How the SigenStor works
The Energy Controller is the brains of the system. It is the inverter for your solar panels, it manages the battery, and it talks to the mySigen app. Battery modules stack beneath it, and the built-in battery optimiser lets newer modules run alongside older ones, so an upgrade later doesn’t mean replacing what you have.
Controllers come in single-phase (5 to 12 kW) and three-phase (5 to 30 kW) versions. The three-phase models can supply uneven loads across the phases, which matters in homes where most circuits sit on one phase. You can also add an EV DC charging module to the stack if you plan to charge a car from the same system.
Which size suits your home
Start with what your home uses between sunset and sunrise, because that’s the gap the battery fills. Your electricity bill or the Synergy app will show it. Then add a margin for cloudy days and anything you plan to add, such as an EV or a pool pump.
For example, if your home uses around 12 kWh overnight, two BAT 8.0 modules (15.6 kWh usable) cover it with headroom. If you’re closer to 20 kWh, three BAT 8.0 modules give 23.4 kWh. Smaller households that mainly want to soak up solar they’d otherwise export often start with two BAT 5.0 modules (10.4 kWh) and add more later.
Two other things shape the choice:
- Single or three phase. A three-phase home with a big solar array usually needs a three-phase controller.
- How much power you want during an outage. The controller’s rating sets how much it can supply at once. If you want to run ducted air-con in a blackout, size the controller for it, not just the battery.
For the WA rebate, the amount scales with usable capacity up to 10 kWh, so any stack of 10 kWh usable or more receives the maximum.
Choosing your SigenStor size
BAT 5.0 module
BAT 6.0 module
BAT 8.0 module
BAT 10.0 module
Stack size
SigenStor at a glance
What affects the cost of a SigenStor
Guide only, subject to change. We do not publish fixed prices because the cost depends on your home. Perth pricing for your home comes with a written quote after a site visit.
Final cost depends on your switchboard, the install location, backup wiring and whether you add an EV charging module.
Rebates on a SigenStor in Perth
- Federal discount: applied up front through STCs. From 1 May 2026 it is tiered: full value on the first 14 kWh, 60% from 14 to 28 kWh, and 15% from 28 to 50 kWh. It steps down every six months until the scheme ends in 2030.
- WA Residential Battery Scheme: for Synergy customers, up to $1,300. It scales with usable capacity up to 10 kWh, and larger batteries get the maximum. You must join a Virtual Power Plant program with Synergy or Horizon Power.
- Eligibility: the system has to be on Synergy’s Supported Solutions List. Sigenergy is listed, and we confirm your exact model before you sign.
Use our battery rebate calculator to estimate your combined WA and federal discount for a SigenStor.
What installation involves
Site assessment
We visit the property and inspect the existing solar system, the switchboard and the proposed location. We then recommend a capacity and a position that stays accessible and within the manufacturer temperature guidelines.
Compatibility check
We check whether your existing inverter can work with a battery directly or needs changing. You receive a clear outline of the components and how they work together before any installation work begins.
Choose your backup wiring
Backup means wiring selected circuits to the battery. You choose between essential circuits only and a wider set, and what stays powered depends on battery capacity and how it is wired.
Installation day
Technicians mount the unit in a shaded, ventilated position, install isolators, route the cabling and integrate the battery with your existing solar set-up. Every connection is tested before commissioning begins.
Network approval
The installation is documented and connected to meet Australian standards and Western Power network requirements. Correct isolators, testing and documentation are provided for meter approval, which avoids delays and rework.
Commissioning to AS/NZS 5139
Commissioning for home batteries includes AS/NZS 5139. We configure the charge and discharge settings, connect the monitoring and confirm the system is storing and releasing energy correctly.
For how this kind of job is planned, wired and commissioned, see our home battery installation service.
Things to know before you buy
Pros
You can start small and grow later. Modules can be added over time without replacing the system.
Backup options are strong. Switchover takes 0 ms when the battery is paired with the Gateway.
Monitoring is detailed. The mySigen app gives detailed monitoring of the system.
Controllers suit both phase types. Single- and three-phase controllers are available across a wide power range.
Things to consider
The warranty depends on an internet connection. The warranty terms expect the system to stay connected. We set up monitoring at install and recommend keeping it connected.
Optional extra warranty must be bought early. Sigenergy offers an extra 5 years on the battery, but only within 12 months of install and only with selected controllers.
Backup isn’t automatic. Instant whole-home or essential-circuit backup needs the Gateway and the right wiring. Decide this at quote stage, not after.
SigenStor questions Perth homeowners ask
What is the price of an 8kWh Sigenergy battery?
A single BAT 8.0 module gives 7.8 kWh usable, but it’s priced as a complete system with the Energy Controller and installation. Final cost depends on how many modules you need, so we quote after a site visit.
Is a 20kWh battery enough to run a house?
For most homes overnight, yes, depending on what you use after dark. To run big loads during a blackout, the controller size matters too.
How long will a 16kWh battery run a house?
About as long as your evening and overnight usage allows. A home using 12 kWh overnight would get through the night on a 15.6 kWh stack with some to spare.
What happens to solar power if the battery is full?
The excess goes to the grid as normal export.
Is it worth getting battery storage with solar?
It’s most worthwhile when you export a lot of daytime solar and buy power back at night. The WA rebate and federal discount shorten the payback.
Get a SigenStor quote
Sources
- Sigenergy SigenStor datasheets and warranty terms (2026)
- Clean Energy Regulator: Cheaper Home Batteries changes from 1 May 2026
- Government of Western Australia: Residential Battery Scheme
- Synergy Supported Solutions List (October 2026)
Last updated October 2026.