Chinese manufacturer Sigenergy has unveiled a 401 kWh battery energy storage system for commercial and industrial (C&I) installations.
The company said the SigenCube fully integrates the power conversion, energy management, and batteries in a single cabinet. The modular architecture has been engineered for high scalability and supports up to 100 units in parallel.
Sigenergy, which has established itself as one of Australia’s most popular residential battery suppliers with more than 120,000 systems already installed here, said the product has been designed to satisfy expected growth in the C&I energy storage sector following the federal government’s recent expansion of the small-scale renewable energy scheme (SRES).
The expansion, that took effect on 1 October, lifted the maximum size of solar systems covered under existing Small-scale Technology Certificate mechanism from 100 kW to 1 MW capacity, increasing demand for both solar panels and storage as C&I companies look to generate and store more of their own power.
Will Hall, Managing Director of Sigenergy in Australia and New Zealand, said the changes dictate that the next wave of growth in storage will be commercial.
“Home batteries have gone mainstream in Australia, and businesses now want the same control over their power costs and reliability,” he said. “SigenCube is our answer for the sites where space, noise and heavy loads have held storage back.”
Sigenstore said the SigneCube is built to meet heavy industrial demands. Each ES401 cabinet holds 401 kWh in a 1,100 mm × 2,450 mm × 1,650 mm footprint, delivering an energy density of more than 220 kWh per square metre. The manufacturer said for a 4 MWh project, SigenCube needs 54.5 m², compared with more than 80 m² for traditional solutions, a saving of more than 30%.
“Businesses are not only asking for more kWh. They want a system that fits on a tight site, runs quietly next to its neighbours and keeps the plant going when the grid does not,” Hall said. “That is what SigenCube is built to do.”
Every cabinet has its own energy management system, and up to 100 units can run in parallel without an external data logger. Operating temperatures range from -30°C to 55°C. Units feature AI-assisted thermal management, active battery balancing, and declared sound level below 60 dB.
Protection runs from the battery pack to the whole system, including a top explosion vent, smoke and heat detection, cabinet-level aerosol suppression, a water firefighting interface and multiple layers of overcurrent protection. Asealed cooling loop gives a 10-year coolant life.
Sigenergy said grid-forming capability delivers 0 ms load-side disruption and MWh-level black start without grid support, with SigenCube capable of 150% overload for 10 seconds.
Units are pre-commissioned at the factory, and basic setup and diagnostics take up to five minutes on site through the app.
SigenCube will be available in Australia for off-grid projects and in New Zealand from January 2027. Grid-connected projects in Australia will follow Clean Energy Council listing.
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