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Hybrid inverter · Alpha ESS · SMILE-S5 series · CEC approved March 2026

Alpha ESS SMILE-S5 III

CEC listing: SMILE-S5 III (AS4777-2 2020)

A 5 kW single-phase hybrid inverter that is battery-ready.

Installed in Perth, typical: ~$2,375; Estimate for the inverter alone — your quote will vary
Rated power: 5kW; 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 SMILE-S5 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: 5kW
Phases Runs on a standard single-phase supply: Single
Type Runs solar and a battery from one unit: Hybrid
Warranty How long Alpha ESS Co Ltd stands behind it: 5yr

Full datasheet

Every figure on file for the Alpha ESS SMILE-S5 III, by section.

Full datasheet, by section
Specification	Value
Power & output
Nominal power	5 kW
Physical
Dimensions (H×W×D)	250 × 640 × 745 mm
Weight	75 kg
IP rating	IP65
Installation requirements
Top clearance	200 mm
Side clearance	150 mm
AC breaker	40 A
Cable gauge	6 mm²
Earthing method	TN-S
DNSP pre-approval	No
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

Yes

Backup capable

Yes

CEC approval details

CEC approved

5 Mar 2026

Approval expiry

12 Oct 2027

Status

Active

Eligible for rebates

Yes

About Alpha ESS Co Ltd

Years in AU Market

9 years

Australian Office

Yes

CEC-Approved Batteries

CEC-Approved Panels

What it costs in Perth

Typical installed, inverter only

$1,750–$3,000

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: 21.3 kWh
Annual yield: 7,756 kWh

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

Australian office

Has local presence

Website

alphaess.au

9 years in Australian market

How it compares

The Alpha ESS SMILE-S5 III against the closest-power inverters from other brands.

Specification	Alpha ESS SMILE-S5 IIIAlpha ESS	Energizer FORCE 5.0HSEnergizer	Energizer Force 5.0HT+Energizer

Rated power?	5 kW	5 kW	5 kW
Max efficiency?	0.0%	0.0%	0.0%
MPPT trackers?	Not verified	Not verified	Not verified

Phases	Single-phase	Single-phase	Three-phase
Type	Hybrid	Hybrid	Hybrid
Battery ready	Yes	Yes	Yes
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

Alpha ESS SMILE-S5 III

This warranty covers the AlphaESS residential products for 5 years and ensures at least 80% capacity at year 10. Warranty claims can be made through the specified process.

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, improper operation, and incorrect maintenance void the warranty.
Environment limits: Ambient temperature must not fall below -10°C or exceed 50°C and products must not be exposed to direct sunlight.

Read the official warranty document (PDF)

Fault & error codes — Alpha ESS SMILE-S5 III

From the install manual

17 documented

Showing 17 of 17. The official install manual is the authoritative source — always confirm before acting.

100007criticalCall your installer
Manual (PDF)
Insulation fault
Likely cause
Check installation environment; may require improved conditions.
What to do
Inspect and possibly disconnect solar panel strings to locate problems.
100008criticalCall your installer
Manual (PDF)
GFCI fault
Likely cause
May indicate problems with insulation resistance; monitor closely.
What to do
Contact customer service for troubleshooting if it persists.
100027criticalCall your installer
Manual (PDF)
Battery lose
Likely cause
Wiring issues or breaker is open; check connections.
What to do
Check battery wiring and BMS communication.
100042criticalCall your installer
Manual (PDF)
Output short
Likely cause
Backup load is shorted; disconnect load and restart.
What to do
Disconnect the load and check the system.
100043criticalCall your installer
Manual (PDF)
Output overload
Likely cause
Load connected exceeds maximum output; reduce load immediately.
What to do
Reduce load and restart the inverter.
110029criticalCall your installer
Manual (PDF)
GFCI Alarm
Likely cause
Signals potential faults in the system; monitor closely.
What to do
Contact customer service if it persists.
100005warning
Manual (PDF)
BUS OVP1
Likely cause
If it happens occasionally, the inverter can recover automatically, no processing is required.
What to do
Monitor the situation; if it persists, contact customer service.
100010warningCall your installer
Manual (PDF)
Grid relay fault
Likely cause
Typically caused by short-term grid issues.
What to do
Monitor; if frequent, follow guidance for grid voltage issues.
100012warning
Manual (PDF)
PV Reverse
Likely cause
PV string connections may be reversed.
What to do
Check the connections of PV strings.
100025warningCall your installer
Manual (PDF)
Battery OVP
Likely cause
May indicate over-voltage during charging; check wiring and BMS communication.
What to do
Inspect wiring and potential loose connections.
100026warningCall your installer
Manual (PDF)
Battery UVP
Likely cause
Check battery voltage and ensure all breakers are closed.
What to do
Verify the battery status and connections.
100030warning
Manual (PDF)
Battery discharge OCP
Likely cause
Over-discharge situation; reduce backup load immediately.
What to do
Reduce load and restart the inverter.
100038warningCall your installer
Manual (PDF)
Output DC over current
Likely cause
Short-term abnormality of the power grid can cause this fault.
What to do
Monitor; if persistent, contact customer service.
100041warningCall your installer
Manual (PDF)
Output DC over voltage
Likely cause
Caused by a grid voltage issue, can often recover automatically.
What to do
Contact customer service for further check if it persists.
100046warningCall your installer
Manual (PDF)
DC Input Disturbance
Likely cause
Usually recovers automatically if it happens occasionally.
What to do
Monitor for recurrences; if persistent, contact service.
100052warningCall your installer
Manual (PDF)
Backup OVP
Likely cause
Generally recovers automatically, monitor closely.
What to do
If it continues, contact customer service.
110030warning
Manual (PDF)
ISO Alarm
Likely cause
Restart the system to see if the fault persists.
What to do
Restart and monitor the system.

