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Hybrid inverter · FoxESS · KH series · CEC approved June 2025

FoxESS KH9

CEC listing: KH9 (AS4777-2 2020)

A 9 kW single-phase hybrid inverter that is battery-ready.

Installed in Perth, typical: ~$4,275; Estimate for the inverter alone — your quote will vary
Rated power: 9kW; How much solar it can run at once
Battery-ready: Yes; Hybrid: a battery plugs straight in, no second box

Datasheet (PDF)Compare inverters See the whole KH series

What we can tell you

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

It is a hybrid inverter: solar and a battery run from the one unit, so adding a battery later doesn't need a second box.
It runs on a standard single-phase supply.
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: 9kW
Phases Runs on a standard single-phase supply: Single
Type Runs solar and a battery from one unit: Hybrid
Warranty How long FOXESS CO LTD stands behind it: 5yr

Full datasheet

Every figure on file for the FoxESS KH9, by section.

Full datasheet, by section
Specification	Value
Physical
IP rating	IP65
Installation requirements
AC breaker	80 A
Cable gauge	16 mm²

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

Yes

Backup capable

Yes

CEC approval details

CEC approved

13 June 2025

Approval expiry

13 June 2028

Status

Active

Eligible for rebates

Yes

About FOXESS CO LTD

Years in AU Market

7 years

Australian Office

Yes

CEC-Approved Batteries

116

CEC-Approved Panels

What it costs in Perth

Typical installed, inverter only

$3,150–$5,400

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: 38.3 kWh
Annual yield: 13,961 kWh

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

Australian office

Has local presence

Website

au.fox-ess.com

7 years in Australian market

How it compares

The FoxESS KH9 against the closest-power inverters from other brands.

Specification	FoxESS KH9FoxESS	Energizer Force 9.0HS+Energizer	Energizer Force 9.0SEnergizer

Rated power?	9 kW	9 kW	9 kW
Max efficiency?	0.0%	0.0%	0.0%
MPPT trackers?	Not verified	Not verified	Not verified

Phases	Single-phase	Single-phase	Single-phase
Type	Hybrid	Hybrid	Solar
Battery ready	Yes	Yes	No
Warranty	5 years	Not verified	Not verified

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

Documents

5-year inverter warranty

FoxESS KH9

This warranty covers defects in materials and workmanship for five years, and allows transfer to a new owner. Common exclusions include improper installation and environmental conditions.

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

Coverage shape: Pro-rata — value reduces with age
If you sell the home: Transfers to the next homeowner
What voids it: The warranty is void if the inverter is installed by non-accredited installers, modified, or used outside the specified operating parameters.
Environment limits: The warranty does not cover damages caused by extreme climates such as salt exposure, excessive heat, or flooding.

Read the official warranty document (PDF)

Fault & error codes — FoxESS KH9

From the install manual

19 documented

Showing 19 of 19. The official install manual is the authoritative source — always confirm before acting.

