Goodwe GW12K-SDT-20 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 GW12K-SDT-20

Quick Installation Guide22 pages

Questions and Answers:

S
Sierra DiazAug 22, 2025
What to do if my Goodwe GW12K-SDT-20 shows 'Utility Loss'?
- M
  monica94Aug 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.
M
Michele MillerSep 1, 2025
What to do if my Goodwe GW12K-SDT-20 displays 'DC inject High'?
- R
  Ryan RiveraSep 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.
J
Jacqueline AndersonAug 31, 2025
What does 'Ground I Fail' mean on my Goodwe Inverter?
- S
  smithgabrielAug 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.
D
danielsmithAug 30, 2025
What does 'ARC Fault' mean on my Goodwe GW12K-SDT-20 and how to fix it?
- A
  Austin FoxAug 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.
W
William SchroederAug 28, 2025
Why is my Goodwe Inverter showing 'PV Over Voltage'?
- M
  Monica ArmstrongAug 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.
N
Nancy BishopAug 27, 2025
What causes 'Fac Fail' on a Goodwe Inverter?
- L
  Lisa HamptonAug 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.
B
Brittany StanleyAug 27, 2025
What does 'Vac Fail' mean on my Goodwe Inverter?
- D
  Diamond StewartAug 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.
P
paul00Aug 25, 2025
What to do if my Goodwe Inverter displays 'Isolation Fail'?
- B
  Brandi KingAug 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.
T
Timothy PattersonAug 25, 2025
How to fix an 'Over Temperature' error on my Goodwe GW12K-SDT-20 Inverter?
- S
  Sarah HernandezAug 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 GW12K-SDT-20 Specifications

General

Model	GW12K-SDT-20
Rated Output Power	12000W
Input Voltage Range	200 - 1000 V
Max. DC Input Voltage	1100 V
MPPT Voltage Range	200 - 850 V
Nominal AC Output Power	12000W
Number of MPPT	2
Protection Degree	IP65
Weight	22 kg
Max. DC Input Power	18000W
Max. AC Output Power	13200 W
Operating Temperature Range	-25°C to +60°C
Cooling Method	Natural Cooling

Summary

Safety Precaution

2.1 General Safety

General safety guidelines for installation and operation.

2.2 DC Side Safety

Safety precautions specific to the DC side connections.

2.3 AC Side Safety

Safety precautions specific to the AC side connections.

Installation

5.1 Installation Requirements

Covers environmental, mounting, angle, and tool requirements for installation.

5.2 Inverter Installation Steps

Details the process of moving and physically installing the inverter.

Electrical Connection

6.1 Safety Precautions

Safety guidelines for all electrical connection procedures.

6.3 PV Input Cable Connection

Procedure for connecting the DC input cables from PV modules.

6.4 AC Output Cable Connection

Procedure for connecting the AC output cable to the grid.

6.5 Communication Setup

Equipment Commissioning

7.1 Pre-Power On Checks

7.2 Power On Procedure

System Commissioning

8.1 Indicators and Buttons

8.2 Setting Inverter Parameters via LCD

8.3 Setting Inverter Parameters via App

Maintenance

9.1 Power Off the Inverter

9.4 Troubleshooting

9.5 Routine Maintenance

Technical Parameters

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