Loading Solar Battery Perth...

Home battery · Koyoe · CEC approved July 2026

Koyoe KY-51V105AH-S

A 4.84 kWh home battery.

Installed in Perth, after rebates: ~$4,356; Typical estimate — your own quote will vary
WA Battery Scheme rebate: $0; It's under the scheme's 5 kWh minimum size
Usable capacity: 4.84kWh; Below the smaller-home band

What we can tell you

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

4.84 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 How much energy it stores for you to use: 4.84kWh
Round-trip efficiency How much of the energy you store comes back out: 92%
Depth of discharge How much of the battery you can actually use: 90%
Warranty How long the manufacturer stands behind it: 10yr
Battery chemistry Lithium iron phosphate — the long-cycle-life type: LFP

Full datasheet

Every figure on file for the Koyoe NA, by section.

Full datasheet, by section
Specification	Value
Cell & chemistry
Chemistry	LFP
Capacity & power
Nominal capacity	5.38 kWh
Usable capacity	4.84 kWh
Physical
IP rating	IP65
Operating environment
Operating temperature	-25°C to 60°C

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.

This warranty covers the repair or replacement of defective solar products for 10 years. It excludes damages from improper installation or environmental conditions.

Duration

years

Throughput

∞

MWh

Max Temp

60°

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 60°C, which covers Perth's hottest days.

Key warranty terms

•Depth of Discharge: 90% usable capacity
•Round-trip Efficiency: 92% rated
•Annual Degradation: ~2.5% per year expected
•Installation: Must be installed by SAA-accredited installer
•Operating Conditions: -25°C to 60°C

✗ Non-transferableFull replacement

Warranty Document Datasheet Compare Warranties

WA Battery Scheme eligibility

Conditional

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

This battery is AC-coupled. To get the WA rebate, the interest-free loan, VPP payments or DEBS export credits, it needs a gateway device from Synergy's approved list (for example SMA or Redback), or an inverter and battery from the same brand (Sungrow or Fronius). Without one, exports are capped at 1.5kW.

Some third-party gateways struggle to pass compliance testing, and adding anything to an AC-coupled system later means the whole system has to be re-checked. For many homes, switching to a hybrid (DC-coupled) inverter is the simpler path. AC vs DC coupling

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 KOYOE

View Full Profile →

Years in AU Market2+ years

Local SupportNot verified

CEC-Listed Products6 models

2yr AU

CEC-approved products since 2024

2 years in the Australian market

Fault & error codes — Koyoe NA

Extracted from the installation manual

13 documented

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

Battery Over Temperature FaultcriticalCall your installer
Manual (PDF)
Battery temperature exceeds safe limits.
Likely cause
Battery placed in a high temperature area.
What to do
Allow battery to cool and check placement.
Battery Voltage Low FaultcriticalCall your installer
Manual (PDF)
Battery voltage is too low.
Likely cause
Incorrect battery connections or battery issues.
What to do
Check battery connections and health; restart the inverter if needed.
Bus Voltage HighcriticalCall your installer
Manual (PDF)
High bus voltage detected in the inverter.
Likely cause
PV input voltage exceeds 550V.
What to do
Check PV input voltage and reduce it if necessary.
GFCI FaultcriticalCall your installer
Manual (PDF)
Ground Fault Circuit Interrupter fault detected.
Likely cause
Grounding current is too high, or AC side circuit issues.
What to do
Remove PV panel and check peripheral AC system.
Inverter Module Over Temperature FaultcriticalCall your installer
Manual (PDF)
Inverter module has overheated.
Likely cause
Blocked heat sinks or high ambient temperature.
What to do
Ensure proper ventilation and cooling; allow cooling down.
Isolation FaultcriticalCall your installer
Manual (PDF)
Isolation issue detected in the inverter.
Likely cause
Inverter not effectively grounded, or low insulation between poles.
What to do
Check grounding and insulation levels.
Off Grid Over Voltage FaultcriticalCall your installer
Manual (PDF)
High output voltage detected in off-grid mode.
Likely cause
Incorrect off-grid port connection or load issue.
What to do
Check off-grid port and load functionality.
PV Overvoltage FaultcriticalCall your installer
Manual (PDF)
Photovoltaic input voltage exceeds the limit.
Likely cause
PV input voltage is above 550V.
What to do
Check the PV input voltage and reduce if necessary.
BMS Communication FaultwarningCall your installer
Manual (PDF)
Battery Management System communication error.
Likely cause
Failed communication between battery pack and inverter.
What to do
Check communication cable and restart inverter if needed.
Grid Frequency FaultwarningCall your installer
Manual (PDF)
Grid frequency is out of acceptable limits.
Likely cause
Frequency levels too high or too low.
What to do
Wait for grid frequency to stabilize before restarting.
Grid Voltage FaultwarningCall your installer
Manual (PDF)
Grid voltage is outside the acceptable range.
Likely cause
Voltage levels too high or too low.
What to do
Wait for grid voltage to normalize before restarting the inverter.
Low Ambient Temperature Warnwarning
Manual (PDF)
Ambient temperature is too low.
Likely cause
Surrounding temperature is lower than acceptable.
What to do
Wait for the ambient temperature to rise before restarting the inverter.
SPI Communication FaultwarningCall your installer
Manual (PDF)
Error in master-slave DSP communication.
Likely cause
Communication failure in DSP systems.
What to do
Restart the inverter; contact customer service if issues persist.

What it costs in Perth

$4,356

Typical installed price, before rebates

WA Battery Scheme: $0
Federal STCs: $0
You’d pay about: $4,356

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 Koyoe KY-51V105AH-S against the closest-sized batteries from other brands.

Specification	Koyoe KY-51V105AH-SKoyoe	SolarEdge BAT-05K48SolarEdge	Sunvolt SV-LV ESS G3 5.4-1(5.37kWh)Sunvolt

Usable capacity?	4.84 kWh	4.85 kWhbest value	4.83 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.

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.