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
- 700–735 W
- Electrical layer
- DC module output
- Construction
- Bifacial, Dual-glass
Performance guarantee: 30-year linear output
Wattage figure based on the sourced rated power (735 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 735 W at STC.
How this is modelled
Modelled from this panel’s own published first-year (1%) and annual (0.375%/yr) degradation figures, compounded against its 735 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 | 728 W | 717 W | 703 W | 689 W | 675 W | 662 W |
| % of rated | 99.0% | 97.5% | 95.6% | 93.8% | 91.9% | 90.0% |
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 datasheet range and the Australian approval coincide exactly: all eight models TWMHF-66HD700 to 735 are listed, so no intersection narrowing is needed. Scored model: TWMHF-66HD735 · checked 2026-08-18. Evidence.
Sources & references · checked 2026-09-22
Strong evidence coverage
19 of 19 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.
Record correction. Built 2026-08-18 from Tongwei's Australian-market datasheet, footer AUS-Ver.20241126, which carries a North Sydney address (Level 25, 100 Mount Street, 2060). The file is image-only: its text layer yields ~2 KB and no electrical table, so every figure here was read from a 170 dpi render, not parsed. The datasheet names the cell type only as "THC"; Tongwei's own newsroom expands THC as heterojunction, and the CEC list flags the family bifacial. TNC is Tongwei's separate TOPCon brand and must not be conflated. Prior research reported this family as absent from Tongwei's catalogue; that is wrong - the THC sheet sits behind the download page's category filter (typeid=47) and an unfiltered read of the page misses it. Re-verification 2026-08-18: salt mist recorded as certified without published severity from the Clean Energy Council enhanced listing for exact model TWMHF-66HD735, under panel rubric v2.11.0 which added that band. Australian warranty-terms recovery 2026-08-29: structured AU overlay terms recovered or held from the exact governing instrument. First-market US and DE overlay review 2026-09-01: official regional catalogues recorded; Australian overlays and scores unchanged. Australian warranty/service source recovered 5 October 2026: official AU A4 policy body dated 30 April 2026 with Appendix A5 catalogue label 27 August names exact TWMHF-66HD700–735. Six regional claim/service explanations integrated without changing global score, 735 W benchmark, approval dates or whole-product freshness. Upload/catalogue labels do not establish a contractual effective date.
- Sourced valuesData card →
- Archived copy of the primary sourcePDF ↗
Show 3 more
- Cell technology tierManufacturer ↗
- Independent energy yieldIndependent test ↗
- PID (IEC TS 62804)Manufacturer ↗
Product record history
4 changes to this record · 1 product changed in this update
AU Warranty scope
- Current text
- Current official Australian limited warranty, body dated 30 April 2026 and listed as A4 with Appendix A5 dated 27 August in the AU catalogue, names TWMHF-66HDxxx and Appendix A includes 700–735 W. It states 15-year product and 30-year front-side STC power cover: 1% first year, then 0.375% annually, ending at 88.12%. Applies to Grade A modules sold or delivered by Tongwei to Australia, subject to the governing contract and conditions; current publication does not establish retroactive replacement of an earlier buyer contract. Starts at delivery to the direct purchaser or six months after factory-out, whichever is earlier. Australian Consumer Law guarantees are expressly preserved.
