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Specialist & Local

Prime QD

420–440 W · Mono-glass

SilfabReleased 2022

65/ 100

Very good

Global

15+ Yrs Field-Proven

The verdict. In our Specialist & Local class, Silfab Prime QD leads on performance & degradation.

3rdof 6 in Specialist & LocalTop halfclass average 64.9
Compare this panel →Ask Watt →

The assessment

How it scores, by category

Architecture & Design54
Efficiency & Yield59
Durability (verified)66
Performance & Degradation78
Guarantee & Backbone72
Sustainability64

Market position

3rdof 6 in Specialist & LocalTop half
536573

Our reading

Prime QD scores 65, placing 3 of 6 in the Specialist & Local class against a class average of 64.9. Its strongest scoring dimension is performance & degradation (78), running 10.1 points above the class average on this dimension. Architecture & Design scores 54, the lowest pillar for this product. The class average on architecture & design is 69. Underlying specifications include a module efficiency of 22.6%, N-type silicon cell technology, 25-year product warranty backed by a 30-year performance term.

Dietreich Farquharson · review.solar

The data

Power
440W
Efficiency
22.6%
Cell
N-type silicon
Temp coeff
-0.29%/°C
Technology architecture

Solar module

Architecture guide

Produces DC electricity at the roof. It contains no system-level power conversion or storage.

Product role
None in the module.
Published range
420–440 W
Electrical layer
DC module output
Construction
Mono-glass
Architecture describes the product boundary. It is not a system design or an equipment-pairing decision.

Performance guarantee: 30-year linear output

440 Wrated393W at yr 30
859095100Guaranteed floor 89.3%Product 25yr89.3%0yr5yr10yr15yr20yr25yr30yr
Projected outputGuaranteed floor: 89.3% at yr 30Product warranty ends yr 25

Wattage figure based on the sourced rated power (440 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

386W358W

Year 1 to year 25, at 30°C and 1000 W/m². Rated 440 W at STC.

How this is modelled

Compounds this panel’s own published first-year (2%) and annual (0.3%/yr) degradation figures against its 440 W rated (STC) output, then derates for the ambient and irradiance selected. Output is scaled roughly linearly with irradiance (1000 W/m² against the 1000 W/m² STC reference). This is the dominant real-world effect at low light, whether from cloud, shading or soiling. Output is then further derated for heat, from this panel’s own NOCT (45°C) and temperature coefficient (-0.29%/°C), giving an estimated cell temperature of 61°C at that ambient and irradiance. A datasheet-derived estimate, not a field measurement or a warranty guarantee: it does not account for this panel’s own low-light efficiency response (a separate, less-consistently-published spec), or for wind and system design. See NOCT and temperature coefficient in the glossary.

Control panel

30°C
1000 W/m²
Year1510152025
Watts386 W381 W375 W369 W363 W358 W
% of rated87.7%86.6%85.3%83.9%82.6%81.3%
Before you buy
Local positionUse a market view to check local availability, approvals and warranty scope.
Ask the installerWill the quote name the exact Prime QD model and wattage, and who covers labour if the module warranty is used?

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 is anchored to the highest published rating in this exact series. Scored model: SIL-440 QD NTC · checked 2026-08-23. Evidence.

Sources & references · checked 2026-09-01

Strong evidence coverage

22 of 22 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 revision. SIL-440 QD exact 2026 sheet and governing module warranty rechecked 2026-08-23; unsupported TOPCon and financial-strength claims removed. First-market DE overlay review 2026-09-01: official German catalogues recorded; existing Australian and United States overlays and scores unchanged.

Change ledger

Product record history

5 changes to this record · 152 products changed in this update
  1. Record updated

    Source revision

    Before
    SIL-440 QD exact 2026 sheet and governing module warranty rechecked 2026-08-23; unsupported TOPCon and financial-strength claims removed.
    After
    SIL-440 QD exact 2026 sheet and governing module warranty rechecked 2026-08-23; unsupported TOPCon and financial-strength claims removed. First-market DE overlay review 2026-09-01: official German catalogues recorded; existing Australian and United States overlays and scores unchanged.
    Primary datasheet
  2. Evidence added

    DE Support Note

    Before
    Not previously recorded
    After
    silfabsolar.com/de returns HTTP 403. No German catalogue naming SIL-440 QD NTC was retrieved. Held is not unavailable.
    DE market evidence
  3. Evidence added

