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Solar inverter · GoodWe · SDT G2 series · CEC approved July 2026

GoodWe GW4000-SDT-20

CEC listing: GW4000-SDT-20 (AS4777-2 2020)

A 4 kW three-phase solar inverter.

Installed in Perth, typical: ~$1,200; Estimate for the inverter alone — your quote will vary
Rated power: 4kW; How much solar it can run at once
Battery-ready: No; Solar-only: adding a battery later means a second inverter

Datasheet (PDF)Compare inverters See the whole SDT G2 series

What we can tell you

Read from the figures on this page. No review written yet.

It is a solar-only inverter: adding a battery later means a second inverter or an AC-coupled battery.
It needs a three-phase supply — check your switchboard, or ask your installer.
We can't confirm it is on Synergy's approved list — a battery paired with it needs that for the WA Battery Scheme, so ask your installer.
It is CEC-approved, which a new install needs to qualify for STCs.

Key specs, in plain terms

The numbers that matter for a home. The full datasheet is below.

Rated power How much solar it can turn into usable power at once: 4kW
Max efficiency How much of the solar you make reaches the house: 98.2%
Phases Needs a three-phase supply — check your switchboard: 3-phase
Type Runs solar only: Solar
Warranty How long GoodWe Technologies Co Ltd stands behind it: 10yr

Full datasheet

Every figure on file for the GoodWe GW4000-SDT-20, by section.

Full datasheet, by section
Specification	Value
Efficiency
Max efficiency	98.2%
European efficiency	97.6%
Physical
IP rating	IP65
Installation requirements
Top clearance	100 mm
Side clearance	100 mm
AC breaker	25 A
Cable gauge	6 mm²
Earthing method	TN-S
DNSP pre-approval	Yes
Estimated install time	8 hrs

Parsed from the manufacturer datasheet, install manual, and warranty document. Confirm against the linked PDFs before relying on a value for a quote or installation.

Features & compatibility

Battery compatible

Backup capable

CEC approval details

CEC approved

28 July 2026

Approval expiry

31 Oct 2026

Status

Active

Eligible for rebates

Yes

About GoodWe Technologies Co Ltd

Years in AU Market

12 years

Australian Office

Yes

CEC-Approved Batteries

CEC-Approved Panels

168

What it costs in Perth

Typical installed, inverter only

$800–$1,600

Estimate confidence: Medium

Prices vary by installer, configuration and site complexity. Get exact quotes from installers you choose.

Explore your options

Compare quotes from installers you choose

WA compliance

Synergy approved list: Not confirmed
ESM compliant: Check

Western Power approval is required for every grid-connected install. Under Emergency Solar Management, a new system must be remotely manageable, or take an export limit instead — ask your installer to confirm this inverter’s ESM status.

Perth performance

Estimate for a full-size array on this inverter

Daily yield: 17.0 kWh
Annual yield: 6,205 kWh

At 5 peak sun hours a day (BOM) with a 15% system derate.

Australian office

Has local presence

Website

www.goodwe.com.au

12 years in Australian market

How it compares

The GoodWe GW4000-SDT-20 against the closest-power inverters from other brands.

Specification	GoodWe GW4000-SDT-20GoodWe	Afore New Energy Technology AF4K-SLAfore New Energy Technology	Afore New Energy Technology HNS4000TLAfore New Energy Technology

Rated power?	4 kW	4 kW	4 kW
Max efficiency?	98.2%best value	0.0%	0.0%
MPPT trackers?	Not verified	Not verified	Not verified

Phases	Three-phase	Single-phase	Single-phase
Type	Solar	Hybrid	Solar
Battery ready	No	Yes	No
Warranty	10 years	Not verified	Not verified

Specs from the CEC register and datasheet enrichment. Indicative — confirm exact figures with your installer.

Documents

10-year inverter warranty

GoodWe GW4000-SDT-20

GOODWE offers a limited 10-year warranty on inverters, covering hardware defects and transportation costs for valid claims. Warranty voids for improper installation or environmental damage. Claims can be submitted through your local distributor or online.

