Growatt MID 20KTL3-X - User Manual

Questions and Answers

R
Rachel CarneySep 10, 2025
How do I fix 'Communication fault M3 didn't receive SP-CT data' on my Growatt MID 20KTL3-X Inverter?
- R
  rmillsSep 10, 2025
  If your Growatt Inverter displays 'Communication fault M3 didn't receive SP-CT data', check the communication wire. If the error message persists, it is recommended to contact the manufacturer.
R
Robert LeachAug 22, 2025
What to do if my Growatt MID 20KTL3-X Inverter displays 'No Utility'?
- D
  Daniel CraigAug 22, 2025
  If your Growatt Inverter shows 'No Utility', first confirm if the grid is lost or not. If the error message persists, it is recommended to contact the manufacturer.
J
Jeffrey RosalesAug 25, 2025
How to troubleshoot a 'No AC Connection' error on a Growatt Inverter?
- G
  gardnerjulieAug 25, 2025
  If your Growatt Inverter shows 'No AC Connection', first shutdown the system and check the AC wiring. If the error message persists, it is recommended to contact the manufacturer.
P
Patricia BowenAug 26, 2025
What causes 'AC V Outrange' on a Growatt Inverter and how do I fix it?
- B
  Brett McguireAug 27, 2025
  If your Growatt Inverter indicates 'AC V Outrange', begin by checking the grid voltage. If the error message continues to appear even when the grid voltage is within the tolerable range, contact the manufacturer.
J
Joel AdamsAug 27, 2025
What should I do if my Growatt MID 20KTL3-X shows a 'Grid frequency outrange' error?
- X
  xconnerAug 28, 2025
  If your Growatt Inverter displays 'Grid frequency outrange', check if the frequency is within the specified range. If the error message persists, it is recommended to contact the manufacturer.
J
Jill BuchananAug 29, 2025
How to fix a 'PE abnormal' error on a Growatt Inverter?
- J
  jose41Aug 29, 2025
  If your Growatt Inverter displays 'PE abnormal', check the PE line to ensure it is making good contact. If the error message persists, contact the manufacturer.
P
Patricia GreeneSep 18, 2025
What happens if the DC input voltage exceeds the maximum on a Growatt MID 20KTL3-X Inverter?
- T
  Tina Blanchard MDSep 18, 2025
  If your Growatt Inverter indicates that 'The DC input voltage is exceeding the maximum tolerable value', immediately disconnect the DC switch and check the voltage. If the fault code persists after the normal voltage is restored, contact the manufacturer.
M
Martin AustinSep 12, 2025
How to fix 'String PID quick connect terminal detection error' on Growatt MID 20KTL3-X Inverter?
- A
  Anthony SmithSep 12, 2025
  If your Growatt Inverter displays 'String PID quick connect terminal detection error', after shutdown, check the string terminal wiring. If the error message persists, it is recommended to contact the manufacturer.
O
Olivia RandallSep 8, 2025
What to do if Growatt MID 20KTL3-X Inverter reports 'Fan function abnormal'?
- R
  Rodney MoranSep 8, 2025
  If your Growatt Inverter displays 'Fan function abnormal', after shutdown, check the fan connection and replace the fan. If the error message persists, it is recommended to contact the manufacturer.
D
dgriffinSep 4, 2025
How to troubleshoot a 'Communication fault' on a Growatt Inverter?
- K
  kellermonicaSep 5, 2025
  If your Growatt Inverter displays 'Communication fault', check the communication wire. If the error message persists, it is recommended to contact the manufacturer.

Summary

Introduction

Applicable Personnel

Product overview and features

Safety instructions

Outlines essential safety precautions and warnings for installation, operation, and maintenance of the inverter.

Unpacking and Inspection

Installation

Basic installation requirements

Lists fundamental prerequisites, wall suitability, and environmental conditions for safe inverter installation.

Mounting wall mount

Provides instructions and specifications for securely mounting the inverter unit onto a wall.

Installing the inverter

Guides users through the physical process of hanging and securing the inverter onto its wall mount.

Inverter Wiring

Safety

Highlights critical safety measures to be observed during AC and DC wiring procedures to prevent electric shock.

AC side wiring

Details the procedures and precautions for connecting AC power cables, including circuit breaker requirements.

DC side wiring

Explains the steps and safety considerations for connecting DC power from PV modules, including voltage limits.

Connecting signal line

Debugging

Operating Mode

Normal mode

Failure mode

Shutdown mode

OLED Display and Touch Buttons

Communication and Monitoring

RS485

DRM

USB-A

Start and Shut Down the Inverter

Start the inverter

Shut down the inverter

Fan Maintenance

Troubleshooting

Error message

Explains how error messages are displayed on the OLED screen and necessary information for support.

System error

Lists system warning codes, their fault descriptions, and suggested troubleshooting steps.

Specification

Parameter

Growatt MID 20KTL3-X Specifications

General

Model	MID 20KTL3-X
Category	Inverter
Max. DC Voltage	1100 V
Nominal AC Power	20000 W
Max. DC Power	30000 W
Start Voltage	200 V
Nominal DC Voltage	600 V
MPPT Voltage Range	200 - 1000 V
Number of MPP Trackers	2
Max. AC Power	22000 VA
Nominal AC Voltage	400 V
Nominal Grid Frequency	50/60 Hz
Total Harmonic Distortion	<3%
Power Factor Adjustment Range	0.8 leading - 0.8 lagging
DC Connection Type	MC4
Protection Degree	IP65
Topology	Transformerless
Operating Temperature Range	-25°C to +60°C
Communication Interfaces	WiFi, RS485
AC Connection Type	Terminal
Humidity Range	0-100% (non-condensing)