Choose Powerwall 3 when…
You want the integrated Tesla app and a standard 13.5 kWh starting configuration, and your installer confirms the single-phase design meets your backup and output needs. Expansion uses larger steps.
Powerwall 3 profile →Australian battery comparison · Independent editorial
Tesla Powerwall 3 vs Sigenergy SigenStor in Australia
These are different system designs. Powerwall 3 is a simpler 13.5 kWh starting point for a single-phase home; SigenStor offers smaller capacity steps and a three-phase path. The right choice depends on your home, existing solar, backup circuits and an itemised installed quote.
By Patryk Lazarz (TechManPat) · Editorial comparison 23 September 2026. Catalogue profiles last updated 2026-07-10 and 2026-07-10; verify current model, price and approvals before ordering.
What changes the decision?
Choose SigenStor when…
You need a finer capacity fit or a three-phase controller option. Ask the installer to list the exact controller, battery modules, gateway and backup configuration; a bare module price is not an installed system price.
SigenStor profile →Compare the published catalogue fields
| Factor | Powerwall 3 | SigenStor |
|---|---|---|
| Usable capacity range | 13.5–54 kWh | 5.2–48 kWh |
| Capacity increments | 13.5 kWh | 5.2 kWh (catalogue planning figure; check the specified module) |
| Phase options | Single-phase | Single-phase, Three-phase |
| System type | Integrated | Integrated |
| Stated warranty | 10 years | 10 years |
| Backup potential | Whole-home capable | Whole-home capable |
Capacity ranges reflect catalogue configurations; they do not promise every combination is available or approved for your address. Stated warranty years omit throughput, retained capacity, labour and installer conditions. Output, installed cost and backup scope vary with the chosen system design.
What about Tesla Powerwall 3P?
Tesla has announced a separate three-phase Powerwall 3P. Its Australian support page says the 3P is not yet available in Australia or New Zealand, pricing will be shared at launch, and it cannot be combined with Powerwall 3 or Powerwall 2 units. This table compares the currently listed Powerwall 3, not the forthcoming 3P. If three-phase output is central to your decision, ask an installer about the existing design and check Tesla’s 3P availability page ↗ before you commit.
Ask both installers for the same scope
- Quote comparable usable capacity and the exact battery, inverter or controller model.
- Show continuous output, phase arrangement and which circuits remain powered during a grid outage.
- List gateways, meters, switchboard work, monitoring and any required subscriptions.
- Calculate winter solar refill and evening use from your actual interval data, then state the assumptions behind any savings estimate.
- Confirm the current Australian approval listing, warranty terms, service path and final installed price for your address.
Use the battery planner with your household data → · Compare the wider catalogue →
Sources and limits
Specifications and availability in the table come from the dated Compare profiles, checked against these manufacturer pages: Tesla Australia ↗ · Tesla system and expansion details ↗ · Sigenergy Australia ↗ · Sigenergy three-phase configurations ↗. Compare does not publish a winner based on an unverified installer price or untested backup configuration. Neither manufacturer sponsored this comparison.