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:

C
carlosandersonSep 8, 2025
What does 'Output overcurrent' mean on my Huawei SUN2000-20KTL-M3?
- L
  Lisa HodgeSep 9, 2025
  An 'Output overcurrent' alarm on your Huawei Inverter indicates that the power grid voltage has dropped dramatically or the power grid is short-circuited. As a result, the inverter's transient output current exceeds the upper threshold, triggering protection. The inverter monitors external operating conditions in real time and automatically recovers after the fault is rectified. If the alarm persists and affects the energy yield of the PV plant, check whether the output is short-circuited. If the fault cannot be rectified, contact your dealer or Huawei technical support.
D
Dylan BanksSep 7, 2025
What does 'Unstable grid frequency' mean on a Huawei SUN2000-20KTL-M3 Inverter?
- M
  Mark LambSep 7, 2025
  An 'Unstable grid frequency' alarm on your Huawei Inverter indicates a power grid exception. The actual change rate of the power grid frequency does not meet the requirements for the local power grid code. If the alarm occurs occasionally, the power grid may be temporarily abnormal, and the inverter will automatically recover 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.
M
Mrs. Evelyn RossAug 22, 2025
What to do if Huawei SUN2000-20KTL-M3 Inverter shows 'Grid Loss'?
- N
  nsalazarAug 22, 2025
  If your Huawei Inverter displays a 'Grid Loss' alarm, it indicates a power grid outage, a disconnected AC circuit, or a turned-off AC switch. The alarm should clear automatically once the power grid recovers. You can also check if the AC circuit is disconnected or the AC switch is off.
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.
K
Kimberly CrosbySep 4, 2025
What to do if Huawei Inverter shows 'Phase wire short-circuited to PE'?
- B
  bgonzalezSep 4, 2025
  If your Huawei Inverter displays 'Phase wire short-circuited to PE', it means the impedance of the output phase wire to PE is low, or the output phase wire is short-circuited to PE. Check the impedance of the output phase wire to PE to locate the position with low impedance and rectify the fault.
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.
T
tmannSep 1, 2025
What does 'Grid overfrequency' mean on my Huawei SUN2000-20KTL-M3?
- S
  sophia88Sep 1, 2025
  A 'Grid overfrequency' alarm on a Huawei Inverter indicates a power grid exception where the actual power grid frequency is higher than the requirements for the local power grid code. If the alarm occurs occasionally, it might be a temporary power grid issue, and the inverter should recover automatically. If the alarm persists, verify that the power grid frequency is within the acceptable range. If it's not, contact the local power operator. If the frequency is within range, consider modifying the grid overfrequency protection threshold via the app, SmartLogger, or NMS, with the consent of the local power operator.
H
Hannah WeberAug 31, 2025
How to troubleshoot 'Abnormal grounding' on Huawei SUN2000-20KTL-M3?
- A
  Anna HeathAug 31, 2025
  If you're experiencing 'Abnormal grounding' with your Huawei Inverter, it could be due to: ? The neutral wire or PE cable of the inverter not being connected. ? The output mode set for the inverter being inconsistent with the cable connection mode. To resolve this, power off the inverter (turn off the AC output switch and DC input switch, and wait for a period of time). Then: ? Check whether the PE cable for the inverter is connected properly. ? If the inverter is connected to a TN power grid, check whether the neutral wire is properly connected and whether the voltage of the neutral wire to ground is normal. ? After powering the inverter back on, check whether the output mode set for the inverter is consistent with the output cable connection mode.
J
Jason AndrewsAug 30, 2025
What causes 'String current backfeed' on a Huawei SUN2000-20KTL-M3 Inverter?
- A
  Ana JohnsonAug 30, 2025
  The 'String current backfeed' error on your Huawei Inverter is caused by an insufficient number of PV modules connected in series to the PV string, resulting in a terminal voltage lower than that of other strings. To fix 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, turn off all DC switches, and adjust the number of PV modules in the PV string. 2. Check whether the open-circuit voltage of the PV string is abnormal. 3. Check whether the PV string is shaded.
S
sbishopAug 28, 2025
Why is my Huawei Inverter showing 'Grid undervoltage'?
- D
  darmstrongAug 29, 2025
  A 'Grid undervoltage' alarm on your Huawei Inverter means the power grid voltage is below the lower threshold, or the low-voltage duration has exceeded the value specified by LVRT. If the alarm occurs occasionally, the power grid may be temporarily abnormal, and the inverter should recover automatically. If it persists, verify that the power grid voltage is within the acceptable range and contact your local power operator if it's not. If the voltage is within range, you might need to modify the grid undervoltage protection threshold using the app, SmartLogger, or NMS, but only with the consent of the local power operator. Finally, check the AC circuit breaker and AC output power cable if the alarm continues.

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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