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Product specifications, pricing, and availability are subject to change without notice. We make no warranties regarding product performance, longevity, or suitability for your specific needs.

Always verify specifications with the manufacturer and installer before purchase. Warranty terms are set by manufacturers and may have conditions not disclosed here. Battery performance degrades over time.

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CEC approved: Jan 2024Report outdated info

FOXESS ECS2900-H4

Name: FOXESS ECS2900-H4
Brand: FOXESS

ECS2900 series

CEC Approved

View datasheet (PDF)

Part of ECS2900 — see all configurations

Usable capacity: 11.52 kWh
Continuous power: 5.76 kW
Peak power: 6.91 kW
Round-trip efficiency: 95%
Warranty: 5 yr
Chemistry: LFP(LiFePO4)

Our verdict

The Fox ESS ECS is a modular battery system designed for smooth integration with Fox inverters. Australian 1300 support line and growing installer network make it a solid mid-range choice.

What we like

Modular 2.6kWh modules - scale to 26kWh
Australian 1300 support line
Smooth Fox inverter integration
Good value for mid-range budget
Growing Australian presence

What could be better

Optimised for use with Fox inverters
Brand still building Australian reputation
Growing Australian installer network
Relatively new to Australian market (2021)

Who should buy it

Those with Fox ESS inverters
Mid-range capacity buyers
Homeowners wanting scalable capacity
Installers recommending Fox systems

Full specifications

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.

Cell & chemistry

Chemistry: LFP(LiFePO4)
Cell type: CM2900,CS2900

Capacity & power

Nominal capacity: 11.52 kWh
Usable capacity: 11.52 kWh
Continuous power: 5.76 kW
Peak power: 6.91 kW
Depth of discharge: 90%
Round-trip efficiency: 95%
Nominal voltage: 230.4 V

Lifespan & degradation

Cycle life: 6000 cycles

Modularity & stacking

Modular / stackable: Yes
Maximum stack: 20.16 kWh

Backup & grid services

Backup capable: No
VPP ready: No

Physical

Dimensions (H×W×D): 570 × 590 × 380 mm
Weight: 132.3 kg
IP rating: IP65

Operating environment

Operating temperature: -10°C to 55°C

Resources

Datasheet Warranty terms Installation guide

Warranty and support

Warranty terms and Australian support structure.

This warranty covers defects and performance issues in Fox battery products for up to 60 months, provided the product is installed correctly and maintained. Claims can be made through the installer, but exclusions apply for improper installation and maintenance.

Duration

years

Throughput

∞

MWh

Max Temp

55°

celsius

Max Backup

Level 0

No Backup

Australian support structure

Australian Office7 years in AU market

FoxESS Australia

Direct manufacturer warranty. Australian consumer law applies.

Perth climate suitability

Suited to Perth climate

Rated to 55°C, which covers Perth's hottest days.

Key warranty terms

•Depth of Discharge: 90% usable capacity
•Round-trip Efficiency: 95% rated
•Annual Degradation: ~2.5% per year expected
•Installation: Must be installed by SAA-accredited installer
•Operating Conditions: -10°C to 55°C

✓ TransferableFull replacement

Warranty Document Datasheet Compare Warranties

WA Battery Scheme eligibility

Likely eligible

Synergy SSL inverter pairing, VPP participation and state-rebate qualification for this battery. Rebate and STC amounts are shown in the pricing panel.

CSIP-AUS compliant
Inverter must be CSIP-AUS compliant under the current WA framework.
Synergy SSL approved inverter
Pairs with FOXESS CO LTD H3-PRO.
VPP activation ready
Ready for Synergy VPP participation.
WA Battery Scheme rebate
Up to $1,300 for Synergy customers (10kWh max eligible).
Synergy Battery Rewards
Requires a CSIP-AUS compliant system and reliable internet.
Interest-free loan
Qualifies for up to $10,000 interest-free.

