Goodwe GW12KT-DT User Manual

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User Manual

Grid-Tied PV Inverter

SDT G2 Series

V1.0-2022-01-17

Table of Contents

Other manuals for Goodwe GW12KT-DT

Quick Installation Guide18 pages

Questions and Answers:

T
timothymcbrideAug 22, 2025
What to do if my Goodwe GW12KT-DT shows 'Utility Loss'?
- D
  Danielle GarnerAug 23, 2025
  If your Goodwe Inverter displays a 'Utility Loss' error, it could be due to several reasons. First, check if there is a power failure in the utility grid by checking other electrical devices. Second, ensure that the AC circuit or AC breaker is properly connected. Finally, verify that the phase sequence of the AC cables is correctly connected, and the neutral wire and PE cable are firmly connected.
B
Barry AndersonSep 2, 2025
What does 'DC Bus High' mean on my Goodwe GW12KT-DT?
- B
  Brittany MackSep 2, 2025
  If your Goodwe Inverter shows 'DC Bus High', it may indicate an internal fault. Ensure that the software version is the latest one. You can also try restarting the inverter to see if it resolves the issue.
T
Timothy ColonSep 1, 2025
What to do if my Goodwe Inverter displays 'DC inject High'?
- D
  Dawn DouglasSep 1, 2025
  If your Goodwe Inverter shows 'DC inject High', it means the DC injection exceeds the allowed range. Check whether the software version is the latest one. Restart the inverter and check whether the inverter can work properly.
C
Carrie SullivanAug 31, 2025
What does 'Ground I Fail' mean on my Goodwe Inverter?
- N
  nguyenbrianAug 31, 2025
  If your Goodwe Inverter displays 'Ground I Fail', it indicates that the input insulation impedance to the ground is decreasing during operation. Check if the inverter's working environment meets the requirements; for example, high humidity on rainy days can cause this. Also, ensure that the components and the AC side are properly grounded.
C
Cheryl BarrettAug 29, 2025
What does 'ARC Fault' mean on my Goodwe Inverter and how to fix it?
- A
  alyssa27Aug 30, 2025
  If your Goodwe Inverter is showing an 'ARC Fault', it could be due to the PV string cables arcing or being in poor contact. Check whether the PV terminals and cables are connected properly. If the fault occurs frequently, contact after-sales service.
J
John EdwardsAug 28, 2025
Why is my Goodwe GW12KT-DT Inverter showing 'PV Over Voltage'?
- D
  Denise LambertAug 29, 2025
  If your Goodwe Inverter displays 'PV Over Voltage', it means that too many PV modules are connected in series, causing the open-circuit voltage to exceed the operating voltage. Check whether the PV string input voltage is consistent with the value displayed on the LCD and meets the maximum input voltage requirements.
A
Ann FowlerAug 27, 2025
What causes 'Fac Fail' on a Goodwe GW12KT-DT Inverter?
- K
  katherine30Aug 27, 2025
  If your Goodwe Inverter shows 'Fac Fail', it indicates that the utility grid frequency is out of the allowed range. Check whether other electrical devices under the same grid connection point is working normally, and whether the main supply is normal. Ensure the grid frequency is within the allowed range and that the phase sequence of the AC cables are connected correctly, and the neutral wire and PE cable are properly and firmly. If the fault happens occasionally, it may be due to instantaneous utility grid frequency change and does not need to be handled.
J
Jeffrey OwensAug 27, 2025
What does 'Vac Fail' mean on my Goodwe GW12KT-DT Inverter?
- C
  Carl BarrettAug 27, 2025
  If your Goodwe Inverter shows 'Vac Fail', it means the utility grid voltage is out of the allowed range. Make sure that the grid voltage is within the allowed range. Also, ensure that the phase sequence of the AC cables are connected correctly, and the neutral wire and PE cable are properly and firmly.
R
Randall PerryAug 25, 2025
What to do if my Goodwe GW12KT-DT displays 'Isolation Fail'?
- M
  Mikayla KnightAug 26, 2025
  If your Goodwe Inverter is showing an 'Isolation Fail' error, it could be due to: 1. A short circuit to the ground in the PV system. Check the PV input cables for any breaks. 2. A moist environment affecting the PV system's insulation. Ensure the module frames and metal bracket are securely grounded. 3. Also, check that the AC side is properly grounded.
R
Rebekah CameronAug 25, 2025
How to fix an 'Over Temperature' error on my Goodwe GW12KT-DT Inverter?
- A
  Anthony HopkinsAug 25, 2025
  If your Goodwe Inverter is showing an 'Over Temperature' error, there are a few things to check: 1. Ensure that the inverter has adequate ventilation and space for heat dissipation. 2. Verify that the ambient temperature is not too high. 3. Confirm that the fans are working correctly and are not blocked.

Goodwe GW12KT-DT Specifications

General

Brand	Goodwe
Model	GW12KT-DT
Category	Inverter
Language	English

Summary

Safety Precautions

General and DC Side Safety

Essential safety guidelines for installation, operation, and specific measures for DC connections.

AC Side and Personal Safety

Safety measures for AC connections, installation, and required personal protective equipment.

Installation Guide

Installation Site and Mounting Requirements

Inverter Installation Procedures

Moving and Mounting the Inverter

Safety instructions for moving and step-by-step guide for physically mounting the inverter.

Electrical Connections

Connection Safety and PE Cable

Safety warnings and procedure for connecting the protective earth (PE) cable to the inverter.

PV Input Cable Connection

Step-by-step guide for connecting the DC input cables from the PV array to the inverter.

AC Output Connection

AC Output Connection Procedure

Step-by-step guide for connecting the AC output cable to the inverter, including terminal details.

Equipment Commissioning

Pre-Operation Checks

Checklist of items to verify before energizing the inverter for the first time.

Power On Procedure

System Commissioning

Inverter Parameter Settings

Setting Parameters via LCD

Maintenance and Troubleshooting

Power Off, Removal, and Disposal

Troubleshooting Common Faults

Guidance for diagnosing and resolving common inverter issues, including fault codes.

Technical Parameters

Input and Output Specifications

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