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Home battery · Growatt · APX S1 series · CEC approved November 2023

Growatt APX 5.0P-S1

A 4.5 kWh home battery.

Installed in Perth, after rebates: ~$4,800Estimate: your own quote will vary
WA Battery Scheme rebate: $0It's under the scheme's 5 kWh minimum size
Usable capacity: 4.5kWhBelow the smaller-home band
Warranty: 10yrs

APX 5.0P-S1: the short answer

In the APX S1 seriesOne of 6 sizes, from 4.5 to 27 kWh: 4.5kWhOne of 6 sizes, from 4.5 to 27 kWh
WA Battery SchemeIt's under the scheme's 5 kWh minimum size: Not eligibleIt's under the scheme's 5 kWh minimum size

Other sizes in the APX S1 series

What we can tell you

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

4.5 kWh is below the smaller-home band.
It is CEC-approved, which is a condition of both the federal STC discount and the WA Battery Scheme.
We can't score it: a value score needs a price and full specs, and without them any number would be guesswork.

Key specs, in plain terms

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

Usable capacity: 4.5kWh; How much energy it stores for you to use
Round-trip efficiency: 92%; How much of the energy you store comes back out
Depth of discharge: 90%; How much of the battery you can actually use
Warranty: 10yr; 60% of capacity guaranteed at the end of it
Battery chemistry: LFP; Lithium iron phosphate, the long-cycle-life type
Size and weight: 135kg; Installed weight

Warranty and support

The 10-year warranty covers defects in battery performance, retaining at least 60% capacity. Warranty voids for misuse or failure to follow guidelines. Claims can be made via Growatt service.

Product: 10 years; not transferable; full replacement
At year 10: At least 60% of capacity
Throughput: Not on record
Installation: Must be installed by an SAA-accredited installer
Support: Australian officeGrowatt Australia; 12 years in the Australian market. Direct manufacturer warranty. Australian consumer law applies.

Warranty document Datasheet Compare warranties

WA Battery Scheme eligibility

Not 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: Needs pairing with a Synergy SSL approved inverter.
VPP activation ready: VPP activation requires a Synergy SSL approved inverter.
WA Battery Scheme rebate: Requires Battery Rewards participation under the current WA framework.
Synergy Battery Rewards: Requires a CSIP-AUS compliant system and reliable internet.
Interest-free loan: Not eligible for interest-free financing.

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

Full datasheet

Every figure on file for the Growatt APX S1, by section.

Cell & chemistry

Chemistry: LFP

Capacity & power

Nominal capacity: 14.33 kWh
Usable capacity: 4.5 kWh

Lifespan & degradation

Capacity retained at year 10: 60%
Warranted throughput: 0 MWh

Physical

Weight: 135 kg
IP rating: IP66

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.

Documents

Fault & error codes — Growatt APX S1

Extracted from the installation manual

13 documented

Showing 13 of 13. The official install manual is the authoritative source — always confirm before acting.

BUS_SHORTcriticalCall your installer
Manual (PDF)
Power cable short-circuited
Likely cause
Check whether the positive and negative terminals are reversely connected.
What to do
Disconnect power immediately and rectify the issue.
CHIP_FAULTcriticalCall your installer
Manual (PDF)
Chip fault protection
Likely cause
Communication loss between two MCUs
What to do
Stop using the battery and contact the installer.
CURRENT_SAMP_FAULTcriticalCall your installer
Manual (PDF)
Current sampling fault
Likely cause
BMS current sampling failure
What to do
Stop using the battery and contact the installer.
DISCHARGE_UVcriticalCall your installer
Manual (PDF)
Discharge under-voltage protection
Likely cause
Single cell voltage is below the threshold for under-voltage protection
What to do
Stop discharging and recharge the battery after rectification.
EEPROM_FAULTcriticalCall your installer
Manual (PDF)
EEPROM fault protection
Likely cause
BMS MCU fails to receive data from EEPROM
What to do
Stop using the battery and contact the installer.
HIGH_TEMPcritical
Manual (PDF)
High temperature protection
Likely cause
The temperature exceeds the BMS protection value
What to do
Stop using the battery immediately and let it cool down.
MAIN_CIRCUIT_FAULTcriticalCall your installer
Manual (PDF)
Main circuit fault
Likely cause
BMS main power circuit failure
What to do
Stop using the battery and contact the installer.
POWER_CONN_FAILcriticalCall your installer
Manual (PDF)
Power cable connection failure
Likely cause
The power cable is disconnected from the hybrid inverter
What to do
Check whether the power cable is securely connected and if the switch is turned ON.
VOLT_SAMP_ANOMALYcriticalCall your installer
Manual (PDF)
Voltage sampling anomaly protection
Likely cause
BMS voltage sampling failure
What to do
Stop using the battery and contact the installer.
ALMwarningCall your installer
Manual (PDF)
Communication with hybrid inverter failed
Likely cause
Communication loss between the hybrid inverter and the APX battery system
What to do
Ensure that the hybrid inverter is powered on. Check if the communication cables are securely connected. If the problem persists, contact the installer.
CHARGE_OVwarning
Manual (PDF)
Charge over-voltage protection
Likely cause
Single cell voltage exceeds threshold for over-voltage protection
What to do
Stop charging; the alarm will disappear.
COM_FAIL_OKwarning
Manual (PDF)
Communication with BM failed
Likely cause
Communication loss between the Control Module and the Battery Module
What to do
Check whether the communication cable is securely connected.
LOW_TEMPinfo
Manual (PDF)
Low temperature protection
Likely cause
The temperature is below the protection value.
What to do
Wait for the temperature to rise; no action is needed.

About Growatt

Years in the Australian market: 12+ (CEC-approved products since 2014)
Local support: Not verified
CEC-listed products: 50 models

View full profile →

What it costs in Perth

$4,800

Typical installed price, before rebates

WA Battery Scheme: $0
Federal STCs: $0
You’d pay about: $4,800

The WA rebate is $0 here: it's under the scheme's 5 kWh minimum size. Federal STCs are $0 here: this battery is below the size where the program issues certificates. Estimates only; your quote will vary.

Explore your options

Which size band is your home?

Usable capacity, for one battery system

Smaller home: 10 to 15 kWh
Medium home: 20 to 30 kWh
Big home: 30 to 40 kWh
Very big home: 40+ kWh

This battery is below the smaller-home band. The WA rebate caps at 10 kWh, but that is a rebate limit, not a sizing guide.

How it compares

The Growatt APX 5.0P-S1 against the closest-sized batteries from other brands.

Specification	Growatt APX 5.0P-S1Growatt	Freedom Won Freedom Won LiTE Home 5/4 52VFreedom Won	GCL Honror ES RY-5-S1GCL

Usable capacity?	4.5 kWh	4.5 kWh	4.5 kWh
Continuous power?	Not verified	Not verified	Not verified
Peak power?	Not verified	Not verified	Not verified

Round-trip efficiency?	92%	92%	92%
Warranty	10 years	Not verified	Not verified
Chemistry	LFP	LFP	LFP

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

More from Growatt

Other CEC-approved products from Growatt available in Australia.

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MAX 110KTL3-X LV

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View all Growatt inverters

View full Growatt 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.

This model is one entry in the desk's index of solar batteries for Perth: every CEC-approved battery on one comparable dataset.

Product Information Disclaimer:

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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