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Compare like with like. Aligned scores, specifications and local evidence within one scoring class or tier.

Market context

Australia purchasing view

Inverter

SigenStor EC TP

Sigenergy

76/ 100

Superior

Strong evidence coverage · 100%

Evidence checked 2026-08-02

Available in Australia · checked 2026-08-02

Buyer evidence: Ready (100% direct coverage).

IP66 RatedWhole-Home Backup
Full scorecard
Inverter

ET G2

GoodWe

81/ 100

Superior

Strong evidence coverage · 100%

Evidence checked 2026-08-02

Available in Australia · checked 2026-08-02

Buyer evidence: Ready (100% direct coverage).

Fanless DesignAFCI IntegratedIP66 RatedWhole-Home Backup
Full scorecard
Side by side

Score profile

MeasureSigenStor EC TPET G2
Efficiency71 / 10070 / 100
Design & Flexibility82 / 10082 / 100
Thermal & Physical Resilience81 / 10090 / 100
Features & Integration90 / 10090 / 100
Safety & Compliance70 / 10087 / 100
Guarantee & Backbone61 / 10080 / 100
Energy Ecosystem72 / 10064 / 100

Efficiency

SigenStor EC TP
71 / 100
ET G2
70 / 100

Design & Flexibility

SigenStor EC TP
82 / 100
ET G2
82 / 100

Thermal & Physical Resilience

SigenStor EC TP
81 / 100
ET G2
90 / 100

Features & Integration

SigenStor EC TP
90 / 100
ET G2
90 / 100

Safety & Compliance

SigenStor EC TP
70 / 100
ET G2
87 / 100

Guarantee & Backbone

SigenStor EC TP
61 / 100
ET G2
80 / 100

Energy Ecosystem

SigenStor EC TP
72 / 100
ET G2
64 / 100
Side by side

Key specifications

MeasureSigenStor EC TPET G2
Published rated AC power range5–12 kW6–15 kW
Scored benchmark12 kW15 kW
Power12.0 kW15.0 kW
TypeHybridHybrid
Peak eff98.3 %98.2 %
MPPTs33

Published rated AC power range

SigenStor EC TP
5–12 kW
ET G2
6–15 kW

Scored benchmark

SigenStor EC TP
12 kW
ET G2
15 kW

Power

SigenStor EC TP
12.0 kW
ET G2
15.0 kW

Type

SigenStor EC TP
Hybrid
ET G2
Hybrid

Peak eff

SigenStor EC TP
98.3 %
ET G2
98.2 %

MPPTs

SigenStor EC TP
3
ET G2
3
Local evidence

Australia evidence

EvidenceSigenStor EC TPET G2
OutcomeAvailable in AustraliaAvailable in Australia
Checked2026-08-022026-08-02
CertificationsIEC 62109.1, IEC 62109.2, AS/NZS 4777.2:2020The Australian CEC approved-inverter export dated 22 July 2026 lists exact GW6000-ET-20, GW8000-ET-20, GW9900-ET-20, GW12K-ET-20 and GW15K-ET-20 models to AS/NZS 4777.2:2020 through 29 October 2027., The exact system manual lists IEC 62109-1/-2 and multiple national grid codes.
Warranty scopeAustralia and New Zealand; the Sigen Energy Controller has a ten-year warranty and the specific-model list covers the SigenStor EC 5.0-12.0 TP AU family, notwithstanding typographical inconsistencies in the table.Australia and New Zealand; GoodWe's current Rev 5.8 limited warranty explicitly places ET G2 under 10 years of cover for eligible products.
Warranty remedyConfiguration repair, software update, parts repair or functionally equivalent replacement at Sigenergy discretion.Configuration change, repair or replacement at GoodWe's discretion.
Labour and reinstallationOnsite repair, removal and reinstallation labour are covered. Covered as onsite labour, subject to the validated claim process.GoodWe may provide authorised on-site service or a conditional service rebate. On-site labour support is conditional and requires prior authorisation.
FreightNormal ground freight, customs duties and return freight are covered.Normal ground transport is covered up to GoodWe's stated case limit.
Transfer and registrationTransfer is permitted at the original installation site. The term begins from installation and registration, invoice evidence, or the fallback manufacturing-date rule.No express subsequent-owner transfer right was found in the governing terms. The standard ET G2 term is listed as 10 years; claim and monitoring conditions in the governing terms still apply.
Grid compatibilityThe CEC lists the exact SigenStor EC 12.0 TP AU as a three-phase PV-and-battery grid-connect inverter under certificate EESS-240671-0, with a listed expiry of 7 April 2028 when checked.Three-phase 380/400 V hybrid family with exact-model CEC listings. DNSP acceptance, export settings, battery pairing and backup design remain installation-specific.
System fitConfirmed: SigenStor BAT 5.0 / BAT 8.0Confirmed: GoodWe Lynx Home F G2
Local product pathwayNo separate local pathway recordedNo separate local pathway recorded
Buyer evidenceReady (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 noticeNo model-specific notice recordedNo model-specific notice recorded
Review noteThe 12.0 TP AU is the scored benchmark for this 5-12 kW family. CEC listings are dynamic. Verify current approval, network export settings, compatible battery stack, gateway configuration and warranty coverage immediately before installation.The 15 kW GW15K-ET-20 is the scored series benchmark. CEC listings are dynamic and should be checked before installation.
SourcesSource 1Source 2Source 3Source 1Source 2Source 3Source 4Source 5

