Brand Partner
Sigenergy
Australia's #1 energy storage brand. Installed by EES across Geelong, Torquay and the Surf Coast.
Who is Sigenergy?
Sigenergy was founded in 2022 by Tony Xu, who previously led Huawei's smart solar and energy storage division. In under three years the company has become the number one battery storage supplier in Australia, holding the top position for over ten consecutive months according to SunWiz market data. They're also the leading supplier in Ireland and South Africa.
The company has over 600 employees, with active operations across Australia, Europe, and expanding markets. The engineering reflects their Huawei roots, everything's built to work together out of the box, the hardware feels well-made, and the software does the thinking for you.
EES is a certified Sigenergy installer. We design, install and monitor SigenStor and SigenStack systems for homes and businesses right across Geelong, Torquay and the Surf Coast.
The SigenStor Platform
Most home battery systems are assembled from separate components: an inverter from one brand, a battery from another, an EV charger bolted on later. SigenStor takes a different approach. It's a genuine 5-in-1 platform that integrates five core functions into a single system:
- Solar PV inverter, up to 25kW DC input with multiple MPPTs for different roof orientations
- Battery power conversion, DC-coupled for higher round-trip efficiency than AC-coupled alternatives
- LFP battery storage, stackable modules from 5kWh to over 150kWh
- Energy management system, AI-driven optimisation via the mySigen app
- DC EV charger, optional 25kW bidirectional charger with V2H and V2G capability
The result is fewer boxes on your wall, fewer connection points, and a system that was designed to work together from the start rather than being cobbled together after the fact.
Single-phase and 3-phase Sigenergy configurations
Most Geelong homes run on single-phase power, and Sigenergy's single-phase SigenStor inverters (8 kW, 10 kW and 12 kW) fit these perfectly. If you've got a larger home or small business on 3-phase, Sigenergy also offers 3-phase commercial inverters from 50 kW up. We'll check your meter board on the site visit and size it right.
Battery Specifications
SigenStor uses lithium iron phosphate (LFP) cells, which are the safest and longest-lasting chemistry available for home storage. The numbers:
| Chemistry | LiFePO4 (LFP) |
| Module sizes | 5.38 kWh or 8.06 kWh |
| Depth of discharge | 97% |
| Cycle life | 6,000+ cycles |
| Scalability | Up to 6 modules per stack, up to 5 stacks |
| Max capacity | ~150 kWh (residential), 25 MWh (commercial) |
| IP rating | IP66, outdoor rated |
| Operating temp | -20°C to 55°C |
| Blackout switchover | <10 milliseconds |
At one cycle per day, 6,000 cycles equates to over 16 years of daily use. The 97% depth of discharge means you get to use almost all of the stored energy, unlike some competitors that hold back 10-20%.
On Sigenergy battery dimensions: each module is about the size of a small suitcase and stacks vertically, so a typical 10 kWh or 16 kWh setup takes up roughly the footprint of a bar fridge against your garage wall.
Inverter and Solar
The SigenStor inverter handles both solar conversion and battery management through a single unit. CEC-approved single-phase models are available at 8kW, 10kW, and 12kW, all compliant with AS4777.2:2020.
Peak efficiency sits at 98.5%, which is among the best in class. Multiple MPPTs mean panels on different roof faces can operate independently without dragging each other down.
The DC-coupled architecture is a meaningful advantage: solar charges the battery directly via DC, avoiding the double conversion (DC to AC to DC) that AC-coupled systems require. In practice this means around 2% more of your solar production actually reaches the battery.
Grid switchover during a blackout happens in under 10 milliseconds, fast enough that your lights don't even flicker. Essential circuits stay powered while the system manages load automatically.
Bidirectional EV Charging
The optional DC EV charger is one of SigenStor's standout features. It connects directly to the platform and charges your electric vehicle from solar without converting to AC first, eliminating conversion losses entirely.
At 25kW, it delivers roughly 150km of range per hour of charging. But the real differentiator is that it's bidirectional:
- Vehicle-to-Home (V2H), your car battery can power your house during a blackout or peak tariff period. A typical EV has 60-80kWh of storage, that's potentially days of backup power.
- Vehicle-to-Grid (V2G), your car can feed energy back to the grid during peak demand, earning credits through VPP programs.
This is still uncommon at the residential level. Most home chargers are AC, unidirectional, and operate as a completely separate system from your battery. The Sigenergy EV charger brings it all under one system.
Safety Engineering
Sigenergy uses a six-layer battery protection system:
- Temperature sensors on every cell
- Aerogel insulation between modules
- Internal fire suppression system
- Decompression valves for thermal runaway prevention
- High-temperature insulated pads
- Integrated smoke detectors
Arc-fault detection responds within 500 milliseconds. The IP66 rating means the system is fully sealed against dust and high-pressure water jets, making it suitable for outdoor installation in any Australian climate.