AI-summarised from the manufacturer warranty document. Always confirm against the linked PDF before relying on it for a claim.

Coverage shape: Full-replacement coverage
If you sell the home: Transfers to the next homeowner
What voids it: Non-accredited installation, modifications, tampering, operational failure not reported within one month, and usage against safety regulations.
Environment limits: Faults or damage caused by exposure to sea coasts/saltwater or other aggressive environments without written approval from GOODWE.

Read the official warranty document (PDF)

Fault & error codes — GoodWe GW4000-SDT-20

From the install manual

29 documented

Showing 29 of 29. The official install manual is the authoritative source — always confirm before acting.

13criticalCall your installer
Manual (PDF)
ARC Fault
Likely cause
The PV string cables arc or are in poor contact.
What to do
Check whether the PV terminals and cables are connected properly.
14criticalCall your installer
Manual (PDF)
DC Bus High
Likely cause
Inverter internal fault.
What to do
Restart the inverter to check whether the inverter can work properly.
2criticalCall your installer
Manual (PDF)
Utility Loss
Likely cause
1. Utility grid power failure. 2. The AC circuit or the AC breaker is disconnected.
What to do
Check whether other electrical devices under the same grid connection point are working normally and whether the main supply is normal.
5criticalCall your installer
Manual (PDF)
Isolation Fail
Likely cause
1. The PV system is short-circuited to the ground. 2. The PV system is in a moist environment and the circuit is not well insulated to the ground.
What to do
Check whether the PV input cables are broken.
8criticalCall your installer
Manual (PDF)
PV Over Voltage
Likely cause
Excess PV modules are connected in the series, and the open-circuit voltage is higher than the operating voltage.
What to do
Check whether the PV string voltage meets the maximum input voltage requirements.
DC Bus HighcriticalCall your installer
Manual (PDF)
Inverter internal fault.
Likely cause
Check software version and function.
What to do
Restart the inverter to check functionality.
Isolation FailcriticalCall your installer
Manual (PDF)
The PV system is short-circuited to the ground or in a moist environment.
Likely cause
Check PV input cables and grounding.
What to do
Check for breaks in cables and grounding.
PV Over VoltagecriticalCall your installer
Manual (PDF)
Excess PV modules are connected in series causing high open-circuit voltage.
Likely cause
Check PV string input voltage.
What to do
Ensure that the PV string voltage meets the maximum input voltage requirements.
Relay Check FailcriticalCall your installer
Manual (PDF)
Relay operation check failed.
Likely cause
Internal relay issue.
What to do
Contact after-sales service immediately.
Utility LosscriticalCall your installer
Manual (PDF)
Utility grid power failure.
Likely cause
1. Check whether other electrical devices under the same grid connection point are working normally and whether the main supply is normal. 2. Make sure that the upstream switches of the inverter are connected. 3. Make sure that the phase sequence of the AC cables is connected correctly, and the neutral wire and PE cable are connected properly and firmly.
What to do
Check electrical devices and connections.
Ver. ErrorcriticalCall your installer
Manual (PDF)
Wrong software version.
Likely cause
Contact after-sales service to upgrade the software.
What to do
Contact after-sales service to upgrade the software.
1warningCall your installer
Manual (PDF)
Version Error
Likely cause
Wrong software version.
What to do
Contact after-sales service to upgrade the software.
10warningCall your installer
Manual (PDF)
A Fan Fail
Likely cause
A fault occurs in all fans of the inverter.
What to do
Restart the inverter and check whether the inverter can work normally.
11warningCall your installer
Manual (PDF)
E Fan Fail
Likely cause
A fault occurs on the external fan of the inverter.
What to do
Contact after-sales service.
12warningCall your installer
Manual (PDF)
I Fan Fail
Likely cause
A fault occurs in the internal fan of the inverter.
What to do
Contact after-sales service.
3warningCall your installer
Manual (PDF)
Vac Fail
Likely cause
The utility grid voltage is out of the allowed range.
What to do
Make sure that the grid voltage is within the allowed range.
4warningCall your installer
Manual (PDF)
Fac Fail
Likely cause
The utility grid frequency is out of the allowed range.
What to do
Check whether other electrical devices under the same grid connection point are working normally, and whether the main supply is normal.
6warningCall your installer
Manual (PDF)
DC Inject High
Likely cause
DC injection exceeds the allowed range.
What to do
Check whether the software version is the latest one.
7warningCall your installer
Manual (PDF)
Ground I Fail
Likely cause
The input insulation impedance to the ground decreases when the inverter is operating.
What to do
Make sure that the components are properly grounded and the AC side is properly grounded.
9warningCall your installer
Manual (PDF)
Over Temperature
Likely cause
1. The inverter is installed in a place with poor ventilation. 2. The ambient temperature is too high.
What to do
Check the installation environment and space of the inverter. Make sure that the ventilation meets heat dissipation requirements.
ARC Faultwarning
Manual (PDF)
The PV string cables arc or are in poor contact.
Likely cause
Check cable connections.
What to do
Check PV cables and clear error messages.
DC inject Highwarning
Manual (PDF)
DC injection exceeds the allowed range.
Likely cause
Check if voltage is within specifications.
What to do
Check if the software version is the latest one.
Fac Failwarning
Manual (PDF)
The utility grid frequency is out of the allowed range.
Likely cause
Frequency could vary; check if other devices on grid are okay.
What to do
Check if the grid frequency is within the allowed range.
Ground I Failwarning
Manual (PDF)
The input insulation impedance to the ground decreases when the inverter is operating.
Likely cause
High humidity or poor grounding.
What to do
Make sure that components are grounded properly.
Over Temperaturewarning
Manual (PDF)
The inverter is overheating due to poor ventilation or high ambient temperature.
Likely cause
Ensure good ventilated space for inverter operation.
What to do
Check installation environment and space for ventilation.
Vac Failwarning
Manual (PDF)
The utility grid voltage is out of the allowed range.
Likely cause
Check the grid voltage and wiring.
What to do
Make sure that the grid voltage is within the allowed range.
AFan Failinfo
Manual (PDF)
A fault occurs in all fans of the inverter.
Likely cause
Check fan operation.
What to do
Restart inverter and check fan functionality.
EFan Failinfo
Manual (PDF)
A fault occurs on the external fan of the inverter.
Likely cause
Check the external fan.
What to do
Restart inverter to check if it works now.
IFan FailinfoCall your installer
Manual (PDF)
A fault occurs in the internal fan of the inverter.
Likely cause
Check internal fan operation.
What to do
Contact after-sales service if the fault persists.

