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Home battery · Deye · CEC approved February 2026

Deye AI-W5.1-B

A 4.6 kWh home battery.

Installed in Perth, after rebates: ~$4,140; Typical estimate — your own quote will vary
WA Battery Scheme rebate: $0; It's under the scheme's 5 kWh minimum size
Usable capacity: 4.6kWh; Below the smaller-home band

What we can tell you

Read from the figures on this page — no review written yet

4.6 kWh is below the smaller-home band — this is one module of a larger stack.
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 How much energy it stores for you to use: 4.6kWh
Continuous power How much it can run at once — the essentials, not the whole house: 2.5kW
Round-trip efficiency How much of the energy you store comes back out: 98%
Depth of discharge How much of the battery you can actually use: 90%
Warranty 80% of capacity guaranteed at the end of it: 10yr
Battery chemistry Lithium iron phosphate — the long-cycle-life type: LFP

Full datasheet

Every figure on file for the Deye AI-W, by section.

Full datasheet, by section
Specification	Value
Cell & chemistry
Chemistry	LFP
Cell type	Cobalt Free Lithium Iron Phosphate
Capacity & power
Nominal capacity	5.12 kWh
Usable capacity	4.6 kWh
Continuous power	2.5 kW
Peak power	3.6 kW
Depth of discharge	90%
Round-trip efficiency	97.6%
Nominal voltage	51.2 V
Lifespan & degradation
Cycle life	6000 cycles
Capacity retained at year 10	80%
Warranted throughput	0 MWh
Modularity & stacking
Modular / stackable	Yes
Maximum stack	184 kWh
Backup & grid services
Backup capable	No
VPP ready	No
Physical
Dimensions (H×W×D)	300 × 720 × 255 mm
Weight	53 kg
IP rating	IP65
Operating environment
Operating temperature	-20°C to 55°C
Installation requirements
AC breaker	40 A
Cable gauge	6 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.

Documents

Warranty and support

Warranty terms and Australian support structure.

Covers defects in materials and workmanship for 10 years. Major exclusions include unauthorized modifications. Claims require the original purchase receipt and product details.

Duration

years

Throughput

—

not on record

Max Temp

55°

celsius

Max Backup

Level 0

No Backup

Australian support structure

Not verified

We have not verified this brand's Australian support structure. Confirm warranty arrangements with the manufacturer or your installer.

Perth heat

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

Key warranty terms

•Depth of Discharge: 90% usable capacity
•Round-trip Efficiency: 98% rated
•Annual Degradation: ~2.5% per year expected
•Installation: Must be installed by SAA-accredited installer
•Operating Conditions: -20°C to 55°C