Under current WA rules, new rebate applications require VPP enrolment and CSIP-AUS compliance. How the scheme works · Estimate VPP earnings

About FOXESS

View Full Profile →

Years in AU Market7+ years

Local SupportNot verified

CEC-Listed Products116 models

7yr AU

CEC-approved products since 2019

7 years in the Australian market

Fault & error codes — FOXESS ECS2900

Extracted from the installation manual

30 documented

Showing 30 of 30. The official install manual is the authoritative source — always confirm before acting.

AFE failed (UV/OV/UT/OT)criticalCall your installer
Manual (PDF)
AFE detected an unrecoverable fault.
Likely cause
Serious internal fault.
What to do
Urgently contact support for immediate assistance.
HVB FUSE faultcriticalCall your installer
Manual (PDF)
High Voltage Bus fuse has blown.
Likely cause
Overcurrent condition or equipment failure.
What to do
Check and replace the fuse after diagnosing the issue.
Module FUSE faultcriticalCall your installer
Manual (PDF)
Fuse in the battery module has blown.
Likely cause
Excessive load or failure in the module.
What to do
Check and replace the fuse and inspect for failure.
Over temperature faultcriticalCall your installer
Manual (PDF)
Battery temperature is too high.
Likely cause
Excessive ambient temperature or charging conditions.
What to do
Ensure proper ventilation and cooling for the battery.
Over voltage faultcriticalCall your installer
Manual (PDF)
Battery voltage is too high.
Likely cause
Improper charging or faulty equipment.
What to do
Disconnect the charging equipment and check the system.
Power failedcriticalCall your installer
Manual (PDF)
Power supply to the system has failed.
Likely cause
Electrical issue or failure of power source.
What to do
Check the power supply and restore connections.
Short circuit ProtectioncriticalCall your installer
Manual (PDF)
A short circuit has been detected.
Likely cause
Electrical fault in connected wiring or devices.
What to do
Stop using the device immediately and inspect wiring.
Shutdown failedcriticalCall your installer
Manual (PDF)
Shutdown procedure did not complete successfully.
Likely cause
Control system failure.
What to do
Contact support to diagnose the issue.
Single Cell '0V' faultcriticalCall your installer
Manual (PDF)
One or more battery cells is at zero voltage.
Likely cause
Cell failure or excessive discharge.
What to do
Inspect battery cells immediately or replace if necessary.
SOH low protectioncriticalCall your installer
Manual (PDF)
State of Health is too low for safe operation.
Likely cause
Battery degradation or aging.
What to do
Contact support for assessment of battery health.
Temperature high permanent failedcriticalCall your installer
Manual (PDF)
Permanent high temperature condition detected.
Likely cause
Continuous exposure to high temperatures.
What to do
Cool down the system and check for damage.
The Single voltage high permanently failedcriticalCall your installer
Manual (PDF)
Voltage of a single cell is too high permanently.
Likely cause
Cell malfunction or electrical fault.
What to do
Inspect and replace the faulty cell.
Under voltage faultcriticalCall your installer
Manual (PDF)
Battery voltage is too low.
Likely cause
Battery has been excessively discharged.
What to do
Charge the battery immediately or contact support.
AFE communication failedwarningCall your installer
Manual (PDF)
Communication failure with the AFE system.
Likely cause
Fault in wiring or the AFE system.
What to do
Inspect the system for loose or damaged connections.
BMU Communication failedwarningCall your installer
Manual (PDF)
Battery Management Unit communication has failed.
Likely cause
Faulty wiring or defective BMU.
What to do
Inspect connections and check BMU functionality.
Charge over currentwarningCall your installer
Manual (PDF)
Battery is being charged with too much current.
Likely cause
Incompatible charger settings or malfunctioning charger.
What to do
Stop charging and check equipment compatibility.
Charge over powerwarningCall your installer
Manual (PDF)
Battery is being charged with too much power.
Likely cause
Charger settings are improperly configured.
What to do
Check charger settings and adjust as necessary.
Discharge over currentwarning
Manual (PDF)
Battery is delivering too much current.
Likely cause
Excessive load connected to the battery.
What to do
Reduce load or disconnect devices immediately.
Discharge over powerwarning
Manual (PDF)
Battery is exceeding power delivery capacity.
Likely cause
Connected devices exceed battery discharge specifications.
What to do
Disconnect excess load or devices from the battery.
Internal total voltage sampling failedwarningCall your installer
Manual (PDF)
Failure in internal voltage measurements.
Likely cause
Component failure inside the battery.
What to do
Contact support for internal inspection.
IVU Communication failedwarningCall your installer
Manual (PDF)
Communication failure with the IVU.
Likely cause
Electrical failure or wiring issue.
What to do
Check connections and try restarting the system.
Module Addressing failedwarningCall your installer
Manual (PDF)
Failure in battery module addressing.
Likely cause
Improper module setup or internal failure.
What to do
Reset the system and check module configurations.
Other faultwarningCall your installer
Manual (PDF)
An unspecified fault has occurred.
Likely cause
Various potential underlying issues.
What to do
Monitor the system and contact support if it persists.
PCS Communication failedwarningCall your installer
Manual (PDF)
Communication failure with the Power Control System.
Likely cause
Faulty connections or PCS malfunction.
What to do
Verify wiring and restart PCS if needed.
Pre-Charge failedwarningCall your installer
Manual (PDF)
Initial charging sequence has failed.
Likely cause
Faulty charger or malfunctioning battery.
What to do
Check the charger and attempt to recharge again.
Relay adhesionwarningCall your installer
Manual (PDF)
Relay has stuck in the ON position.
Likely cause
Mechanical failure of the relay.
What to do
Inspect and repair or replace the relay.
Relay drive failedwarningCall your installer
Manual (PDF)
Failure in the relay drive mechanism.
Likely cause
Electrical or mechanical fault.
What to do
Inspect the relay and connections.
Relay Not ClosewarningCall your installer
Manual (PDF)
Relay is not closing properly.
Likely cause
Faulty relay or connection issue.
What to do
Examine the relay for functionality.
Temperature sampling failedwarningCall your installer
Manual (PDF)
Temperature sensors are not functioning correctly.
Likely cause
Fault in sensor or wiring fault.
What to do
Check sensor connections and replace if damaged.
Under temperature faultwarning
Manual (PDF)
Battery temperature is too low.
Likely cause
Battery is operating under extreme cold conditions.
What to do
Warm the battery to a suitable temperature before using it.