Part of the GoodWe SDT G2 series

Compare every GoodWe SDT G2 variant side by side →

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15 kW · 1φ

GEH20-3U-10 (AS4777-2 2020)

20 kW · 1φ

GEH25-3U-10 (AS4777-2 2020)

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GEH29.9-3U-10 (AS4777-2 2020)

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GEH5.0-1U-10 (AS4777-2 2020)

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More from GoodWe Technologies Co Ltd

Other CEC-approved products from GoodWe Technologies Co Ltd available in Australia.

GoodWe Technologies Co Ltd Batteries

GW100KWH-D-10

100.8 kWh · LFP

GW102.4-BAT-AC-G10

100 kWh · LFP

GW112.6-BAT-AC-G10

110 kWh · LFP

GW5.1-BAT-D-G20

5 kWh · LFP

GW5.1-BAT-D-G21

5 kWh · LFP

GW6.0-BAT-D-G20

5.9 kWh · LFP

View all GoodWe Technologies Co Ltd batteries

GoodWe Technologies Co Ltd Solar Panels

BMM-T3/108A(505W) (IEC 61215-2021)

505W

BMM-T3/108A(510W) (IEC 61215-2021)

510W

BMM-T3/108A(515W) (IEC 61215-2021)

515W

BMM-T3/120A(565W) (IEC 61215-2021)

565W

BMM-T3/120A(570W) (IEC 61215-2021)

570W

BMM-T3/120A(575W) (IEC 61215-2021)

575W

View all GoodWe Technologies Co Ltd panels

View full GoodWe Technologies Co Ltd manufacturer profile

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Get a quote from an installer from our network that covers your area. You choose whether to act on it. No obligation.

