The assessment
How it scores, by category
Market position
The data
Solar module
Produces DC electricity at the roof. It contains no system-level power conversion or storage.
- Product role
- None in the module.
- Published range
- 645–660 W
- Electrical layer
- DC module output
- Construction
- Bifacial, Dual-glass
Performance guarantee: 30-year linear output
Wattage figure based on the sourced rated power (660 W) applied to the guaranteed floor; modular/format differences aside, this is the same rated-power spec shown above.
Modelled effective output, year by year
Year 1 to year 25. Rated 660 W at STC.
How this is modelled
Modelled from this panel’s own published first-year (1%) and annual (0.35%/yr) degradation figures, compounded against its 660 W rated (STC) output. This is a datasheet-derived estimate, not a field measurement or a warranty guarantee. Actual output also depends on site irradiance, temperature, soiling and system design.
| Year | 1 | 5 | 10 | 15 | 20 | 25 |
|---|---|---|---|---|---|---|
| Watts | 653 W | 644 W | 633 W | 621 W | 610 W | 598 W |
| % of rated | 99.0% | 97.6% | 95.8% | 94.1% | 92.3% | 90.6% |
Verification & sources
Market context
Global evidencechange in the site menu
Global benchmark. This scorecard is benchmarked globally. A global score does not imply local availability, certification, warranty coverage, or installer compatibility.
Benchmark anchor. The score uses the highest exact bin inside the retained Australian regulator intersection. Scored model: AIKO-A660-GRH66Dw · checked 2026-08-21. Evidence.
Sources & references · checked 2026-09-01
Strong evidence coverage
18 of 18 scored criteria link directly to a published source.
Values marked estimated, derived, or not found remain visible on the audit sheet and do not carry the same evidential weight as a linked source. Coverage measures direct links, not an independent guarantee that a claim is correct.
How far the evidence reaches
- OutputThird-party source1 of 5 rows in the rings beyond claim4 warranty terms beside the rings
- EnduranceManufacturer claim3 rows in the rings
- SafetyNot assessed for panels
- BackingWarranty terms: the maker's commitment2 warranty terms beside the rings
- FitManufacturer claim1 row in the rings3 design facts beside the rings
- FootprintNot assessed for panels
Rings, outside in: manufacturer claim, certified or regulator-listed, third-party source. The centre is review.solar's own measurement, empty for every product today. Warranty terms and design facts that rest on the maker's own word are counted beside the rings; a reviewed absence, or one that reaches beyond the maker's claim, stays in them. How the evidence puzzle works
Record revision. Built from the exact manufacturer sheet and the CER export checked 2026-08-12. The global sheet spans 645-680 W; the retained Australian intersection is 645-660 W. GRH66Dw also labels another current Stellar generation, but the 75 +/- 5% bifacial factor and +85 C upper operating limit make this a distinct evidence object. First-market US and DE overlay review 2026-09-01: official regional catalogues recorded; Australian overlays and scores unchanged.
- Sourced valuesData card →
- Archived copy of the primary sourcePDF ↗
Show 2 more
- Independent energy yieldManufacturer ↗
- Independent energy yieldIndustry report ↗
Product record history
2 changes to this record · 6 products changed in this update
AU Warranty scope
- Before
- The Utility-Scale Module Warranty 1.6 names GRH66Dw and provides 15 years of product cover and 30 years of performance cover.
- After
- The N-Type ABC Module Warranty, Standard Modules (file named Utility-Scale-Module-Warranty-1.6-EN; the printed text shows no version or date) names AIKO-Axxx-GRH66Dw and provides 15 years of product cover and 30 years of performance cover.
AU Warranty conditions
- Current text
- labour: Removal, installation and reinstallation are borne by the customer.; registration: Claims must be made in writing within 30 days of awareness and include serial numbers, purchase evidence and supporting defect evidence.; remedy: Where AIKO determines that a defect is caused by its materials or process, or a jointly selected third-party test finds AIKO responsible, AIKO chooses between repair, replacement and refund (clause 4). A refund is the residual value of the defective module or the value of the power shortfall, calculated from the contract price per watt.; removal reinstallation: Removal and reinstallation are borne by the customer.; transferability: Transfer requires AIKO's agreement and a signed tripartite agreement, and the modules must remain at the original location.; transport: Freight follows the original trade terms; testing and inspection freight is covered only where AIKO is found responsible.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
AU market evidenceAU market evidence+5 in JSON record
1 change to this record · 4 products changed in this update
AU Certifications
- Current text
- The CER approved PV module list, export last modified 24 September 2026 and read on 6 October 2026, lists AIKO-A645-GRH66Dw, AIKO-A650-GRH66Dw, AIKO-A655-GRH66Dw and AIKO-A660-GRH66Dw (model strings suffixed IEC 61215-2021), each approved 12 June 2025 and expiring 12 June 2028, with fire tested recorded as Yes. AIKO-A640-GRH66Dw is also listed on the same terms. The registry model string is shared by manufacturer-published generations, so the exact datasheet remains part of the identity evidence.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
AU market evidenceAU market evidence+5 in JSON record
3 changes to this record · 8 products changed in this update
AU Evidence sources
- Before
- https://aikosolar.com/wp-content/uploads/2025/10/Stellar-1N66_AIKO-A-GRH66Dw-645-680W_2382x1134x30mm_V4.1_202510_DsDr_EN.pdf; https://aikosolar.com/wp-content/uploads/2025/11/Utility%E2%80%91Scale-Module-Warranty-1.6-EN.pdf; https://cer.gov.au/document/cec-approved-pv-modules-0; https://cer.gov.au/document_page/cec-approved-pv-modules
- After
- https://aikosolar.com/au/products/; https://aikosolar.com/au/products/stellar-1nplus66-dual-glass/; https://aikosolar.com/wp-content/uploads/2025/06/Stellar-1NPlus66_AIKO-A-GRH66Dw-635-665W_2382x1134x30mm_V1.1_202501_DsDr_EN.pdf.pdf; https://aikosolar.com/wp-content/uploads/2025/10/Stellar-1N66_AIKO-A-GRH66Dw-645-680W_2382x1134x30mm_V4.1_202510_DsDr_EN.pdf; https://aikosolar.com/wp-content/uploads/2025/11/Utility%E2%80%91Scale-Module-Warranty-1.6-EN.pdf; https://cer.gov.au/document/cec-approved-pv-modules-0; https://cer.gov.au/document_page/cec-approved-pv-modules
AU Certifications
- Current text
- The CER approved PV module list, export last modified 24 September 2026 and read from the pinned state on 6 October 2026, lists AIKO-A645-GRH66Dw, AIKO-A650-GRH66Dw, AIKO-A655-GRH66Dw and AIKO-A660-GRH66Dw (model strings suffixed IEC 61215-2021), each approved 12 June 2025 and expiring 12 June 2028, with fire tested recorded as Yes. AIKO-A640-GRH66Dw is also listed on the same terms. The registry model string is shared by manufacturer-published generations, so the exact datasheet remains part of the identity evidence.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
AU market evidenceAU market evidence+5 in JSON recordAU Support Note
- Before
- The approval model code is current, but it does not distinguish AIKO's 1N+66 and 2N+66 catalogue labels. Exact distributor stock and continuous availability remain unknown.
