Loading Solar Battery Perth...

Home battery · SAJ · CEC approved September 2026

SAJ EK90 BU5-7.0-TV

A 7 kWh home battery.

Installed in Perth, after rebates: ~$4,425; Typical estimate — your own quote will vary
WA Battery Scheme rebate: Depends on your inverter; The scheme needs a Synergy-approved inverter — we don't know yours
Usable capacity: 7kWh; Below the smaller-home band

Datasheet (PDF)See the whole EK90 HS5 series

What we can tell you

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

7 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: 7kWh
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 SAJ EK90 HS5, by section.

Full datasheet, by section
Specification	Value
Cell & chemistry
Chemistry	LFP
Capacity & power
Round-trip efficiency	97.6%
Lifespan & degradation
Cycle life	12000 cycles
Capacity retained at year 10	80%
Warranted throughput	0 MWh
Physical
IP rating	IP66
Installation requirements
Top clearance	0 mm
Side clearance	0 mm
Front clearance	0 mm
AC breaker	63 A
Earthing method	TN-S
DNSP pre-approval	Yes

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.

The warranty covers defects for 10 years, with a pro-rata policy after 5 years. Avoid tampering to keep the warranty valid. Claims can be submitted via the website.

Duration

years

Throughput

—

not on record

Max Temp

45°

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 climate suitability

Suitable with precautions

Rated to 45°C. Plan for a shaded or garage install through Perth summers.

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: -10°C to 45°C

✓ TransferablePro-rata≥80% capacity at year 10

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.

AC-coupled system: needs a gateway device on the Synergy SSL (e.g. SMA, Redback), or a same-brand inverter + battery pair (Sungrow or Fronius) for shared compliance. Without one, export is limited to 1.5kW and VPP/DEBS/rebate/loan are unavailable — and third-party gateways can struggle to meet compliance testing. Any later addition to an AC-coupled system triggers whole-of-site compliance, so for many homes replacing toward a hybrid (DC-coupled) inverter is the sounder 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 SAJ

View Full Profile →

Years in AU Market8+ years

Local SupportNot verified

CEC-Listed Products34 models

8yr AU

CEC-approved products since 2018

8 years in the Australian market

Fault & error codes — SAJ EK90 HS5

Extracted from the installation manual

6 documented

Showing 6 of 6. The official install manual is the authoritative source — always confirm before acting.

1criticalCall your installer
Manual (PDF)
Master Relay Error
Likely cause
Relay malfunction or failure to engage/disengage properly
What to do
Contact installer for relay replacement or repair
2criticalCall your installer
Manual (PDF)
Master EEPROM Error
Likely cause
Corrupted or faulty EEPROM on the master controller
What to do
Contact installer for replacement of the master controller
3warning
Manual (PDF)
Master Temperature High Error
Likely cause
Excessive heat detected in the master unit
What to do
Ensure proper ventilation and cooling; contact installer if issue persists
4warning
Manual (PDF)
Master Temperature Low Error
Likely cause
Operating temperature below acceptable limits
What to do
Check ambient temperature; contact installer for further assistance if necessary
5warning
Manual (PDF)
Master Lost Communication M<->S
Likely cause
Communication failure between master and slave units
What to do
Check connections and restart the system; contact installer if issue persists
6warning
Manual (PDF)
Master GFCI Device Error
Likely cause
Ground fault circuit interrupter malfunction
What to do
Reset the GFCI; contact installer for further assistance if necessary

What it costs in Perth

$6,300

Typical installed price, before rebates

WA Battery Scheme: Depends on your inverter
Federal STCs: −$1,875
You’d pay about: $4,425

The WA Battery Scheme (up to $1,300) needs a Synergy-approved inverter and VPP enrolment. We don't know which inverter you'd pair this with, so it isn't deducted above — ask your installer. STCs assume about $39.9 a certificate. 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.

The federal rebate shrinks each year

STC value for this 7 kWh battery

How it compares

The SAJ EK90 BU5-7.0-TV against the closest-sized batteries from other brands.

Specification	SAJ EK90 BU5-7.0-TVSAJ	Atmoce MS-7K-U-1P (AS4777-2 2020)Atmoce	Atmoce MS-7K-U-1P + MC100PRO-S1P (AS4777-2 2020)Atmoce

Usable capacity?	7 kWh	7 kWh	7 kWh
Continuous power?	Not verified	Not verified	Not verified
Peak power?	Not verified	Not verified	Not verified

Round-trip efficiency?	98%best value	92%	92%
Warranty	10 years	10 years	10 years
Chemistry	LFP	LFP	LFP

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

More from SAJ

Other CEC-approved products from SAJ available in Australia.

SAJ Inverters

C6-100K-T9-40 (AS4777-2 2020)

100 kW · 3φ

C6-110K-T12-40 (AS4777-2 2020)

110 kW · 3φ

C6-125K-T12-40 (AS4777-2 2020)

125 kW · 3φ

C6-75K-T6-40 (AS4777-2 2020)

75 kW · 3φ

C6-99K-T9-40 (AS4777-2 2020)

99.999 kW · 3φ

CHS2-29.9K-T4-204.8V/280Ah/51.5kWh (AS4777-2 2020)

29.999 kW · 3φ

View all SAJ inverters

View full SAJ 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.