✓ TransferableFull replacement≥80% capacity at year 10

Warranty Document Datasheet Compare Warranties

WA Battery Scheme eligibility

Check eligibility

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

About Deye

View Full Profile →

Years in AU Market6+ years

Local SupportNot verified

CEC-Listed Products53 models

6yr AU

CEC-approved products since 2020

6 years in the Australian market

Fault & error codes — Deye AI-W

Extracted from the installation manual

19 documented

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

F08criticalCall your installer
Manual (PDF)
GFDI Relay Failure
Likely cause
When inverter is in Split phase or three-phase system, the backup load port N line needs to connect ground.
What to do
Ensure the N line is properly connected to ground; if the fault persists, contact support.
F22criticalCall your installer
Manual (PDF)
Tz Emerg Stop Fault
Likely cause
System emergency stop triggered.
What to do
Contact your installer for assistance.
F35criticalCall your installer
Manual (PDF)
No AC grid
Likely cause
Grid power not available.
What to do
Confirm if the grid is lost; check grid connections.
F63criticalCall your installer
Manual (PDF)
ARC fault
Likely cause
Arcing detected on PV side (US market only).
What to do
Inspect PV module connections; contact support for assistance.
F64criticalCall your installer
Manual (PDF)
Heat sink high temperature failure
Likely cause
Excessive ambient temperature.
What to do
Turn off inverter and let it cool for 10 mins; restart and check conditions.
F18warningCall your installer
Manual (PDF)
AC over current fault
Likely cause
Backup load power exceeds allowed range.
What to do
Check if the backup load power is within allowed range; restart the inverter.
F20warningCall your installer
Manual (PDF)
DC over current fault
Likely cause
High PV module or battery power during inverter startup with large load.
What to do
Reduce load power and restart the inverter.
F23warningCall your installer
Manual (PDF)
AC leakage current is transient over current
Likely cause
Possible leakage current fault.
What to do
Check PV side cable ground connection; restart system 2-3 times.
F24warningCall your installer
Manual (PDF)
DC insulation impedance failure
Likely cause
PV isolation resistance is too low.
What to do
Ensure PV connections are firm and correct; check PE cable connections.
F26warningCall your installer
Manual (PDF)
The DC busbar is unbalanced
Likely cause
Load imbalance in split phase mode.
What to do
Wait a moment and check if the system stabilizes; restart 2-3 times if needed.
F34warningCall your installer
Manual (PDF)
AC Overcurrent fault
Likely cause
Backup load connected exceeds allowed power range.
What to do
Verify the connected load is within range; contact support if the issue persists.
F42warningCall your installer
Manual (PDF)
AC line low voltage
Likely cause
Grid voltage below standard range.
What to do
Check the AC voltage; if it’s still low, contact your installer.
F47warningCall your installer
Manual (PDF)
AC over frequency
Likely cause
Grid frequency exceeds specification.
What to do
Check grid frequency; if it remains high, contact your installer.
F48warningCall your installer
Manual (PDF)
AC lower frequency
Likely cause
Grid frequency below specification.
What to do
Verify grid frequency; reach out for support if the problem continues.
F56warningCall your installer
Manual (PDF)
DC busbar voltage is too low
Likely cause
Battery voltage is low.
What to do
Charge the battery using PV or grid power; check connections.
F58warningCall your installer
Manual (PDF)
BMS communication fault
Likely cause
Communication lost between inverter and battery BMS.
What to do
Disable BMS Err-Stop on the LCD; contact support if issues persist.
F13info
Manual (PDF)
Working mode change
Likely cause
Changes in grid type or frequency, or changing battery mode to No battery.
What to do
Turn off the DC switch and AC switch, wait one minute, and then turn them back on; if the problem persists, seek help.
F29info
Manual (PDF)
Parallel CANBus fault
Likely cause
Issues with parallel communication cable or address setting.
What to do
Check parallel communication cable connection and inverter communication address settings; restart system.
F41info
Manual (PDF)
Parallel system stop
Likely cause
One inverter in the parallel system is OFF.
What to do
Check and ensure all inverters are ON; if the fault persists, contact support.

What it costs in Perth

$4,140

Typical installed price, before rebates

WA Battery Scheme: $0
Federal STCs: $0
You’d pay about: $4,140

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: 10–15 kWh
Medium home: 20–30 kWh
Big home: 30–40 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 Deye AI-W5.1-B against the closest-sized batteries from other brands.

Specification	Deye AI-W5.1-BDeye	AMASSTORE GTX5000-PROAMASSTORE	AVOL Genius BA5AVOL

Usable capacity?	4.6 kWh	4.6 kWh	4.6 kWh
Continuous power?	2.5 kW	Not verified	Not verified
Peak power?	3.6 kW	Not verified	Not verified

Round-trip efficiency?	98%best value	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 Deye

Other CEC-approved products from Deye available in Australia.

Deye Inverters

AI-W5.1-10P1-AU-B (AS4777-2 2020)

9.999 kW · 1φ

AI-W5.1-10P3-AU-B (AS4777-2 2020)

10 kW · 3φ

AI-W5.1-12P3-AU-B (AS4777-2 2020)

12 kW · 3φ

AI-W5.1-3.6P1-AU-B (AS4777-2 2020)

3.6 kW · 1φ

AI-W5.1-5P1-AU-B (AS4777-2 2020)

5 kW · 1φ

AI-W5.1-5P3-AU-B (AS4777-2 2020)

5 kW · 3φ

View all Deye inverters

View full Deye 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.