Part of the Alpha ESS SMILE-S5 series

Compare every Alpha ESS SMILE-S5 variant side by side →

More Alpha ESS Co Ltd Inverters

M30-INV-AU (AS4777-2 2020)

30 kW · 3φ

M50-INV-AU (AS4777-2 2020)

50 kW · 3φ

SMILE-B3-PLUS (AS4777-2 2020)

3 kW · 1φ

SMILE-B3-PLUS II (AS4777-2 2020)

3 kW · 1φ

SMILE-B3-PLUS III (AS4777-2 2020)

3 kW · 1φ

SMILE-B3-PLUS IV (AS4777-2 2020)

3 kW · 1φ

View all Alpha ESS Co Ltd inverters

More from Alpha ESS Co Ltd

Other CEC-approved products from Alpha ESS Co Ltd available in Australia.

Alpha ESS Co Ltd Batteries

M38314-108SNW

97.61 kWh · LFP

M38314-120SNW

108.45 kWh · LFP

M38314-132SNW

119.3 kWh · LFP

M38314-144SNW

130.14 kWh · LFP

M38314-156SNW

140.99 kWh · LFP

M38314-168SNW

151.83 kWh · LFP

View all Alpha ESS Co Ltd batteries

View full Alpha ESS Co Ltd manufacturer profile

Want to take the next step?

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 · Alpha ESS · SMILE-S5 series · CEC approved March 2026

Alpha ESS SMILE-S5 III

CEC listing: SMILE-S5 III (AS4777-2 2020)

A 5 kW single-phase hybrid inverter that is battery-ready.

Installed in Perth, typical: ~$2,375; Estimate for the inverter alone — your quote will vary
Rated power: 5kW; 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 SMILE-S5 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: 5kW
Phases Runs on a standard single-phase supply: Single
Type Runs solar and a battery from one unit: Hybrid
Warranty How long Alpha ESS Co Ltd stands behind it: 5yr

Full datasheet

Every figure on file for the Alpha ESS SMILE-S5 III, by section.

Full datasheet, by section
Specification	Value
Power & output
Nominal power	5 kW
Physical
Dimensions (H×W×D)	250 × 640 × 745 mm
Weight	75 kg
IP rating	IP65
Installation requirements
Top clearance	200 mm
Side clearance	150 mm
AC breaker	40 A
Cable gauge	6 mm²
Earthing method	TN-S
DNSP pre-approval	No
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

Yes

Backup capable

Yes

CEC approval details

CEC approved

5 Mar 2026

Approval expiry

12 Oct 2027

Status

Active

Eligible for rebates

Yes

About Alpha ESS Co Ltd

Years in AU Market

9 years

Australian Office

Yes

CEC-Approved Batteries

CEC-Approved Panels

What it costs in Perth

Typical installed, inverter only

$1,750–$3,000

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: 21.3 kWh
Annual yield: 7,756 kWh

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

Australian office

Has local presence

Website

alphaess.au

9 years in Australian market

How it compares

The Alpha ESS SMILE-S5 III against the closest-power inverters from other brands.