About this data

All inverter specifications are sourced from the CEC Approved Products Register. Specifications are provided as published by the CEC and may differ from manufacturer datasheets. Verify current specifications with the manufacturer or your installer before purchasing. Not all listed models may be currently available in Western Australia.

Solar inverter · GoodWe · SDT G2 series · CEC approved July 2026

GoodWe GW4000-SDT-20

CEC listing: GW4000-SDT-20 (AS4777-2 2020)

A 4 kW three-phase solar inverter.

Installed in Perth, typical: ~$1,200; Estimate for the inverter alone — your quote will vary
Rated power: 4kW; How much solar it can run at once
Battery-ready: No; Solar-only: adding a battery later means a second inverter

Datasheet (PDF)Compare inverters See the whole SDT G2 series

Spotted something outdated?

What we can tell you

Read from the figures on this page. No review written yet.

It is a solar-only inverter: adding a battery later means a second inverter or an AC-coupled battery.
It needs a three-phase supply — check your switchboard, or ask your installer.
We can't confirm it is on Synergy's approved list — a battery paired with it needs that for the WA Battery Scheme, so ask your installer.
It is CEC-approved, which a new install needs to qualify for STCs.

Key specs, in plain terms

The numbers that matter for a home. The full datasheet is below.

Rated power How much solar it can turn into usable power at once: 4kW
Max efficiency How much of the solar you make reaches the house: 98.2%
Phases Needs a three-phase supply — check your switchboard: 3-phase
Type Runs solar only: Solar
Warranty How long GoodWe Technologies Co Ltd stands behind it: 10yr

Full datasheet

Every figure on file for the GoodWe GW4000-SDT-20, by section.

Full datasheet, by section
Specification	Value
Efficiency
Max efficiency	98.2%
European efficiency	97.6%
Physical
IP rating	IP65
Installation requirements
Top clearance	100 mm
Side clearance	100 mm
AC breaker	25 A
Cable gauge	6 mm²
Earthing method	TN-S
DNSP pre-approval	Yes
Estimated install time	8 hrs

Parsed from the manufacturer datasheet, install manual, and warranty document. Confirm against the linked PDFs before relying on a value for a quote or installation.

Features & compatibility

Battery compatible

Backup capable

CEC approval details

CEC approved

28 July 2026

Approval expiry

31 Oct 2026

Status

Active

Eligible for rebates

Yes

About GoodWe Technologies Co Ltd

Years in AU Market

12 years

Australian Office

Yes

CEC-Approved Batteries

CEC-Approved Panels

168

What it costs in Perth

Typical installed, inverter only

$800–$1,600

Estimate confidence: Medium

Prices vary by installer, configuration and site complexity. Get exact quotes from installers you choose.

Explore your options

Compare quotes from installers you choose

WA compliance

Synergy approved list: Not confirmed
ESM compliant: Check

Perth performance

Estimate for a full-size array on this inverter

Daily yield: 17.0 kWh
Annual yield: 6,205 kWh

At 5 peak sun hours a day (BOM) with a 15% system derate.

Australian office

Has local presence

Website

www.goodwe.com.au

12 years in Australian market

How it compares

The GoodWe GW4000-SDT-20 against the closest-power inverters from other brands.

