Compare like with like. Aligned scores, specifications and local evidence within one scoring class or tier.
Market context
Australia purchasing view
Sigenergy | SigenStor EC 10.0 SP
76/ 100
Strong evidence coverage · 100%
Evidence checked 2026-08-02
Available in Australia · checked 2026-08-02
Buyer evidence: Ready (100% direct coverage).
Tesla | Powerwall 3
74/ 100
Strong evidence coverage · 100%
Evidence checked 2026-08-06
Available in Australia · checked 2026-08-04
Buyer evidence: Ready (100% direct coverage).
marks the better value on rows where a higher number is better. Temperature coefficient counts as higher when it is closer to zero. Size measures such as rated power carry no marker, because a larger product is a different choice rather than a better one.
| Measure | SigenStor EC 10.0 SP | Powerwall 3 Integrated Inverter |
|---|---|---|
| Efficiency | ||
| Design & Flexibility | ||
| Thermal & Physical Resilience | ||
| Features & Integration | ||
| Safety & Compliance | ||
| Guarantee & Backbone | ||
| Energy Ecosystem |
marks the better value on rows where a higher number is better. Temperature coefficient counts as higher when it is closer to zero. Size measures such as rated power carry no marker, because a larger product is a different choice rather than a better one.
| Measure | SigenStor EC 10.0 SP | Powerwall 3 Integrated Inverter |
|---|---|---|
| Architecture | Hybrid inverter | Hybrid inverter |
| Published rated AC power range | 10 kW | 11.04 kW |
| Power | 10.0 kW | 11.04 kW |
| Type | Hybrid | Hybrid |
| Peak eff | 97.6 % (better value on this row) | 97.5 % |
| MPPTs | 4 (better value on this row) | 3 |
| Evidence | SigenStor EC 10.0 SP | Powerwall 3 Integrated Inverter |
|---|---|---|
| Outcome | Available in Australia | Available in Australia |
| Checked | 2026-08-02 | 2026-08-04 |
| Certifications | AS/NZS 4777.2:2020, IEC 62109.1, IEC 62109.2 | AS/NZS 4777.2, IEC 62109-1/-2, IEC 62619, UL 9540A unit-level fire test |
| Warranty scope | Australia and New Zealand factory limited warranty: 10 years for the Sigen Energy Controller. The exact SigenStor EC 10.0 SP AU is named in the covered-model list. | Tesla's Australian owner-document library publishes a 10-year Powerwall warranty. The integrated solar inverter is part of the Powerwall 3 system rather than a separately warrantied standalone inverter. |
| Warranty remedy | On-site repair or replacement for an accepted claim. | Repair, replacement or market-value refund at Tesla's option. |
| Labour and reinstallation | Necessary approved labour and basic travel are covered. Approved removal and reinstallation are covered. | Unconditional labour cover is not stated. Removal and reinstallation are not expressly covered; unapproved relocation can void cover. |
| Freight | Normal freight is covered. | Unconditional freight cover is not stated. |
| Transfer and registration | Transfers with the equipment while it remains at the original installation site. A five-year extension to 15 years must be activated within 12 months. | A subsequent owner may claim for the remaining term with proof of ownership. Registration and internet connectivity conditions apply; no extension was found. |
| Grid compatibility | The Clean Energy Council lists the exact SigenStor EC 10.0 SP AU (AS4777-2 2020) as an approved single-phase PV-and-battery inverter, with a listed expiry date of 4 March 2028 when checked. | Single-phase 230 V integrated system certified for Australia and New Zealand. Tesla publishes 5 kW, 10 kW and 11.04 kW configured outputs, with the final on-grid limit dependent on local conditions and approved system design. |
| Local product pathway | No separate local pathway recorded | No separate local pathway recorded |
| Buyer evidence | Ready (100% direct coverage): Local availability, buyer evidence, and the publication threshold are confirmed. | Ready (100% direct coverage): Local availability, buyer evidence, and the publication threshold are confirmed. |
| Safety notice | No model-specific notice recorded | No model-specific notice recorded |
| Review note | CEC listings are dynamic. Verify current approval, network requirements, and any local configuration requirements immediately before installation. | Tesla Australia publishes the exact AU/NZ datasheet and directs buyers to a Tesla Certified Installer. The inverter cannot be purchased or compared as a standalone unit. The AU/NZ datasheet's System Technical Specifications table lists Backup Gateway 2 as the sole Supported Islanding Device for this market; it is a separate accessory sold and specified on its own, not integrated into Powerwall 3. Gateway 3 is a North American accessory (part number 1841000-01-y per the North American datasheet) not offered as a supported islanding device on the AU/NZ datasheet. |
| Sources | Source 1Source 2Source 3Source 4Source 5 | Source 1Source 2Source 3 |
These checks sit beside the benchmark score. They are site, tariff and contract questions that no product score can settle.
Ask for every model number to appear on the quote and order. The Clean Energy Council product lists are live: STC creation requires listed products at installation, and network requirements may also depend on current approval.
Have the retailer state the supply phase, inverter connection limit, export limit and any export-control cost. The local network connection agreement, not a generic datasheet, determines those settings. See the Australian Government's connection guidance.
Ask which bills or interval data, tariff, feed-in rate, export limit and future loads support the savings and payback claim. Self-consumed electricity and tariff timing usually matter more than a headline feed-in rate. See the system sizing and battery savings guidance.
Confirm the proposed inverter phase, PV input design, battery pairing and export-control configuration against the final connection agreement. A suitable product can still require a different site design or control setting.
Keep the retailer, installer, manufacturer warranty and escalation path in the contract. Australian Consumer Law guarantees apply separately from any manufacturer warranty; where one business supplied both product and installation, it is generally responsible for the remedy. See the ACCC guidance.
A score lead is only meaningful inside this shared class or tier. Weigh it against the specification and evidence rows above before deciding.
Both products are scored in the Integrated System class, on the same rubric weighting. Scores are not comparable across classes or tiers. Full methodology.