Bat Volt FaultcriticalCall your installer
Manual (PDF)
Battery voltage fault.
Likely cause
Battery issue or wrong voltage range.
What to do
Check if the battery input voltage is within the normal range. Or seek help from us.
Eps Over LoadcriticalCall your installer
Manual (PDF)
Over load in off grid mode.
Likely cause
Exceeding EPS load limits.
What to do
Please check if the eps load power exceeds the limit. Or seek for help from us.
Grid Lost FaultcriticalCall your installer
Manual (PDF)
Grid is lost.
Likely cause
Utility is down.
What to do
System will reconnect if the utility is back to normal. Or seek help from us, if not go back to normal state.
Ground FaultcriticalCall your installer
Manual (PDF)
The ground connection is failed.
Likely cause
Potential wiring issue.
What to do
Check the voltage of neutral and PE. Check AC wiring. Disconnect PV, grid, and battery, then reconnect. Or seek help from us if not go back to normal state.
Iso FaultcriticalCall your installer
Manual (PDF)
The isolation is failed.
Likely cause
Possible insulation failure.
What to do
Please check if the insulation of electric wires is damaged. Wait for a while to check if back to normal. Or seek for help from us.
Over Load FaultcriticalCall your installer
Manual (PDF)
Over load in on grid mode.
Likely cause
Exceeding load limits.
What to do
Please check if the load power exceeds the limit. Or seek for help from us.
10min Volt FaultwarningCall your installer
Manual (PDF)
The grid voltage is out of range for the last 10 minutes.
Likely cause
Persistent voltage fluctuation.
What to do
System will reconnect if the utility is back to normal. Or seek help from us, if not go back to normal state.
Bat Power LowwarningCall your installer
Manual (PDF)
The battery power is low.
Likely cause
Battery discharges too low.
What to do
Wait the battery to be recharged. Or seek for help from us.
DCI FaultwarningCall your installer
Manual (PDF)
DC component is out of limit in output current.
Likely cause
Possible electrical fault.
What to do
Disconnect PV, grid, and battery, then reconnect.
Grid Freq FaultwarningCall your installer
Manual (PDF)
Grid frequency out of range.
Likely cause
Frequency fluctuation in the grid.
What to do
System will reconnect if the utility is back to normal. Or seek help from us, if not go back to normal state.
Grid Volt FaultwarningCall your installer
Manual (PDF)
Grid voltage out of range.
Likely cause
Voltage fluctuation in the grid.
What to do
System will reconnect if the utility is back to normal. Or seek help from us, if not go back to normal state.
HW Inv Cur FaultwarningCall your installer
Manual (PDF)
Output current high detected by hardware.
Likely cause
Possible overload or hardware malfunction.
What to do
Disconnect PV, grid, and battery, then reconnect.
Pv Volt FaultwarningCall your installer
Manual (PDF)
PV voltage out of range.
Likely cause
Issue with PV panel output.
What to do
Please check the output voltage of PV panels. Or seek for help from us.
Res Cur FaultwarningCall your installer
Manual (PDF)
The residual current is high.
Likely cause
Potential short circuit or electrical fault.
What to do
Please check if the insulation of electric wires is damaged. Wait for a while to check if back to normal. Or seek for help from us.
SW Bat Cur FaultwarningCall your installer
Manual (PDF)
Battery current high detected by software.
Likely cause
Possible battery overload.
What to do
Disconnect PV, grid, and battery, then reconnect.
SW Bus Vol FaultwarningCall your installer
Manual (PDF)
Bus voltage out of range detected by software.
Likely cause
Electrical anomaly.
What to do
Disconnect PV, grid, and battery, then reconnect.
SW Inv Cur FaultwarningCall your installer
Manual (PDF)
Output current high detected by software.
Likely cause
Possible overload or software issue.
What to do
Disconnect PV, grid, and battery, then reconnect.
SW Pv Cur FaultwarningCall your installer
Manual (PDF)
PV input current high detected by software.
Likely cause
Possible overload on PV input.
What to do
Disconnect PV, grid, and battery, then reconnect.
Temp FaultwarningCall your installer
Manual (PDF)
The inverter temperature is high.
Likely cause
Inadequate cooling or extreme environment.
What to do
Please check if the environment temperature is appropriate. Wait for a while to check if back to normal. Or seek for help from us.

Part of the FoxESS KH series

Compare every FoxESS KH variant side by side →

More FOXESS CO LTD Inverters

1K5-1P-HI-10.5 (AS4777-2 2020)

10.5 kW · 1φ

1K5-1P-HI-10 (AS4777-2 2020)

10 kW · 1φ

1K5-1P-HI-3.7 (AS4777-2 2020)

3.68 kW · 1φ

1K5-1P-HI-4.6 (AS4777-2 2020)

4.6 kW · 1φ

1K5-1P-HI-5 (AS4777-2 2020)

5 kW · 1φ

1K5-1P-HI-6 (AS4777-2 2020)

6 kW · 1φ

View all FOXESS CO LTD inverters

More from FOXESS CO LTD

Other CEC-approved products from FOXESS CO LTD available in Australia.

