Compare like with like. Aligned scores, specifications and local evidence within one scoring class or tier.
Market context
Australia purchasing view
GoodWe | GW5K-SDT-AU30 / GW6K-SDT-AU30 / GW8K-SDT-AU30 / GW9.999K-SDT-AU30 / GW15K-SDT-AU30 / GW20K-SDT-AU30 (three-phase string); scored model GW20K-SDT-AU30
68/ 100
Strong evidence coverage · 100%
Evidence checked 2026-08-02
Available in Australia · checked 2026-08-02
Buyer evidence: Ready (100% direct coverage).
FoxESS | H3-Pro-15.0 (15 kW model in the H3-Pro 15-30 kW range)
74/ 100
Strong evidence coverage · 100%
Evidence checked 2026-08-11
Available in Australia · checked 2026-08-11
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 | SDT G3 | H3-Pro |
|---|---|---|
| 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 | SDT G3 | H3-Pro |
|---|---|---|
| Architecture | Solar-only string inverter | Hybrid inverter |
| Published maximum AC output range | 5–20 kW | Not stated |
| Scored benchmark | 20 kW | 15 kW |
| Power | 20.0 kW | 15.0 kW |
| Type | String | Hybrid |
| Peak eff | 98.6 % (better value on this row) | 98.1 % |
| MPPTs | 3 | 3 |
| Published rated AC power range | Not stated | 6–15 kW |
| Evidence | SDT G3 | H3-Pro |
|---|---|---|
| Outcome | Available in Australia | Available in Australia |
| Checked | 2026-08-02 | 2026-08-11 |
| Certifications | The exact Australian datasheet publishes IEC 62109 and AS/NZS 4777.2 compliance. | The CER export last modified 10 August 2026 lists exact H3-Pro-15.0 through 21 January 2029., The current Australian datasheet and manual identify H3-Pro-15.0 as a three-phase storage inverter. |
| Warranty scope | Australia; GoodWe's standard terms provide five years of full inverter cover plus a further five years of replacement-parts cover for eligible SDT units, subject to registration and terms. | The current Australian warranty expressly includes H3-Pro-15.0. The standard term is 120 months from installation, capped at 132 months after manufacture. Conditional service-rebate and transport provisions do not establish unrestricted labour or freight cover. |
| Warranty remedy | Repair, parts supply or replacement at GoodWe's option. | FoxESS may repair onsite or at a service centre, or replace with the closest current product. |
| Labour and reinstallation | Service scope during promotional years is not clearly promised. Removal and reinstallation are not an unconditional entitlement. | An installer service rebate may be approved, but its amount and eligible work are not stated; travel, onsite installation, modification and maintenance are excluded. Unrestricted removal and reinstallation cover is not stated. |
| Freight | Freight scope during promotional years is not clearly promised. | Eligible road transport to one specified address may be provided; express and onward shipping are excluded. |
| Transfer and registration | No subsequent-owner transfer right was found in the governing terms. Any ten-year promotion requires eligible installation, registration and SEMS connection. | No automatic subsequent-owner transfer right is stated. Registration is recommended for standard cover and required for FoxPlus; the FoxPlus section contains a conflicting 72-month standard-period reference. |
| Grid compatibility | Three-phase 400 V Australian string-inverter family with AS/NZS 4777.2 compliance. | Three-phase Australian identity. CER product listing does not establish DNSP, site, export-limit, installation or commissioning approval. |
| 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 | GoodWe Australia publishes the exact SDT G3 family and local warranty terms. | FoxESS Australia publishes the exact product family and support materials. External switching and battery requirements remain outside this independent inverter record. |
| Register: parts term | Not in the structured register | stated: The exact H3-Pro family receives 120 months from installation, no later than 132 months after manufacture, whichever occurs first. |
| Register: labour and service | Not in the structured register | conditional: FoxESS may repair onsite or at a service centre, replace the product, and approve an installer service rebate. The rebate amount and eligible work are not stated, while travel, onsite installation, modification and maintenance are excluded. |
| Register: transport and freight | Not in the structured register | conditional: Eligible road transport to one specified address may be provided. Express freight and onward shipping are excluded. |
| Register: registration | Not in the structured register | conditional: Registration is recommended for the standard term and required for FoxPlus. The policy's FoxPlus wording also refers to a 72-month standard period, which conflicts with the exact 120-month H3-Pro table. |
| Register: transferability | Not in the structured register | not stated: The policy defines purchaser, installer and end-user roles but does not state an automatic subsequent-owner transfer right. |
| Register: explicit unknowns | Not in the structured register | 4 retained |
| Latest reviewed Approval Watch event | No exact-identity event in reviewed history | No exact-identity event in reviewed history |
| Sources | Source 1Source 2Source 3Source 4 | Source 1Source 2Source 3Source 4Source 5Source 6 |
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 Value & Volume class, on the same rubric weighting. Scores are not comparable across classes or tiers. Full methodology.