Outcome

SigenStor EC TP
Available in Australia
ET G2
Available in Australia

Checked

SigenStor EC TP
2026-08-02
ET G2
2026-08-02

Certifications

SigenStor EC TP
IEC 62109.1, IEC 62109.2, AS/NZS 4777.2:2020
ET G2
The Australian CEC approved-inverter export dated 22 July 2026 lists exact GW6000-ET-20, GW8000-ET-20, GW9900-ET-20, GW12K-ET-20 and GW15K-ET-20 models to AS/NZS 4777.2:2020 through 29 October 2027., The exact system manual lists IEC 62109-1/-2 and multiple national grid codes.

Warranty scope

SigenStor EC TP
Australia and New Zealand; the Sigen Energy Controller has a ten-year warranty and the specific-model list covers the SigenStor EC 5.0-12.0 TP AU family, notwithstanding typographical inconsistencies in the table.
ET G2
Australia and New Zealand; GoodWe's current Rev 5.8 limited warranty explicitly places ET G2 under 10 years of cover for eligible products.

Warranty remedy

SigenStor EC TP
Configuration repair, software update, parts repair or functionally equivalent replacement at Sigenergy discretion.
ET G2
Configuration change, repair or replacement at GoodWe's discretion.

Labour and reinstallation

SigenStor EC TP
Onsite repair, removal and reinstallation labour are covered. Covered as onsite labour, subject to the validated claim process.
ET G2
GoodWe may provide authorised on-site service or a conditional service rebate. On-site labour support is conditional and requires prior authorisation.

Freight

SigenStor EC TP
Normal ground freight, customs duties and return freight are covered.
ET G2
Normal ground transport is covered up to GoodWe's stated case limit.

Transfer and registration

SigenStor EC TP
Transfer is permitted at the original installation site. The term begins from installation and registration, invoice evidence, or the fallback manufacturing-date rule.
ET G2
No express subsequent-owner transfer right was found in the governing terms. The standard ET G2 term is listed as 10 years; claim and monitoring conditions in the governing terms still apply.

Grid compatibility

SigenStor EC TP
The CEC lists the exact SigenStor EC 12.0 TP AU as a three-phase PV-and-battery grid-connect inverter under certificate EESS-240671-0, with a listed expiry of 7 April 2028 when checked.
ET G2
Three-phase 380/400 V hybrid family with exact-model CEC listings. DNSP acceptance, export settings, battery pairing and backup design remain installation-specific.

System fit

SigenStor EC TP
Confirmed: SigenStor BAT 5.0 / BAT 8.0
ET G2
Confirmed: GoodWe Lynx Home F G2

Local product pathway

SigenStor EC TP
No separate local pathway recorded
ET G2
No separate local pathway recorded

Buyer evidence

SigenStor EC TP
Ready (100% direct coverage): Local availability, buyer evidence, and the publication threshold are confirmed.
ET G2
Ready (100% direct coverage): Local availability, buyer evidence, and the publication threshold are confirmed.

Safety notice

SigenStor EC TP
No model-specific notice recorded
ET G2
No model-specific notice recorded

Review note

SigenStor EC TP
The 12.0 TP AU is the scored benchmark for this 5-12 kW family. CEC listings are dynamic. Verify current approval, network export settings, compatible battery stack, gateway configuration and warranty coverage immediately before installation.
ET G2
The 15 kW GW15K-ET-20 is the scored series benchmark. CEC listings are dynamic and should be checked before installation.

Sources

SigenStor EC TP
Source 1Source 2Source 3
ET G2
Source 1Source 2Source 3Source 4Source 5
Australia purchase checks

Make the shortlist quote-ready

These checks sit beside the benchmark score. They are site, tariff and contract questions that no product score can settle.

  1. Lock the exact model and installation-date listing.

    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.

  2. Obtain the site-specific connection settings.

    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.

  3. Test savings against the household, not a brochure.

    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.

  4. Specify the operating outcome.

    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.

  5. Name the party responsible after installation.

    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.

Decision snapshot

Where the comparison separates

OverallET G2 leads the global score by 5 points.
Strongest dimensionsSigenStor EC TP: Features & Integration · ET G2: Thermal & Physical Resilience
Largest differenceET G2 has the largest pillar edge in Guarantee & Backbone (19 points).
Market evidenceSigenStor EC TP: buyer ready · ET G2: buyer ready

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 Inverter class, on the same rubric weighting. Scores are not comparable across classes or tiers. Full methodology.