FOXESS CO LTD Batteries

1K5-BAT-4660-L2

9.32 kWh · LFP

1K5-BAT-4660-L3

13.98 kWh · LFP

1K5-BAT-4660-L4

18.64 kWh · LFP

1K5-BAT-4660-L5

23.3 kWh · LFP

1K5-BAT-4660-L6

27.96 kWh · LFP

1K5-BAT-4660-L7

32.61 kWh · LFP

View all FOXESS CO LTD batteries

View full FOXESS 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.

Hybrid inverter · FoxESS · KH series · CEC approved June 2025

FoxESS KH9

CEC listing: KH9 (AS4777-2 2020)

A 9 kW single-phase hybrid inverter that is battery-ready.

Installed in Perth, typical: ~$4,275; Estimate for the inverter alone — your quote will vary
Rated power: 9kW; How much solar it can run at once
Battery-ready: Yes; Hybrid: a battery plugs straight in, no second box

Datasheet (PDF)Compare inverters See the whole KH series

Spotted something outdated?

What we can tell you

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

It is a hybrid inverter: solar and a battery run from the one unit, so adding a battery later doesn't need a second box.
It runs on a standard single-phase supply.
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: 9kW
Phases Runs on a standard single-phase supply: Single
Type Runs solar and a battery from one unit: Hybrid
Warranty How long FOXESS CO LTD stands behind it: 5yr

Full datasheet

Every figure on file for the FoxESS KH9, by section.

Full datasheet, by section
Specification	Value
Physical
IP rating	IP65
Installation requirements
AC breaker	80 A
Cable gauge	16 mm²

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

Yes

Backup capable

Yes

CEC approval details

CEC approved

13 June 2025

Approval expiry

13 June 2028

Status

Active

Eligible for rebates

Yes

About FOXESS CO LTD

Years in AU Market

7 years

Australian Office

Yes

CEC-Approved Batteries

116

CEC-Approved Panels

What it costs in Perth

Typical installed, inverter only

$3,150–$5,400

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: 38.3 kWh
Annual yield: 13,961 kWh

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

Australian office

Has local presence

Website

au.fox-ess.com

7 years in Australian market

How it compares

The FoxESS KH9 against the closest-power inverters from other brands.

Specification	FoxESS KH9FoxESS	Energizer Force 9.0HS+Energizer	Energizer Force 9.0SEnergizer

Rated power?	9 kW	9 kW	9 kW
Max efficiency?	0.0%	0.0%	0.0%
MPPT trackers?	Not verified	Not verified	Not verified

Phases	Single-phase	Single-phase	Single-phase
Type	Hybrid	Hybrid	Solar
Battery ready	Yes	Yes	No
Warranty	5 years	Not verified	Not verified

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

Documents

5-year inverter warranty

FoxESS KH9

This warranty covers defects in materials and workmanship for five years, and allows transfer to a new owner. Common exclusions include improper installation and environmental conditions.

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

Coverage shape: Pro-rata — value reduces with age
If you sell the home: Transfers to the next homeowner
What voids it: The warranty is void if the inverter is installed by non-accredited installers, modified, or used outside the specified operating parameters.
Environment limits: The warranty does not cover damages caused by extreme climates such as salt exposure, excessive heat, or flooding.

Read the official warranty document (PDF)

Fault & error codes — FoxESS KH9

From the install manual

19 documented

Showing 19 of 19. The official install manual is the authoritative source — always confirm before acting.