Specification	GoodWe GW4000-SDT-20GoodWe	Afore New Energy Technology AF4K-SLAfore New Energy Technology	Afore New Energy Technology HNS4000TLAfore New Energy Technology

Rated power?	4 kW	4 kW	4 kW
Max efficiency?	98.2%best value	0.0%	0.0%
MPPT trackers?	Not verified	Not verified	Not verified

Phases	Three-phase	Single-phase	Single-phase
Type	Solar	Hybrid	Solar
Battery ready	No	Yes	No
Warranty	10 years	Not verified	Not verified

Specs from the CEC register and datasheet enrichment. Indicative — confirm exact figures with your installer.

Documents

10-year inverter warranty

GoodWe GW4000-SDT-20

AI-summarised from the manufacturer warranty document. Always confirm against the linked PDF before relying on it for a claim.

Coverage shape: Full-replacement coverage
If you sell the home: Transfers to the next homeowner
What voids it: Non-accredited installation, modifications, tampering, operational failure not reported within one month, and usage against safety regulations.
Environment limits: Faults or damage caused by exposure to sea coasts/saltwater or other aggressive environments without written approval from GOODWE.

Read the official warranty document (PDF)

Fault & error codes — GoodWe GW4000-SDT-20

From the install manual

29 documented

Showing 29 of 29. The official install manual is the authoritative source — always confirm before acting.