Perth pricing

Typical installed price

$8,500

WA State Rebate-$1,300

Federal STCs-$3,112

After Rebates~$4,088

Prices are estimates. Final pricing depends on installation requirements. STC value is based on the current certificate price of about $39.9.

Explore your options

Insufficient Data for Scoring

3 of 5 critical specs available (need 4)

Part of the FOXESS ECS2900

See all configurations in this series →

Compare options

Compare this battery with other models to find the best fit for your needs.

Compare Products

Frequently asked questions

How it compares

The FOXESS ECS2900-H4 against the closest-sized batteries from other brands.

Specification	FOXESS ECS2900-H4FOXESS	Energizer PS2900H-4Energizer	Solplanet Ai-HB 125ASolplanet

Usable capacity?	11.52 kWh	11.52 kWh	11.52 kWh
Continuous power?	5.76 kW	Not verified	Not verified
Peak power?	6.91 kW	Not verified	Not verified

Round-trip efficiency?	95%best value	92%	92%
Warranty	5 years	10 yearsbest value	10 yearsbest value
Chemistry	LFP(LiFePO4)	LFP	LFP

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

Compatible Inverters

CEC-approved inverters compatible with FOXESS batteries.

FoxESS

H1-5.0-E-G2 (AS4777-2 2020)

5 kWhybrid

FoxESS

H1-3.7-E-G2 (AS4777-2 2020)

3.68 kWhybrid

FoxESS

H3-5.0-Smart (AS4777-2 2020)

5 kWhybrid

FoxESS

H3-10.0-Smart (AS4777-2 2020)

10 kWhybrid

FOXESS ECS2900-H4

ECS2900 series

CEC Approved

View datasheet (PDF)

Part of ECS2900 — see all configurations

Usable capacity: 11.52 kWh
Continuous power: 5.76 kW
Peak power: 6.91 kW
Round-trip efficiency: 95%
Warranty: 5 yr
Chemistry: LFP(LiFePO4)

Our verdict

The Fox ESS ECS is a modular battery system designed for smooth integration with Fox inverters. Australian 1300 support line and growing installer network make it a solid mid-range choice.

