range	-25 °C ~ +60 °C
Maximum Output Power	22000 W
Weight (kg) Model 2	25
Weight (kg) Model 3	25
Max. DC Power	30, 000 W
Maximum DC Input Power	30000 W

Summary

About This Document

Purpose

Document describes the SUN2000 inverter's features, functions, and safety precautions.

Symbol Conventions

Defines symbols used in the document for hazards and notes.

Safety Information

Personal Safety

Guidelines and warnings for personal safety during operation and maintenance.

Electrical Safety

Warnings and precautions related to electrical hazards and safe practices.

Environment Requirements

Requirements for installation and operating environments for optimal performance and safety.

Mechanical Safety

Safety precautions related to the physical handling and installation of the equipment.

Overview

Product Introduction

Introduces the SUN2000 inverter and its function in grid-tied PV systems.

Appearance

Provides a visual overview of the SUN2000 inverter's external components.

Label Description

Explains the meaning of various labels and warnings found on the inverter enclosure.

Working Principles

Explains the internal workings and operating modes of the SUN2000 inverter.

Installation

Tools

Lists necessary tools and instruments required for installation.

Determining the Installation Position

Essential requirements for selecting a suitable installation location for the inverter.

Installing the Mounting Bracket

Instructions for installing the mounting bracket for support or wall mounting.

Installing the Inverter

Step-by-step guide to installing the inverter onto the mounting bracket.

Electrical Connections

Precautions

Critical safety warnings and precautions before making electrical connections.

Connecting the PE Cable

Step-by-step instructions for securely connecting the protective earthing (PE) cable.

Connecting an AC Output Power Cable

Precautions and procedures for connecting the AC output power cable.

Connecting DC Input Power Cables

Instructions and precautions for connecting DC input power cables to the inverter.

Commissioning

Checking Before Power-On

Checklist for verifying installation and connections before powering on the inverter.

System Power-On

Step-by-step procedure for powering on the inverter system and checking its status.

Human-Machine Interaction

Scenario in Which SUN2000 s Are Connected to the FusionSolar Smart PV Management System

How to connect and configure the inverter using the FusionSolar app.

Energy Control

Settings for managing inverter output power and current to meet grid requirements.

Maintenance

System Power-Off

Procedure and precautions for safely powering off the inverter system.

Routine Maintenance

Schedule and methods for performing routine maintenance on the inverter.

Technical Specifications

Input

Details input specifications like recommended power, voltage, and current for the SUN2000 models.

Output

Details output specifications like rated power, voltage, and current for the SUN2000 models.

Protection

Lists the protection features available in the SUN2000 inverter.

General Specifications

Provides general specifications like dimensions, weight, temperature, and humidity.

Grid Codes

Device Commissioning

Access Device commissioning screen.

How to access the device commissioning screen via the FusionSolar app.

Built-in PID Recovery

Rapid Shutdown

NS Protection

Resetting a Password

AFCI

PV String Access Detection

Locating Insulation Resistance Faults

Contact Information

Acronyms and Abbreviations

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