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Sigenergy's SigenStor has grown quickly in Perth as a high-power, modular alternative to the established Tesla Powerwall 3. Sigenergy is a newer Chinese-made brand built around a flexible inverter-plus-battery tower; Tesla is a premium US-owned all-in-one. This is a fair, spec-led comparison for WA homes — particularly relevant if power output and three-phase or whole-home backup are high on your list. Sigenergy's SigenStor line spans two CEC-approved hardware generations — modules first approved Jan 2024 and a newer generation from Jan 2026 — both remain CEC-active and individually resolvable; see the generation breakdown for what changed.
Quick answer
Sigenergy tends to suit buyers who prioritise power output, three-phase or whole-home backup, and an all-in-one stack, and are comfortable with a fast-growing newer brand. Tesla tends to suit buyers installing solar and battery together who want a single integrated unit and a familiar brand, and are comfortable paying a premium for it. For either brand, WA Battery Scheme eligibility comes from the system's Synergy SSL listing, with up to $1,300 off an eligible battery.
Sources: CEC register · Synergy SSL register · WA Battery Scheme
Specifications, pricing and eligibility change over time — always confirm the current details with your installer.
A rising challenger known for high-power, flexible SigenStor systems that combine inverter, battery and (optionally) EV charging in one stack.
Origin
Chinese-made — a newer but rapidly-growing brand that has gained strong traction in the Perth market.
Architecture
Modular DC-coupled 'tower' (SigenStor) that integrates the hybrid inverter and stackable battery modules, with strong three-phase and backup options at higher configurations.
Strengths
Things to weigh
Australian support
Has an Australian office and is regarded as well-supported locally.
WA rebate
Check the specific SigenStor configuration against Synergy's Supported Solutions List for WA-rebate eligibility — your installer can confirm.
Tends to suit
Buyers who prioritise power output, three-phase or whole-home backup, and an all-in-one stack, and are comfortable with a fast-growing newer brand.
A well-known, popular choice in Perth, positioned at the premium end. Recognised more for its integrated ecosystem and app than for being the cheapest option.
Origin
US-owned — one of the few widely-available batteries not Chinese-made.
Architecture
AC-coupled all-in-one. The Powerwall 3 includes its own inverter, so it works alongside (or in place of) your existing solar inverter rather than needing a separate hybrid unit.
Strengths
Things to weigh
Australian support
Established Australian operations and installer network.
WA rebate
The Powerwall 3's integrated inverter is not on Synergy's SSL, so a Powerwall 3 system is not eligible for the WA Residential Battery Scheme rebate.
Tends to suit
Buyers installing solar and battery together who want a single integrated unit and a familiar brand, and are comfortable paying a premium for it.
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Two modular systems Perth buyers often shortlist together, compared spec by spec.
Retrofit vs new install, efficiency trade-offs, and which brands use each type.
A 10 kWh usable LFP tower that stacks in 5 kWh modules, with a 10-year warranty.
Not sold here and not on the approved-product register, so it earns no rebate.