Bat Volt FaultcriticalCall your installer
Manual (PDF)
Battery voltage fault.
Likely cause
Battery issue or wrong voltage range.
What to do
Check if the battery input voltage is within the normal range. Or seek help from us.
Eps Over LoadcriticalCall your installer
Manual (PDF)
Over load in off grid mode.
Likely cause
Exceeding EPS load limits.
What to do
Please check if the eps load power exceeds the limit. Or seek for help from us.
Grid Lost FaultcriticalCall your installer
Manual (PDF)
Grid is lost.
Likely cause
Utility is down.
What to do
System will reconnect if the utility is back to normal. Or seek help from us, if not go back to normal state.
Ground FaultcriticalCall your installer
Manual (PDF)
The ground connection is failed.
Likely cause
Potential wiring issue.
What to do
Check the voltage of neutral and PE. Check AC wiring. Disconnect PV, grid, and battery, then reconnect. Or seek help from us if not go back to normal state.
Iso FaultcriticalCall your installer
Manual (PDF)
The isolation is failed.
Likely cause
Possible insulation failure.
What to do
Please check if the insulation of electric wires is damaged. Wait for a while to check if back to normal. Or seek for help from us.
Over Load FaultcriticalCall your installer
Manual (PDF)
Over load in on grid mode.
Likely cause
Exceeding load limits.
What to do
Please check if the load power exceeds the limit. Or seek for help from us.
10min Volt FaultwarningCall your installer
Manual (PDF)
The grid voltage is out of range for the last 10 minutes.
Likely cause
Persistent voltage fluctuation.
What to do
System will reconnect if the utility is back to normal. Or seek help from us, if not go back to normal state.
Bat Power LowwarningCall your installer
Manual (PDF)
The battery power is low.
Likely cause
Battery discharges too low.
What to do
Wait the battery to be recharged. Or seek for help from us.
DCI FaultwarningCall your installer
Manual (PDF)
DC component is out of limit in output current.
Likely cause
Possible electrical fault.
What to do
Disconnect PV, grid, and battery, then reconnect.
Grid Freq FaultwarningCall your installer
Manual (PDF)
Grid frequency out of range.
Likely cause
Frequency fluctuation in the grid.
What to do
System will reconnect if the utility is back to normal. Or seek help from us, if not go back to normal state.
Grid Volt FaultwarningCall your installer
Manual (PDF)
Grid voltage out of range.
Likely cause
Voltage fluctuation in the grid.
What to do
System will reconnect if the utility is back to normal. Or seek help from us, if not go back to normal state.
HW Inv Cur FaultwarningCall your installer
Manual (PDF)
Output current high detected by hardware.
Likely cause
Possible overload or hardware malfunction.
What to do
Disconnect PV, grid, and battery, then reconnect.
Pv Volt FaultwarningCall your installer
Manual (PDF)
PV voltage out of range.
Likely cause
Issue with PV panel output.
What to do
Please check the output voltage of PV panels. Or seek for help from us.
Res Cur FaultwarningCall your installer
Manual (PDF)
The residual current is high.
Likely cause
Potential short circuit or electrical fault.
What to do
Please check if the insulation of electric wires is damaged. Wait for a while to check if back to normal. Or seek for help from us.
SW Bat Cur FaultwarningCall your installer
Manual (PDF)
Battery current high detected by software.
Likely cause
Possible battery overload.
What to do
Disconnect PV, grid, and battery, then reconnect.
SW Bus Vol FaultwarningCall your installer
Manual (PDF)
Bus voltage out of range detected by software.
Likely cause
Electrical anomaly.
What to do
Disconnect PV, grid, and battery, then reconnect.
SW Inv Cur FaultwarningCall your installer
Manual (PDF)
Output current high detected by software.
Likely cause
Possible overload or software issue.
What to do
Disconnect PV, grid, and battery, then reconnect.
SW Pv Cur FaultwarningCall your installer
Manual (PDF)
PV input current high detected by software.
Likely cause
Possible overload on PV input.
What to do
Disconnect PV, grid, and battery, then reconnect.
Temp FaultwarningCall your installer
Manual (PDF)
The inverter temperature is high.
Likely cause
Inadequate cooling or extreme environment.
What to do
Please check if the environment temperature is appropriate. Wait for a while to check if back to normal. Or seek for help from us.

Part of the FoxESS KH series

Compare every FoxESS KH variant side by side →

More FOXESS CO LTD Inverters

1K5-1P-HI-10.5 (AS4777-2 2020)

10.5 kW · 1φ

1K5-1P-HI-10 (AS4777-2 2020)

10 kW · 1φ

1K5-1P-HI-3.7 (AS4777-2 2020)

3.68 kW · 1φ

1K5-1P-HI-4.6 (AS4777-2 2020)

4.6 kW · 1φ

1K5-1P-HI-5 (AS4777-2 2020)

5 kW · 1φ

1K5-1P-HI-6 (AS4777-2 2020)

6 kW · 1φ

View all FOXESS CO LTD inverters