Specification	Alpha ESS SMILE-S5 IIIAlpha ESS	Energizer FORCE 5.0HSEnergizer	Energizer Force 5.0HT+Energizer

Rated power?	5 kW	5 kW	5 kW
Max efficiency?	0.0%	0.0%	0.0%
MPPT trackers?	Not verified	Not verified	Not verified

Phases	Single-phase	Single-phase	Three-phase
Type	Hybrid	Hybrid	Hybrid
Battery ready	Yes	Yes	Yes
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

Alpha ESS SMILE-S5 III

This warranty covers the AlphaESS residential products for 5 years and ensures at least 80% capacity at year 10. Warranty claims can be made through the specified process.

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, improper operation, and incorrect maintenance void the warranty.
Environment limits: Ambient temperature must not fall below -10°C or exceed 50°C and products must not be exposed to direct sunlight.

Read the official warranty document (PDF)

Fault & error codes — Alpha ESS SMILE-S5 III

From the install manual

17 documented

Showing 17 of 17. The official install manual is the authoritative source — always confirm before acting.

100007criticalCall your installer
Manual (PDF)
Insulation fault
Likely cause
Check installation environment; may require improved conditions.
What to do
Inspect and possibly disconnect solar panel strings to locate problems.
100008criticalCall your installer
Manual (PDF)
GFCI fault
Likely cause
May indicate problems with insulation resistance; monitor closely.
What to do
Contact customer service for troubleshooting if it persists.
100027criticalCall your installer
Manual (PDF)
Battery lose
Likely cause
Wiring issues or breaker is open; check connections.
What to do
Check battery wiring and BMS communication.
100042criticalCall your installer
Manual (PDF)
Output short
Likely cause
Backup load is shorted; disconnect load and restart.
What to do
Disconnect the load and check the system.
100043criticalCall your installer
Manual (PDF)
Output overload
Likely cause
Load connected exceeds maximum output; reduce load immediately.
What to do
Reduce load and restart the inverter.
110029criticalCall your installer
Manual (PDF)
GFCI Alarm
Likely cause
Signals potential faults in the system; monitor closely.
What to do
Contact customer service if it persists.
100005warning
Manual (PDF)
BUS OVP1
Likely cause
If it happens occasionally, the inverter can recover automatically, no processing is required.
What to do
Monitor the situation; if it persists, contact customer service.
100010warningCall your installer
Manual (PDF)
Grid relay fault
Likely cause
Typically caused by short-term grid issues.
What to do
Monitor; if frequent, follow guidance for grid voltage issues.
100012warning
Manual (PDF)
PV Reverse
Likely cause
PV string connections may be reversed.
What to do
Check the connections of PV strings.
100025warningCall your installer
Manual (PDF)
Battery OVP
Likely cause
May indicate over-voltage during charging; check wiring and BMS communication.
What to do
Inspect wiring and potential loose connections.
100026warningCall your installer
Manual (PDF)
Battery UVP
Likely cause
Check battery voltage and ensure all breakers are closed.
What to do
Verify the battery status and connections.
100030warning
Manual (PDF)
Battery discharge OCP
Likely cause
Over-discharge situation; reduce backup load immediately.
What to do
Reduce load and restart the inverter.
100038warningCall your installer
Manual (PDF)
Output DC over current
Likely cause
Short-term abnormality of the power grid can cause this fault.
What to do
Monitor; if persistent, contact customer service.
100041warningCall your installer
Manual (PDF)
Output DC over voltage
Likely cause
Caused by a grid voltage issue, can often recover automatically.
What to do
Contact customer service for further check if it persists.
100046warningCall your installer
Manual (PDF)
DC Input Disturbance
Likely cause
Usually recovers automatically if it happens occasionally.
What to do
Monitor for recurrences; if persistent, contact service.
100052warningCall your installer
Manual (PDF)
Backup OVP
Likely cause
Generally recovers automatically, monitor closely.
What to do
If it continues, contact customer service.
110030warning
Manual (PDF)
ISO Alarm
Likely cause
Restart the system to see if the fault persists.
What to do
Restart and monitor the system.

Part of the Alpha ESS SMILE-S5 series

Compare every Alpha ESS SMILE-S5 variant side by side →

More Alpha ESS Co Ltd Inverters

M30-INV-AU (AS4777-2 2020)

30 kW · 3φ

M50-INV-AU (AS4777-2 2020)

50 kW · 3φ

SMILE-B3-PLUS (AS4777-2 2020)

3 kW · 1φ

SMILE-B3-PLUS II (AS4777-2 2020)

3 kW · 1φ

SMILE-B3-PLUS III (AS4777-2 2020)

3 kW · 1φ

SMILE-B3-PLUS IV (AS4777-2 2020)

3 kW · 1φ

View all Alpha ESS Co Ltd inverters