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 recordSource revision
- Current text
- Built 2026-08-18 from Tongwei's Australian-market datasheet, footer AUS-Ver.20241126, which carries a North Sydney address (Level 25, 100 Mount Street, 2060). The file is image-only: its text layer yields ~2 KB and no electrical table, so every figure here was read from a 170 dpi render, not parsed. The datasheet names the cell type only as "THC"; Tongwei's own newsroom expands THC as heterojunction, and the CEC list flags the family bifacial. TNC is Tongwei's separate TOPCon brand and must not be conflated. Prior research reported this family as absent from Tongwei's catalogue; that is wrong - the THC sheet sits behind the download page's category filter (typeid=47) and an unfiltered read of the page misses it. Re-verification 2026-08-18: salt mist recorded as certified without published severity from the Clean Energy Council enhanced listing for exact model TWMHF-66HD735, under panel rubric v2.11.0 which added that band. Australian warranty-terms recovery 2026-08-29: structured AU overlay terms recovered or held from the exact governing instrument. First-market US and DE overlay review 2026-09-01: official regional catalogues recorded; Australian overlays and scores unchanged. Australian warranty/service source recovered 5 October 2026: official AU A4 policy body dated 30 April 2026 with Appendix A5 catalogue label 27 August names exact TWMHF-66HD700–735. Six regional claim/service explanations integrated without changing global score, 735 W benchmark, approval dates or whole-product freshness. Upload/catalogue labels do not establish a contractual effective date.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheetAU Warranty conditions
- Before
- Not previously recorded
- After
- labour: Conditional direct repair or replacement cost cover applies when Tongwei selects that remedy; it does not promise every site labour charge. Dismantling, repacking, installation and reinstallation costs are assigned to the buyer.; registration: No separate registration deadline is stated in the reviewed policy. A written claim is required within 30 calendar days of discovering the breach, with purchase proof, serial/model identification, location and supporting evidence; authorised return or inspection may be required.; remedy: Tongwei chooses repair, replacement or additional modules, power or financial compensation, or a depreciated refund and return. Replacement does not restart the original term; remedies remain subject to Australian Consumer Law.; removal reinstallation: Not covered under the limited warranty: dismantling, repacking, installation and reinstallation expenses are borne by the buyer. Statutory Australian Consumer Law rights are separately preserved.; transferability: Conditional assignment to lawful successors or assignees: modules must remain intact at the initial site, payments must be complete, all rights and obligations must transfer, and the assignee must accept the terms. Ownership evidence may be required within 15 working days of notice.; transport: Conditional freight cover for additional products under free repair, replacement or power compensation. Insurance, air freight, customs, tariffs and specified extra costs remain with the buyer. Returns require prior written consent; otherwise buyer bears costs and risks.
AU Evidence sources
- Before
- https://cleanenergycouncil.org.au/industry/products/modules; https://en.tongwei.cn/download.html?typeid=40; https://en.tongwei.cn/download.html?typeid=46; https://en.tongwei.cn/download.html?typeid=47; https://en.tongwei.cn/news/573.html; https://en.tongwei.cn/uploads/20260706/f273fcf99f988fcaa766232859a6beba.pdf
- After
- https://au.tongwei.cn/uploads/20260831/ad9f6f61d9dcf5f51c3cd495c0ac7b00.pdf; https://cleanenergycouncil.org.au/industry/products/modules; https://en.tongwei.cn/download.html?typeid=40; https://en.tongwei.cn/download.html?typeid=46; https://en.tongwei.cn/download.html?typeid=47; https://en.tongwei.cn/news/573.html; https://en.tongwei.cn/uploads/20260706/f273fcf99f988fcaa766232859a6beba.pdf
4 changes to this record · 49 products changed in this update
DE Support Note
- Before
- en.tongwei.cn/de/ returns 404. The global EN download library is not a German catalogue. TWMNH 48HD is not transferred onto this THC record.
- After
- en.tongwei.cn/de/ returns 404. The global EN download library is not a German catalogue. TWMNH 48HD is not transferred onto this THC record. Re-audited 2026-09-22: this determination rests solely on the fetch failure recorded above, with no independently reachable regional catalogue, store or archived copy consulted. Downgraded to not_reviewed - unavailable was not confirmed, and this pass did not re-fetch to confirm available either.
US Support Note
- Current text
- en.tongwei.cn/us/ returns 404. The global EN download library uses range notation TWMHF-66HD-700~735W. That is not a United States catalogue naming TWMHF-66HD735. TWMNH 48HD is a different family and is not transferred. Re-audited 2026-09-22: this determination rests solely on the fetch failure recorded above, with no independently reachable regional catalogue, store or archived copy consulted. Downgraded to not_reviewed - unavailable was not confirmed, and this pass did not re-fetch to confirm available either.