What we like

Modular 2.6kWh modules - scale to 26kWh
Australian 1300 support line
Smooth Fox inverter integration
Good value for mid-range budget
Growing Australian presence

What could be better

Optimised for use with Fox inverters
Brand still building Australian reputation
Growing Australian installer network
Relatively new to Australian market (2021)

Who should buy it

Those with Fox ESS inverters
Mid-range capacity buyers
Homeowners wanting scalable capacity
Installers recommending Fox systems

Full specifications

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.

Cell & chemistry

Chemistry: LFP(LiFePO4)
Cell type: CM2900,CS2900

Capacity & power

Nominal capacity: 11.52 kWh
Usable capacity: 11.52 kWh
Continuous power: 5.76 kW
Peak power: 6.91 kW
Depth of discharge: 90%
Round-trip efficiency: 95%
Nominal voltage: 230.4 V

Lifespan & degradation

Cycle life: 6000 cycles

Modularity & stacking

Modular / stackable: Yes
Maximum stack: 20.16 kWh

Backup & grid services

Backup capable: No
VPP ready: No

Physical

Dimensions (H×W×D): 570 × 590 × 380 mm
Weight: 132.3 kg
IP rating: IP65

Operating environment

Operating temperature: -10°C to 55°C

Resources

Datasheet Warranty terms Installation guide

Warranty and support

Warranty terms and Australian support structure.

Duration

years

Throughput

∞

MWh

Max Temp

55°

celsius

Max Backup

Level 0

No Backup

Australian support structure

Australian Office7 years in AU market

FoxESS Australia

Direct manufacturer warranty. Australian consumer law applies.

Perth climate suitability

Suited to Perth climate

Rated to 55°C, which covers Perth's hottest days.

Key warranty terms

•Depth of Discharge: 90% usable capacity
•Round-trip Efficiency: 95% rated
•Annual Degradation: ~2.5% per year expected
•Installation: Must be installed by SAA-accredited installer
•Operating Conditions: -10°C to 55°C

✓ TransferableFull replacement

Warranty Document Datasheet Compare Warranties

WA Battery Scheme eligibility

Likely eligible

Synergy SSL inverter pairing, VPP participation and state-rebate qualification for this battery. Rebate and STC amounts are shown in the pricing panel.

CSIP-AUS compliant
Inverter must be CSIP-AUS compliant under the current WA framework.
Synergy SSL approved inverter
Pairs with FOXESS CO LTD H3-PRO.
VPP activation ready
Ready for Synergy VPP participation.
WA Battery Scheme rebate
Up to $1,300 for Synergy customers (10kWh max eligible).
Synergy Battery Rewards
Requires a CSIP-AUS compliant system and reliable internet.
Interest-free loan
Qualifies for up to $10,000 interest-free.

Under current WA rules, new rebate applications require VPP enrolment and CSIP-AUS compliance. How the scheme works · Estimate VPP earnings

About FOXESS

View Full Profile →

Years in AU Market7+ years

Local SupportNot verified

CEC-Listed Products116 models

7yr AU

CEC-approved products since 2019

7 years in the Australian market

Fault & error codes — FOXESS ECS2900

Extracted from the installation manual

30 documented

Showing 30 of 30. The official install manual is the authoritative source — always confirm before acting.

