Sigenergy's commercial battery system, the SigenStack, received CEC approval for Australian installation on 20 April 2026. If you run a business with serious energy costs, it is worth paying attention to.
What it is
The SigenStack is a commercial and industrial battery storage system built for medium to large operations. It is not a scaled-up residential system. The battery chemistry is lithium iron phosphate, which handles heat better and has a longer cycle life than older lithium chemistries. For a commercial site where the system is charging and discharging daily, that matters more than it does in a residential install.
Inverter Range (CEC Approved in Australia)
- Hybrid inverters: 50kW, 60kW, 80kW, 100kW, 110kW, and 125kW
- Approved for commercial solar and storage projects
- 110kW model is the most compact in its class
Battery Capacity
- 12kWh battery modules, stackable
- Up to 253kWh per inverter
- Up to 100 inverters in parallel
- Maximum system capacity: 25MWh
Most businesses will need a fraction of that maximum capacity, but the modular design means you start at the right size and expand later without replacing what you have already installed.
Why demand charges matter
Demand charges are the part of the electricity bill most commercial operators do not focus on enough. They can make up 30 to 60 percent of your total bill depending on your setup, and they are calculated differently to your consumption charges. Most tariffs set your demand charge based on the highest amount of power you draw in any 15 or 30 minute window during a billing period. One spike early in the month can set your rate for the entire period.
The SigenStack addresses this by storing energy when demand is low and discharging when demand is about to peak, flattening that spike before it registers. The system needs to be configured around your actual usage patterns to do this well. An installation that is not properly set up for your load profile will not deliver the savings you are expecting.
For sites with existing solar, the SigenStack captures generation that would otherwise be exported at a low feed-in tariff and holds it for peak periods when drawing from the grid costs the most. Most commercial feed-in rates in Queensland are well under 10 cents per kWh. Peak grid rates can be several times that. Storing and self-consuming that energy is straightforwardly better than exporting it.
Peak Shaving
Store energy during low-demand periods and discharge at peak to reduce demand charges, which can be 30 to 60 percent of your electricity bill.
Scalable Capacity
Start at the right size for now and expand later. The modular design means no infrastructure replacement when you grow.
Solar Integration
Store excess daytime solar generation and use it during peak periods instead of exporting at a low feed-in rate.
Backup Power
If the grid goes down, the system keeps operating without manual intervention. For cold storage and manufacturing, that is not a minor feature.
Smart Energy Management
The system optimises charging and discharging based on pricing signals, solar production, and your consumption patterns.
Modular and Expandable
Add battery capacity as your energy use grows. You are not locked into the initial design.
What the return looks like
The ROI on these systems typically falls between 3 and 7 years, depending on your usage profile, current tariff structure, and how much solar you have or plan to install. That range is wide for a reason. A business on a high demand tariff with large, predictable spikes and good solar exposure will see a faster return than one on a flat tariff with variable usage. The numbers need to be modelled against your actual bills before you commit.
There are also depreciation and tax incentives worth factoring in. These change, so get current advice on what applies to your situation. For most commercial installations, they improve the return meaningfully.
Who it suits
SigenStack is a good fit for:
- Manufacturing facilities with high or variable daytime energy consumption
- Warehouses and logistics centres with large roof space for solar
- Retail and shopping centres looking to cut operating costs
- Office buildings with predictable energy patterns
- Cold storage facilities requiring reliable power around the clock
- Data centres needing uninterrupted backup capacity
Why Sigenergy
We have been installing Sigenergy's residential systems on the Sunshine Coast and have been satisfied with the product and the local support. The SigenStack is a natural extension of that into commercial scale. Lithium iron phosphate chemistry, 10-plus year warranties, and solid monitoring infrastructure. The C&I range approval in Australia follows the residential systems establishing themselves here, so this is not a product being launched cold into a new market.
Want to Know if SigenStack Makes Sense for Your Site?
We assess your site, look at your bills, and design a system around what is actually happening with your energy use. That includes inverter sizing, battery capacity, solar integration, and how the system gets configured to target the charges that matter most for your operation.
What we cover:
- Site assessment and energy analysis
- System design tailored to your load profile
- Professional installation and commissioning
- After-sales support
Get in touch and we can go through the numbers with you.
About the Author
Director, Flux Electrical Systems
Licensed electrician and founder of Flux Electrical on the Sunshine Coast. 15+ years in solar and battery contracting. Electrical Licence 121082. SAA Accredited for solar, on-grid batteries, and off-grid systems.