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Sigenergy SigenStor-5S-40

CEC listing: SigenStor-5S-40 (AS4777-2 2020)

A 39 kWh home battery with backup power. Big home size, the 30 to 40 kWh band.

Installed in Perth, after rebates: ~$27,296Estimate: your own quote will vary
WA Battery Scheme rebate: −$1,300With a Synergy-approved inverter and VPP enrolment
Usable capacity: 39kWh
Warranty: 10yrs

Datasheet (PDF)Earlier generationWhat changed in the newer generation?

Also CEC-registered as 28 other configurations

Sigenergy lists this exact 39kWh configuration separately per compatible inverter pairing on the CEC register. These are the same physical battery, grouped here by pairing rather than shown as separate products.

SigenStor-10S

SigenStor-10S-40 (AS4777-2 2020)

SigenStor-10S-EV12

SigenStor-10S-EV12-40 (AS4777-2 2020)

SigenStor-10S-EV25

SigenStor-10S-EV25-40 (AS4777-2 2020)

SigenStor-10T

SigenStor-10T-40 (AS4777-2 2020)

SigenStor-10T-EV12

SigenStor-10T-EV12-40 (AS4777-2 2020)

SigenStor-10T-EV25

SigenStor-10T-EV25-40 (AS4777-2 2020)

SigenStor-12S

SigenStor-12S-40 (AS4777-2 2020)

SigenStor-12S-EV12

SigenStor-12S-EV12-40 (AS4777-2 2020)

SigenStor-12S-EV25

SigenStor-12S-EV25-40 (AS4777-2 2020)

SigenStor-15T

SigenStor-15T-40 (AS4777-2 2020)

SigenStor-15T-EV12

SigenStor-15T-EV12-40 (AS4777-2 2020)

SigenStor-15T-EV25

SigenStor-15T-EV25-40 (AS4777-2 2020)

SigenStor-20T

SigenStor-20T-40 (AS4777-2 2020)

SigenStor-20T-EV12

SigenStor-20T-EV12-40 (AS4777-2 2020)

SigenStor-20T-EV25

SigenStor-20T-EV25-40 (AS4777-2 2020)

SigenStor-25T

SigenStor-25T-40 (AS4777-2 2020)

SigenStor-25T-EV12

SigenStor-25T-EV12-40 (AS4777-2 2020)

SigenStor-25T-EV25

SigenStor-25T-EV25-40 (AS4777-2 2020)

SigenStor-30T

SigenStor-30T-40 (AS4777-2 2020)

SigenStor-30T-EV12

SigenStor-30T-EV12-40 (AS4777-2 2020)

SigenStor-30T-EV25

SigenStor-30T-EV25-40 (AS4777-2 2020)

SigenStor-5T

SigenStor-5T-40 (AS4777-2 2020)

SigenStor-5T-EV12

SigenStor-5T-EV12-40 (AS4777-2 2020)

SigenStor-5T-EV25

SigenStor-5T-EV25-40 (AS4777-2 2020)

SigenStor-6S

SigenStor-6S-40 (AS4777-2 2020)

SigenStor-8S

SigenStor-8S-40 (AS4777-2 2020)

SigenStor-8S-EV12

SigenStor-8S-EV12-40 (AS4777-2 2020)

SigenStor-8S-EV25

SigenStor-8S-EV25-40 (AS4777-2 2020)

SigenStor-5S-40: the short answer

In the Sigen Energy Storage SystemOne of 91 sizes, from 5.2 to 50 kWh: 39kWhOne of 91 sizes, from 5.2 to 50 kWh
WA Battery Scheme$1,300 with a Synergy-approved inverter and VPP enrolment: Likely eligible$1,300 with a Synergy-approved inverter and VPP enrolment
Works withFrom the manufacturer's documentation; the CEC register doesn't list pairings: Sigenergy SigenStorFrom the manufacturer's documentation; the CEC register doesn't list pairings
Continuous powerRuns most of a home, but not everything at full tilt: 5kWRuns most of a home, but not everything at full tilt

Other sizes in the Sigen Energy Storage System

What we can tell you

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

39 kWh sits in the big home band (30 to 40 kWh).
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: 39kWh; How much energy it stores for you to use
Continuous power: 5kW; How much it can run at once: most of a home, but not everything at full tilt
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; 70% of capacity guaranteed at the end of it
Battery chemistry: LFP; Lithium iron phosphate, the long-cycle-life type

Warranty and support

This warranty covers defects in materials and workmanship for up to 10 years. Exclusions include damage due to mishandling. To claim, submit a ticket via the mySigen APP within 30 days of failure.