AFE failed (UV/OV/UT/OT)criticalCall your installer
Manual (PDF)
AFE detected an unrecoverable fault.
Likely cause
Serious internal fault.
What to do
Urgently contact support for immediate assistance.
HVB FUSE faultcriticalCall your installer
Manual (PDF)
High Voltage Bus fuse has blown.
Likely cause
Overcurrent condition or equipment failure.
What to do
Check and replace the fuse after diagnosing the issue.
Module FUSE faultcriticalCall your installer
Manual (PDF)
Fuse in the battery module has blown.
Likely cause
Excessive load or failure in the module.
What to do
Check and replace the fuse and inspect for failure.
Over temperature faultcriticalCall your installer
Manual (PDF)
Battery temperature is too high.
Likely cause
Excessive ambient temperature or charging conditions.
What to do
Ensure proper ventilation and cooling for the battery.
Over voltage faultcriticalCall your installer
Manual (PDF)
Battery voltage is too high.
Likely cause
Improper charging or faulty equipment.
What to do
Disconnect the charging equipment and check the system.
Power failedcriticalCall your installer
Manual (PDF)
Power supply to the system has failed.
Likely cause
Electrical issue or failure of power source.
What to do
Check the power supply and restore connections.
Short circuit ProtectioncriticalCall your installer
Manual (PDF)
A short circuit has been detected.
Likely cause
Electrical fault in connected wiring or devices.
What to do
Stop using the device immediately and inspect wiring.
Shutdown failedcriticalCall your installer
Manual (PDF)
Shutdown procedure did not complete successfully.
Likely cause
Control system failure.
What to do
Contact support to diagnose the issue.
Single Cell '0V' faultcriticalCall your installer
Manual (PDF)
One or more battery cells is at zero voltage.
Likely cause
Cell failure or excessive discharge.
What to do
Inspect battery cells immediately or replace if necessary.
SOH low protectioncriticalCall your installer
Manual (PDF)
State of Health is too low for safe operation.
Likely cause
Battery degradation or aging.
What to do
Contact support for assessment of battery health.
Temperature high permanent failedcriticalCall your installer
Manual (PDF)
Permanent high temperature condition detected.
Likely cause
Continuous exposure to high temperatures.
What to do
Cool down the system and check for damage.
The Single voltage high permanently failedcriticalCall your installer
Manual (PDF)
Voltage of a single cell is too high permanently.
Likely cause
Cell malfunction or electrical fault.
What to do
Inspect and replace the faulty cell.
Under voltage faultcriticalCall your installer
Manual (PDF)
Battery voltage is too low.
Likely cause
Battery has been excessively discharged.
What to do
Charge the battery immediately or contact support.
AFE communication failedwarningCall your installer
Manual (PDF)
Communication failure with the AFE system.
Likely cause
Fault in wiring or the AFE system.
What to do
Inspect the system for loose or damaged connections.
BMU Communication failedwarningCall your installer
Manual (PDF)
Battery Management Unit communication has failed.
Likely cause
Faulty wiring or defective BMU.
What to do
Inspect connections and check BMU functionality.
Charge over currentwarningCall your installer
Manual (PDF)
Battery is being charged with too much current.
Likely cause
Incompatible charger settings or malfunctioning charger.
What to do
Stop charging and check equipment compatibility.
Charge over powerwarningCall your installer
Manual (PDF)
Battery is being charged with too much power.
Likely cause
Charger settings are improperly configured.
What to do
Check charger settings and adjust as necessary.
Discharge over currentwarning
Manual (PDF)
Battery is delivering too much current.
Likely cause
Excessive load connected to the battery.
What to do
Reduce load or disconnect devices immediately.
Discharge over powerwarning
Manual (PDF)
Battery is exceeding power delivery capacity.
Likely cause
Connected devices exceed battery discharge specifications.
What to do
Disconnect excess load or devices from the battery.
Internal total voltage sampling failedwarningCall your installer
Manual (PDF)
Failure in internal voltage measurements.
Likely cause
Component failure inside the battery.
What to do
Contact support for internal inspection.
IVU Communication failedwarningCall your installer
Manual (PDF)
Communication failure with the IVU.
Likely cause
Electrical failure or wiring issue.
What to do
Check connections and try restarting the system.
Module Addressing failedwarningCall your installer
Manual (PDF)
Failure in battery module addressing.
Likely cause
Improper module setup or internal failure.
What to do
Reset the system and check module configurations.
Other faultwarningCall your installer
Manual (PDF)
An unspecified fault has occurred.
Likely cause
Various potential underlying issues.
What to do
Monitor the system and contact support if it persists.
PCS Communication failedwarningCall your installer
Manual (PDF)
Communication failure with the Power Control System.
Likely cause
Faulty connections or PCS malfunction.
What to do
Verify wiring and restart PCS if needed.
Pre-Charge failedwarningCall your installer
Manual (PDF)
Initial charging sequence has failed.
Likely cause
Faulty charger or malfunctioning battery.
What to do
Check the charger and attempt to recharge again.
Relay adhesionwarningCall your installer
Manual (PDF)
Relay has stuck in the ON position.
Likely cause
Mechanical failure of the relay.
What to do
Inspect and repair or replace the relay.
Relay drive failedwarningCall your installer
Manual (PDF)
Failure in the relay drive mechanism.
Likely cause
Electrical or mechanical fault.
What to do
Inspect the relay and connections.
Relay Not ClosewarningCall your installer
Manual (PDF)
Relay is not closing properly.
Likely cause
Faulty relay or connection issue.
What to do
Examine the relay for functionality.
Temperature sampling failedwarningCall your installer
Manual (PDF)
Temperature sensors are not functioning correctly.
Likely cause
Fault in sensor or wiring fault.
What to do
Check sensor connections and replace if damaged.
Under temperature faultwarning
Manual (PDF)
Battery temperature is too low.
Likely cause
Battery is operating under extreme cold conditions.
What to do
Warm the battery to a suitable temperature before using it.