- After
- The approval model code is current, but it does not distinguish AIKO's 1N+66 and 2N+66 catalogue labels. AIKO's Australian catalogue lists Stellar 1N+66 as 635 W to 665 W and links a separate Australian-market datasheet (V1.1_202501, marked AU market only) that lists AIKO-A640-GRH66Dw to AIKO-A660-GRH66Dw with a 55 +/- 5% Pmax bifaciality figure and different 660 W electrical values (Voc 49.50 V). The global sheet used for this record (V4.1_202510) lists a 75 +/- 5% bifacial factor and Voc 49.90 V for the same model code. Which sheet describes modules supplied in Australia is not publicly established. Exact distributor stock and continuous availability remain unknown.
9 changes to this record · 152 products changed in this update
US Support Note
- Before
- Not previously recorded
- After
- aikosolar.com/us/products/ serves the English global product index (canonical /en/products/), not a United States catalogue. AIKO-A660-GRH66Dw is not named on a US-specific sale path. The Australian N-Type ABC warranty is not transferred.
DE Evidence sources
- Before
- Not previously recorded
- After
- https://aikosolar.com/de/products/
DE Support Note
- Before
- Not previously recorded
- After
- aikosolar.com/de/products/ lists STELLAR 1N+66 Doppelglas 645W-680W as Auslaufmodell. It does not offer a current German product page for AIKO-A660-GRH66Dw. Remaining-stock Auslaufmodell availability is not inferred. Stellar 2N+66 also uses GRH66Dw and is not transferred onto this 1N+66 record.
US Evidence sources
- Before
- Not previously recorded
- After
- https://aikosolar.com/en/products/; https://aikosolar.com/us/products/
Source revision
- Current text
- Built from the exact manufacturer sheet and the CER export checked 2026-08-12. The global sheet spans 645-680 W; the retained Australian intersection is 645-660 W. GRH66Dw also labels another current Stellar generation, but the 75 +/- 5% bifacial factor and +85 C upper operating limit make this a distinct evidence object. First-market US and DE overlay review 2026-09-01: official regional catalogues recorded; Australian overlays and scores unchanged.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheet
2 changes to this record · 109 products changed in this update
5 changes to this record · 118 products changed in this update
Independent energy yield
- Before
- Not previously recorded
- After
- Brand or series yield-tested; exact model not covered
Independent energy yield: Evidence sources
- Before
- Not previously recorded
- After
- https://aikosolar.com/au/news-aiko-claims-top-spot/; https://www.pv-magazine.com/2023/11/09/pv-magazine-test-september-2023-results/
Independent energy yield: Evidence status
- Before
- Not previously recorded
- After
- sourced
1 change to this record · 8 products changed in this update
Product record
kind: panel; brand: AIKO; name: Stellar 1N+66 Dual-Glass; model: AIKO-A645-GRH66Dw through AIKO-A660-GRH66Dw (132 half-cells, N-type ABC rear-contact, bifacial dual glass); scored model AIKO-A660-GRH66Dw; score: 68.3
Primary datasheet
This is review.solar's publication history. It does not claim the product changed on the recorded date, and it excludes compatibility, system pairing, installation suitability and relative leaderboard prose. Open the complete JSON record.
Evidence timeline
Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.
- Core scorecard evidence checked
- DE market evidence checked
- US market evidence checked
- AU market evidence checked
- Series benchmark evidence checked
Scored by Solar Analytica Research
Further reading from Findings
- What changed in the benchmark in August 2026. · 7 min read
Stay across the benchmark.
New scorecards, score changes and market signals, published as they happen.
Our reading
Stellar 1N+66 Dual-Glass scores 66, placing 33 of 53 in the Premium Performance class against a class average of 67.9. Its strongest scoring dimension is architecture & design (94), running 8.0 points above the class average on this dimension. Guarantee & Backbone scores 44, the lowest pillar for this product. The class average on guarantee & backbone is 55. Underlying specifications include a module efficiency of 24.4%, N-type ABC cell technology, 15-year product warranty backed by a 30-year performance term.
Dietreich Farquharson · review.solar