Product: 10 years; transferable; full replacement
At year 10: At least 70% of capacity
Throughput: 15.85 MWh
Installation: Must be installed by an SAA-accredited installer
Support: Australian officeSigenergy Australia; 3 years in the Australian market. Direct manufacturer warranty. Australian consumer law applies.
Perth heat: Rated to 55°C, which covers Perth's hottest days.

Warranty document Datasheet Compare warranties

WA Battery Scheme eligibility

Likely 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: Pairs with Sigenergy SIGEN ENERGY STORAGE SYSTEM.
VPP activation ready: Ready for Synergy VPP participation.
WA Battery Scheme rebate: Up to $1,300 for Synergy customers (10kWh max eligible).
Synergy Battery Rewards: Requires a CSIP-AUS compliant system and reliable internet.
Interest-free loan: Qualifies for up to $10,000 interest-free.

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 Sigenergy Sigen Energy Storage System, by section.

Cell & chemistry

Chemistry: LFP

Capacity & power

Nominal capacity: 40.3 kWh
Usable capacity: 39 kWh
Continuous power: 5 kW

Lifespan & degradation

Capacity retained at year 10: 70%
Warranted throughput: 15.85 MWh

Backup & grid services

Backup capable: Yes
Off-grid capable: Yes

Physical

Dimensions (H×W×D): 1720 × 850 × 260 mm
Weight: 396 kg
IP rating: IP66

Operating environment

Operating temperature: -20°C to 55°C

Connectivity & monitoring

Coupling: all-in-one

Installation requirements

Top clearance: 500 mm
Side clearance: 500 mm
Front clearance: 500 mm
AC breaker: 10 A
Cable gauge: 10 mm²
Earthing method: TN-S
DNSP pre-approval: Yes
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.

Documents

About Sigenergy

Years in the Australian market: 3+ (CEC-approved products since 2023)
Local support: Available
CEC-listed products: 2118 models

View full profile →

What it costs in Perth

$35,100

Typical installed price, before rebates

WA Battery Scheme: −$1,300
Federal STCs: −$6,504
You’d pay about: $27,296

The WA Battery Scheme pays $1,300 on this size when it is installed with a Synergy-approved inverter and enrolled in a VPP. 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 to 15 kWh
Medium home: 20 to 30 kWh
Big home: 30 to 40 kWh
Very big home: 40+ kWh

This battery is one unit in the big home band. The WA rebate caps at 10 kWh, but that is a rebate limit, not a sizing guide.

Does waiting change the rebate?

Estimated federal rebate (STCs) for this 39 kWh battery

How it compares

The Sigenergy SigenStor-5S-40 against the closest-sized batteries from other brands.

Specification	Sigenergy SigenStor-5S-40Sigenergy	Alpha ESS SMILE-BAT-8.2 PH VAlpha ESS	Hoymiles HiOne-16T-40B-G3-AUHoymiles

Usable capacity?	39 kWh	39 kWh	39 kWh
Continuous power?	5 kW	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 Sigenergy

Other CEC-approved products from Sigenergy available in Australia.

Sigenergy Inverters

Sigen Hybrid 10.0 SP AU

9.999 kW

Sigen Hybrid 10.0 TP AU

9.999 kW · 3φ

Sigen Hybrid 12.0 SP AU

12 kW

Sigen Hybrid 12.0 TP AU

12 kW · 3φ

Sigen Hybrid 15.0 TP AU

15 kW · 3φ

Sigen Hybrid 17.0 TP AU

17 kW · 3φ

View all Sigenergy inverters

View full Sigenergy 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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