Overview
Three-phase power is standard in most Australian homes built in the last 20 years, and many older homes that have been upgraded. For three-phase households, the SigenStor TP 16kWh offers something most competitors cannot: true 10kW three-phase continuous output, meaning 3.33kW per phase — enough to supply meaningful loads on all three phases simultaneously during a grid outage.
Single-phase batteries installed in three-phase homes typically only back up one phase. The TP eliminates this limitation entirely.
At $9,200, the TP carries a $1,500 premium over the SP single-phase variant, which is reasonable given the three-phase output capability.
Pricing & Installation
Indicative installed cost: $13,500–$18,000
Three-phase installation is inherently more complex than single-phase, requiring a qualified electrician familiar with three-phase switchboard work and the SigenStor system. Ensure your installer holds CEC accreditation and three-phase experience.
The V2H module (additional cost) is equally compelling for three-phase homes — a 25kW bidirectional V2H system on three-phase enables extremely high discharge rates that can power virtually any residential load.
Performance & Output
10kW continuous / 15kW peak across all three phases. In practice, this means:
- 3.33kW per phase continuously
- Running a ducted system, pool pump, fridge, lighting, and appliances simultaneously across a large home during blackout
This is the highest three-phase continuous output of any residential battery system currently available in Australia.
Storage Capacity
Identical to the SP: 15.6kWh usable, expandable to 54kWh. The three-phase output upgrades the power capability without changing capacity.
Backup & Blackout Protection
Whole-home three-phase backup is the TP’s key selling point. During extended blackouts affecting large homes with multiple circuits, the TP ensures no phase is left unprotected. Grid-forming capability with sub-20ms switchover.
IP66 rated — same as the SP, suitable for outdoor installation.
Compatibility
AC+DC coupling flexibility applies to the TP as well. Compatible with three-phase Sigenergy inverters and, via AC coupling, with most existing three-phase solar inverters.
Warranty & Support
10-year product warranty with the same throughput guarantees as the SP.
Verdict
For three-phase Australian homes, the SigenStor TP is the best available option in 2026. The 10kW three-phase output is unmatched, the V2H option is compelling, and the coupling flexibility removes inverter lock-in concerns. Sigenergy’s growing installer presence makes it increasingly accessible.
Best for: Three-phase homes, large properties, EV households wanting whole-home three-phase backup.
Frequently Asked Questions
How do I know if my home is three-phase? Check your switchboard — three-phase homes have a main switch with three separate 10–20A circuit breakers feeding different areas. Your electrician can confirm.
Does the TP cost significantly more to install than the SP? Yes, typically $1,000–$2,000 more in labour due to three-phase switchboard complexity.
Can I use the TP in a single-phase home? The TP is designed for three-phase. Using it in a single-phase home wastes capability; the SP would be more appropriate and cheaper.