13criticalCall your installer
Manual (PDF)
ARC Fault
Likely cause
The PV string cables arc or are in poor contact.
What to do
Check whether the PV terminals and cables are connected properly.
14criticalCall your installer
Manual (PDF)
DC Bus High
Likely cause
Inverter internal fault.
What to do
Restart the inverter to check whether the inverter can work properly.
2criticalCall your installer
Manual (PDF)
Utility Loss
Likely cause
1. Utility grid power failure. 2. The AC circuit or the AC breaker is disconnected.
What to do
Check whether other electrical devices under the same grid connection point are working normally and whether the main supply is normal.
5criticalCall your installer
Manual (PDF)
Isolation Fail
Likely cause
1. The PV system is short-circuited to the ground. 2. The PV system is in a moist environment and the circuit is not well insulated to the ground.
What to do
Check whether the PV input cables are broken.
8criticalCall your installer
Manual (PDF)
PV Over Voltage
Likely cause
Excess PV modules are connected in the series, and the open-circuit voltage is higher than the operating voltage.
What to do
Check whether the PV string voltage meets the maximum input voltage requirements.
DC Bus HighcriticalCall your installer
Manual (PDF)
Inverter internal fault.
Likely cause
Check software version and function.
What to do
Restart the inverter to check functionality.
Isolation FailcriticalCall your installer
Manual (PDF)
The PV system is short-circuited to the ground or in a moist environment.
Likely cause
Check PV input cables and grounding.
What to do
Check for breaks in cables and grounding.
PV Over VoltagecriticalCall your installer
Manual (PDF)
Excess PV modules are connected in series causing high open-circuit voltage.
Likely cause
Check PV string input voltage.
What to do
Ensure that the PV string voltage meets the maximum input voltage requirements.
Relay Check FailcriticalCall your installer
Manual (PDF)
Relay operation check failed.
Likely cause
Internal relay issue.
What to do
Contact after-sales service immediately.
Utility LosscriticalCall your installer
Manual (PDF)
Utility grid power failure.
Likely cause
1. Check whether other electrical devices under the same grid connection point are working normally and whether the main supply is normal. 2. Make sure that the upstream switches of the inverter are connected. 3. Make sure that the phase sequence of the AC cables is connected correctly, and the neutral wire and PE cable are connected properly and firmly.
What to do
Check electrical devices and connections.
Ver. ErrorcriticalCall your installer
Manual (PDF)
Wrong software version.
Likely cause
Contact after-sales service to upgrade the software.
What to do
Contact after-sales service to upgrade the software.
1warningCall your installer
Manual (PDF)
Version Error
Likely cause
Wrong software version.
What to do
Contact after-sales service to upgrade the software.
10warningCall your installer
Manual (PDF)
A Fan Fail
Likely cause
A fault occurs in all fans of the inverter.
What to do
Restart the inverter and check whether the inverter can work normally.
11warningCall your installer
Manual (PDF)
E Fan Fail
Likely cause
A fault occurs on the external fan of the inverter.
What to do
Contact after-sales service.
12warningCall your installer
Manual (PDF)
I Fan Fail
Likely cause
A fault occurs in the internal fan of the inverter.
What to do
Contact after-sales service.
3warningCall your installer
Manual (PDF)
Vac Fail
Likely cause
The utility grid voltage is out of the allowed range.
What to do
Make sure that the grid voltage is within the allowed range.
4warningCall your installer
Manual (PDF)
Fac Fail
Likely cause
The utility grid frequency is out of the allowed range.
What to do
Check whether other electrical devices under the same grid connection point are working normally, and whether the main supply is normal.
6warningCall your installer
Manual (PDF)
DC Inject High
Likely cause
DC injection exceeds the allowed range.
What to do
Check whether the software version is the latest one.
7warningCall your installer
Manual (PDF)
Ground I Fail
Likely cause
The input insulation impedance to the ground decreases when the inverter is operating.
What to do
Make sure that the components are properly grounded and the AC side is properly grounded.
9warningCall your installer
Manual (PDF)
Over Temperature
Likely cause
1. The inverter is installed in a place with poor ventilation. 2. The ambient temperature is too high.
What to do
Check the installation environment and space of the inverter. Make sure that the ventilation meets heat dissipation requirements.
ARC Faultwarning
Manual (PDF)
The PV string cables arc or are in poor contact.
Likely cause
Check cable connections.
What to do
Check PV cables and clear error messages.
DC inject Highwarning
Manual (PDF)
DC injection exceeds the allowed range.
Likely cause
Check if voltage is within specifications.
What to do
Check if the software version is the latest one.
Fac Failwarning
Manual (PDF)
The utility grid frequency is out of the allowed range.
Likely cause
Frequency could vary; check if other devices on grid are okay.
What to do
Check if the grid frequency is within the allowed range.
Ground I Failwarning
Manual (PDF)
The input insulation impedance to the ground decreases when the inverter is operating.
Likely cause
High humidity or poor grounding.
What to do
Make sure that components are grounded properly.
Over Temperaturewarning
Manual (PDF)
The inverter is overheating due to poor ventilation or high ambient temperature.
Likely cause
Ensure good ventilated space for inverter operation.
What to do
Check installation environment and space for ventilation.
Vac Failwarning
Manual (PDF)
The utility grid voltage is out of the allowed range.
Likely cause
Check the grid voltage and wiring.
What to do
Make sure that the grid voltage is within the allowed range.
AFan Failinfo
Manual (PDF)
A fault occurs in all fans of the inverter.
Likely cause
Check fan operation.
What to do
Restart inverter and check fan functionality.
EFan Failinfo
Manual (PDF)
A fault occurs on the external fan of the inverter.
Likely cause
Check the external fan.
What to do
Restart inverter to check if it works now.
IFan FailinfoCall your installer
Manual (PDF)
A fault occurs in the internal fan of the inverter.
Likely cause
Check internal fan operation.
What to do
Contact after-sales service if the fault persists.

Part of the GoodWe SDT G2 series

Compare every GoodWe SDT G2 variant side by side →

More GoodWe Technologies Co Ltd Inverters

GEH10-1U-10 (AS4777-2 2020)

10 kW · 1φ

GEH15-3U-10 (AS4777-2 2020)

15 kW · 1φ

GEH20-3U-10 (AS4777-2 2020)

20 kW · 1φ

GEH25-3U-10 (AS4777-2 2020)

25 kW · 1φ

GEH29.9-3U-10 (AS4777-2 2020)

29.9 kW · 1φ

GEH5.0-1U-10 (AS4777-2 2020)

5 kW · 1φ

View all GoodWe Technologies Co Ltd inverters