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 you can add modules later as your needs change. The built-in battery optimiser lets newer modules run alongside older ones, so an upgrade 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.
The cells are lithium iron phosphate (LFP), rated for 10,000 cycles, and the battery can use its full capacity (100% depth of discharge). The system is IP66 rated, so it can be installed outside, but placement still matters for the warranty (see “Things to know before you buy”).
More on the Sigenergy range we install and how our Battery Storage service works.
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 for 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 some 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. We match the controller to your supply. 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: a 10 kW controller delivers 10 kW of backup, with short bursts up to 15 kW for motor start-ups. 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 (even two BAT 5.0 modules, at 10.4 kWh) receives the maximum.
SigenStor at a glance
Choosing your SigenStor size
BAT 5.0 module
BAT 6.0 module
BAT 8.0 module
BAT 10.0 module
Stack size
SigenStor price guide
Guide only, subject to change. These are installed prices published by an Australian installer (NSW, July 2026), not Perth quotes and not our prices. Perth pricing for your home comes with a written quote after a site visit.
- About 10.4 kWh usable (2 x BAT 5.0): $11,500 to $13,000 installed, or about $8,900 to $10,400 after the federal discount
- About 15.6 kWh usable (3 x BAT 5.0): $14,500 to $16,500 installed, or about $10,800 to $12,800 after the federal discount
- About 23.4 kWh usable (3 x BAT 8.0): $18,500 to $21,000 installed, or about $13,600 to $16,100 after the federal discount
The WA rebate is not included in those figures. 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 program ends on 31 Dec 2030. Your install date, not your contract date, sets the rate.
- 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 (VPP) 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.
What installation involves
We start with a site visit. We check your switchboard, confirm whether you’re single or three phase, and agree where the system goes. That’s usually a garage wall or a sheltered outside spot. Placement matters: Sigenergy’s warranty recommends the battery works between 10 and 30°C, so we keep it out of direct afternoon sun.
Before install, we lodge the network application with Western Power and Synergy. On the day we mount the controller and modules, wire the backup circuits you’ve chosen, and commission the system to the battery installation standard (AS/NZS 5139). Before we leave, we set up the mySigen app with you and show you how backup works. One practical note: keep the system connected to the internet. The warranty depends on it (see below).
Things to know before you buy
Pros
Very flexible sizing: start small and add modules without replacing the system.
Strong backup options, with 0 ms switchover when paired with the Gateway.
Detailed monitoring in the mySigen app, a common highlight in owner feedback.
Single- and three-phase controllers across a wide power range.
Things to consider
The warranty depends on an internet connection. If the system is offline for more than a year, cover drops to 5 years. We set up monitoring at install and recommend keeping it connected.
Recorded recall. In November 2025 the ACCC published a voluntary recall for some single-phase 8, 10 and 12 kW Energy Controllers with quick-connect AC plugs that could overheat. Sigenergy offered a free replacement, a firmware update and an extra 2 years of warranty. Faults reported with these units were linked to poor terminations, which is why install quality matters as much as the brand you choose.
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 a working system also needs the Energy Controller and installation, so it’s priced as a complete system. The guide above shows installed prices from about $11,500 for roughly 10 kWh.
Is a 20kWh battery enough to run a house?
For most homes overnight, yes. It comes down to what you use after dark. Three BAT 8.0 modules give 23.4 kWh usable. 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. For example, 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. We go through your bills and usage at the site visit.
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)
- ACCC Product Safety recall notice (November 2025)
Last updated October 2026.