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 evidenceUS market evidence
9 changes to this record · 152 products changed in this update
US Support Note
- Before
- Not previously recorded
- After
- en.tongwei.cn/us/ returns 404. The global EN download library uses range notation TWMHF-66HD-700~735W. That is not a United States catalogue naming TWMHF-66HD735. TWMNH 48HD is a different family and is not transferred.
DE Evidence sources
- Before
- Not previously recorded
- After
- https://en.tongwei.cn/de/; https://en.tongwei.cn/download.html?typeid=47
US Evidence sources
- Before
- Not previously recorded
- After
- https://en.tongwei.cn/download.html?typeid=47; https://en.tongwei.cn/us/
Source revision
- Current text
- Built 2026-08-18 from Tongwei's Australian-market datasheet, footer AUS-Ver.20241126, which carries a North Sydney address (Level 25, 100 Mount Street, 2060). The file is image-only: its text layer yields ~2 KB and no electrical table, so every figure here was read from a 170 dpi render, not parsed. The datasheet names the cell type only as "THC"; Tongwei's own newsroom expands THC as heterojunction, and the CEC list flags the family bifacial. TNC is Tongwei's separate TOPCon brand and must not be conflated. Prior research reported this family as absent from Tongwei's catalogue; that is wrong - the THC sheet sits behind the download page's category filter (typeid=47) and an unfiltered read of the page misses it. Re-verification 2026-08-18: salt mist recorded as certified without published severity from the Clean Energy Council enhanced listing for exact model TWMHF-66HD735, under panel rubric v2.11.0 which added that band. Australian warranty-terms recovery 2026-08-29: structured AU overlay terms recovered or held from the exact governing instrument. 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 datasheetDE Support Note
- Before
- Not previously recorded
- After
- en.tongwei.cn/de/ returns 404. The global EN download library is not a German catalogue. TWMNH 48HD is not transferred onto this THC record.
2 changes to this record · 109 products changed in this update
3 changes to this record · 18 products changed in this update
Source revision
- Current text
- Built 2026-08-18 from Tongwei's Australian-market datasheet, footer AUS-Ver.20241126, which carries a North Sydney address (Level 25, 100 Mount Street, 2060). The file is image-only: its text layer yields ~2 KB and no electrical table, so every figure here was read from a 170 dpi render, not parsed. The datasheet names the cell type only as "THC"; Tongwei's own newsroom expands THC as heterojunction, and the CEC list flags the family bifacial. TNC is Tongwei's separate TOPCon brand and must not be conflated. Prior research reported this family as absent from Tongwei's catalogue; that is wrong - the THC sheet sits behind the download page's category filter (typeid=47) and an unfiltered read of the page misses it. Re-verification 2026-08-18: salt mist recorded as certified without published severity from the Clean Energy Council enhanced listing for exact model TWMHF-66HD735, under panel rubric v2.11.0 which added that band. Australian warranty-terms recovery 2026-08-29: structured AU overlay terms recovered or held from the exact governing instrument.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheetAU Warranty scope
- Current text
- The datasheet states a 15-year materials warranty and a 30-year linear power output warranty, first year 1.00% then 0.375% per year, reaching 88.12%. Rechecked 29 August 2026: Tongwei official download typeid=40 (Warranty) and typeid=46 (Australia zone) did not return an instrument naming TWMHF-66HD. Datasheet duration alone is not structured terms. Structured terms remain held.