SigenStack: Commercial and Industrial
For larger sites, Sigenergy offers the SigenStack platform with CEC-approved inverters at 50kW, 99.9kW, 110kW, and 125kW. These come in PV-only, hybrid on-grid, and hybrid on/off-grid configurations.
Battery modules scale up to 252kWh per inverter, with up to 100 inverters in parallel for systems reaching 25 MWh. A 20 MWh deployment is already operational in Bulgaria.
EES installs SigenStack systems for commercial clients across the Geelong region. If your business has significant daytime energy consumption and available wall or floor space, this is worth a conversation.
Pricing and Rebates
For a residential SigenStor system in the Geelong area:
| 10 kWh system (installed) | $10,000, $13,000 |
| Additional 5 kWh module | $2,000, $2,500 |
| 8 kWh + 5 kW inverter (excl. install) | From ~$11,000 |
These are real ballpark numbers, your actual Sigenergy battery price in Australia depends on system size, whether you want backup, EV charger inclusion, and what your meter board looks like. We size every system to your actual half-hour power usage, not a guess.
Sigenergy systems are eligible for STCs (Small-scale Technology Certificates) and any applicable Victorian battery rebates, which knock a decent chunk off the upfront cost.
Common Questions
Is Sigenergy CEC-approved in Australia?
Yes. Single-phase inverters at 8kW, 10kW, and 12kW are all CEC-approved and compliant with AS4777.2:2020. The commercial inverter range (50kW to 125kW) is also CEC-approved. This means systems are eligible for STCs and state rebates.
How does the EV charger work with the battery?
The DC charger connects directly to the SigenStor platform. Solar charges the car without converting to AC. The charger is bidirectional: your EV can power your home during outages (V2H) or feed back to the grid (V2G).
Can I add more battery capacity later?
Yes. Add modules without replacing the inverter or rewiring. Each stack takes up to 6 modules, and the system supports up to 5 stacks. The same platform scales from a small home to a light commercial site.
What warranty does Sigenergy offer?
Sigenergy offers a standard warranty with a minimum 70% capacity retention guarantee. The LFP chemistry is rated for over 6,000 cycles. EES provides a separate workmanship warranty on the installation.
Who is behind Sigenergy?
Founded in 2022 by Tony Xu, former president of Huawei's smart solar division. Over 600 employees globally. Number one battery storage supplier in Australia by market share (SunWiz data).
Does Sigenergy support Virtual Power Plants?
Yes. Sigenergy has active VPP operations in Australia, Sweden, Netherlands, and Germany. Your battery can participate in grid services, earning credits for sharing stored energy during peak demand.
Who owns Sigenergy and where is it made?
Sigenergy was founded in 2022 by Tony Xu, former head of Huawei's smart solar and energy storage division. The company has over 600 staff globally and manufactures in China, with local Australian support and distribution. Plenty of Geelong homes are running Sigenergy batteries right now.
Is Sigenergy any good?
Short answer: yes. Sigenergy has been the number one battery storage brand in Australia for ten-plus months running (SunWiz market data). We've installed SigenStor systems across Geelong and the Surf Coast, owners tell us they run quiet, handle a Victorian summer without breaking a sweat, and the mySigen app is genuinely simple to use. That's why we rate Sigenergy as one of the best batteries you can buy in Australia right now.
How much does a Sigenergy battery cost in Australia?
A typical 10 kWh Sigenergy battery in Geelong lands between $10,000 and $13,000 installed, before the Victorian battery rebate and STCs. Prices shift with system size, backup needs, and whether you add the EV charger. We'll walk through your power bills and give you a fixed number on the day, see the pricing table or book a free quote.
Can Sigenergy charge an EV, and what does the Sigenergy gateway do?
Yes, the Sigenergy DC EV charger plugs straight into the SigenStor platform and charges your car from solar without AC conversion losses. It's also bidirectional, so your EV can power your home during a blackout (V2H) or feed the grid (V2G). The Sigenergy gateway is the brains, it handles grid detection, switches to backup in under 10 milliseconds, and decides which circuits stay on when the grid drops.
How does Sigenergy compare to Tesla Powerwall 3 and Sungrow?
All three are solid batteries we'd happily install. Sigenergy's edge is the 5-in-1 SigenStor platform, solar inverter, battery, EV charger, gateway and energy management all in one system, plus dead-easy capacity stacking later. Powerwall 3 has brand recognition and a polished app; Sungrow is a strong value pick. We'll sit down with your bills and your roof and tell you which one actually suits your place best.
What are the Sigenergy battery dimensions, can it be wall-mounted?
SigenStor modules come in 5.38 kWh and 8.06 kWh sizes. The standard install is floor-standing and stackable, each module is roughly the size of a small suitcase. The system is IP66-rated, so it sits happily outdoors on a Geelong wall or inside the garage. We pick the spot that works for your slab, your meter board, and your house.
Interested in a Sigenergy system?
We'll take a look at your power bills, design a Sigenergy battery and inverter setup that fits your home, and give you a fixed quote, no surprises.