Perth pricing

Typical installed price

$8,500

WA State Rebate-$1,300

Federal STCs-$3,112

After Rebates~$4,088

Prices are estimates. Final pricing depends on installation requirements. STC value is based on the current certificate price of about $39.9.

Explore your options

Insufficient Data for Scoring

3 of 5 critical specs available (need 4)

Part of the FOXESS ECS2900

See all configurations in this series →

Compare options

Compare this battery with other models to find the best fit for your needs.

Compare Products

Frequently asked questions

How it compares

The FOXESS ECS2900-H4 against the closest-sized batteries from other brands.

Specification	FOXESS ECS2900-H4FOXESS	Energizer PS2900H-4Energizer	Solplanet Ai-HB 125ASolplanet

Usable capacity?	11.52 kWh	11.52 kWh	11.52 kWh
Continuous power?	5.76 kW	Not verified	Not verified
Peak power?	6.91 kW	Not verified	Not verified

Round-trip efficiency?	95%best value	92%	92%
Warranty	5 years	10 yearsbest value	10 yearsbest value
Chemistry	LFP(LiFePO4)	LFP	LFP

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

Compatible Inverters

CEC-approved inverters compatible with FOXESS batteries.

FoxESS

H1-5.0-E-G2 (AS4777-2 2020)

5 kWhybrid

FoxESS

H1-3.7-E-G2 (AS4777-2 2020)

3.68 kWhybrid

FoxESS

H3-5.0-Smart (AS4777-2 2020)

5 kWhybrid

FoxESS

H3-10.0-Smart (AS4777-2 2020)

10 kWhybrid

FOXESS ECS2900-H4

Our verdict

What we like

What could be better

Who should buy it

Full specifications

Cell & chemistry

Capacity & power

Lifespan & degradation

Modularity & stacking

Backup & grid services

Physical

Operating environment

Australian support structure

Perth climate suitability

Key warranty terms

Fault & error codes — FOXESS ECS2900

Frequently asked questions

How it compares

Compatible Inverters

More from FOXESS

FOXESS Inverters

Want to take the next step?

FOXESS ECS2900-H4

Our verdict

What we like

What could be better

Who should buy it

Full specifications

Cell & chemistry

Capacity & power

Lifespan & degradation

Modularity & stacking

Backup & grid services

Physical

Operating environment

Australian support structure

Perth climate suitability

Key warranty terms

Fault & error codes — FOXESS ECS2900

Frequently asked questions

How it compares

Compatible Inverters

More from FOXESS

FOXESS Inverters

Want to take the next step?