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+4 in JSON recordAU Evidence sources
- Before
- https://cleanenergycouncil.org.au/industry/products/modules; https://en.tongwei.cn/download.html?typeid=47; https://en.tongwei.cn/news/573.html; https://en.tongwei.cn/uploads/20260706/f273fcf99f988fcaa766232859a6beba.pdf
- After
- https://cleanenergycouncil.org.au/industry/products/modules; https://en.tongwei.cn/download.html?typeid=40; https://en.tongwei.cn/download.html?typeid=46; https://en.tongwei.cn/download.html?typeid=47; https://en.tongwei.cn/news/573.html; https://en.tongwei.cn/uploads/20260706/f273fcf99f988fcaa766232859a6beba.pdf
2 changes to this record · 147 products changed in this update
Certification model
- Before
- Not previously recorded
- After
- TWMHF-66HD735 (IEC 61215-2021)
Certification: TWMHF-66HD735 (IEC 61215-2021)
- Before
- Not previously recorded
- After
- accepted at: 2026-08-29; category: module; certification model: TWMHF-66HD735 (IEC 61215-2021); jurisdiction: au_cec; match method: exact_normalized_single_record; product slug: tongwei-thc-twmhf-66hd-700-735-au; source key: data/tongwei_thc_twmhf_66hd_au.json; source manufacturer name: Tongwei Co Ltd; validation: approved at: 2024-12-13; candidate model: TWMHF-66HD735 (IEC 61215-2021); data confidence: High; evidence url: https://cer.gov.au/document/cec-approved-pv-modules-0; expires at: 2027-12-13; list data version: au-cer-module-2026-08-20-4e04f9838af2; list retrieved at: 2026-08-27T04:30:12Z; listing status at validation: listed
5 changes to this record · 118 products changed in this update
Independent energy yield: Evidence sources
- Before
- Not previously recorded
- After
- https://scorecard.pvel.com/methodology/; https://scorecard.pvel.com/wp-content/uploads/2024-PV-Module-Reliability-Scorecard.pdf
Independent energy yield: Evidence status
- Before
- Not previously recorded
- After
- sourced
Independent energy yield
- Before
- Not previously recorded
- After
- Brand or series yield-tested; exact model not covered
6 changes to this record · 19 products changed in this update
Salt mist (IEC 61701)
- Before
- Not previously recorded
- After
- Certified (IEC 61701), severity not published
Source revision
- Current text
- Built 2026-08-18 from Tongwei's Australian-market datasheet, footer AUS-Ver.20241126, which carries a North Sydney address (Level 25, 100 Mount Street, 2060). The file is image-only: its text layer yields ~2 KB and no electrical table, so every figure here was read from a 170 dpi render, not parsed. The datasheet names the cell type only as "THC"; Tongwei's own newsroom expands THC as heterojunction, and the CEC list flags the family bifacial. TNC is Tongwei's separate TOPCon brand and must not be conflated. Prior research reported this family as absent from Tongwei's catalogue; that is wrong - the THC sheet sits behind the download page's category filter (typeid=47) and an unfiltered read of the page misses it. Re-verification 2026-08-18: salt mist recorded as certified without published severity from the Clean Energy Council enhanced listing for exact model TWMHF-66HD735, under panel rubric v2.11.0 which added that band.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheetSalt mist (IEC 61701): Evidence sources
- Before
- Not previously recorded
- After
- https://cleanenergycouncil.org.au/industry/products/modules
3 changes to this record · 106 products changed in this update
1 change to this record · 3 products changed in this update
Product record
kind: panel; brand: Tongwei; name: THC TWMHF-66HD; model: TWMHF-66HD700 through TWMHF-66HD735 (132 (6x22) cells, N-type THC heterojunction, bifacial double glass); scored model TWMHF-66HD735; score: 65.1
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
- US market evidence checked
- DE market evidence checked
- AU market evidence checked
- Australian certification source identity verified
- 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
THC TWMHF-66HD scores 65, placing 50 of 53 in the Premium Performance class against a class average of 67.6. Its strongest scoring dimension is architecture & design (77). Guarantee & Backbone scores 41, the lowest pillar for this product. The class average on guarantee & backbone is 54. Underlying specifications include a module efficiency of 23.66%, N-type heterojunction (Tongwei THC) cell technology, 15-year product warranty backed by a 30-year performance term.
Dietreich Farquharson · review.solar