    DE Certifications

    Before
    Not previously recorded
    After
    DE market evidence
  4. Evidence added

    DE Status

    Before
    Not previously recorded
    After
    not_reviewed
    DE market evidence
  5. Evidence added

    DE Evidence sources

    Before
    Not previously recorded
    After
    https://silfabsolar.com/de/
    DE market evidence
1 change to this record · 118 products changed in this update
  1. Record updated

    Independent energy yield: Evidence sources

    Before
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://retc-ca.com/pvmi; https://silfabsolar.com/silfab-solar-receives-global-recognition-for-high-achievement-in-performance-from-retcs-pv-module-index-report-2025/
    Independent energy yieldIndependent energy yield+2 in JSON record
47 changes to this record · 7 products changed in this update
  1. Record updated

    Temp coefficient Pmax (%/C): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  2. Evidence removed

    Cell technology tier

    Before
    TOPCon tier
    After
    No longer recorded
    No direct source binding recorded
  3. Record updated

    Salt mist (IEC 61701): Evidence sources

    Before
    https://sunergysystems.com/wp-content/uploads/2025/02/Silfab-SIL-440-QD-Data-Generic-20241217-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction+1 in JSON record
  4. Record updated

    Guarantee & Backbone pillar score

    Before
    76.4
    After
    72.4
    Primary datasheet
  5. Evidence removed

    Cell technology tier: Evidence status

    Before
    sourced
    After
    No longer recorded
    No direct source binding recorded
  6. Record updated

    Source

    Before
    checked: 2026-07-15; source revision: Silfab SIL-440 QD US datasheet and product material reviewed 2026-07-15; source url: https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    checked: 2026-08-23; source revision: Silfab SIL-440 QD final May 2026 sheet rechecked 2026-08-23; source url: https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheet
  7. Evidence removed

    Financial strength & warranty backing

    Before
    Financially strong (profitable / strong parent)
    After
    No longer recorded
    No direct source binding recorded
  8. Record updated

    Encapsulation & frame construction: Evidence sources

    Before
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  9. Record updated

    Ammonia resistance (IEC 62716): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  10. Record updated

    Manufacturing track record: Evidence sources

    Before
    After
    https://silfabsolar.com/our-story/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetManufacturing track record
  11. Record updated

    Hail resistance: Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  12. Record updated

    NOCT (C): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  13. Record updated

    Salt mist (IEC 61701)

    Before
    Severity 1
    After
    Certified (IEC 61701), severity not published
    Primary datasheetSalt mist (IEC 61701)superseded+1 in JSON record
  14. Record updated

    Negative loading (MQT16, Pa): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  15. Evidence added

    Warranty transferability: Evidence status

    Before
    Not previously recorded
    After
    sourced
    Primary datasheetGuaranteed end-of-warranty output (%)
  16. Record updated

    Module efficiency (%): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  17. Record updated

    PID (IEC TS 62804): Evidence status

    Before
    sourced
    After
    reviewed_absence
    Primary datasheetEncapsulation & frame construction
  18. Record updated

    End-of-life & recycling disclosure: Evidence sources

    Before
    https://silfabsolar.com/the-growing-need-for-solar-panel-recycling-in-the-u-s/
    After
    https://silfabsolar.com/our-story/; https://silfabsolar.com/resources-downloads/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEnd-of-life & recycling disclosure+2 in JSON record
  19. Record updated

    Global score

    Before
    67.1
    After
    65.4
    Primary datasheet
  20. Record updated

    AU Evidence sources

    Before
    https://silfabsolar.com/; https://silfabsolar.com/our-solar-panels/silfab-prime/
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction+2 in JSON record
  21. Evidence added

    Power tolerance (%): Evidence sources

    Before
    Not previously recorded
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  22. Record updated

    Fire classification (IEC 61730): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  23. Record updated

    PID (IEC TS 62804): Evidence sources

    Before
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  24. Record updated

    Annual degradation (%/yr): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  25. Record updated

    First-year degradation (%): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  26. Record updated

    Performance guarantee period (yrs): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/wp-content/uploads/2024/03/CS0010N-Limited-Product-and-Linear-Performance-Warranty.pdf; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetGuaranteed end-of-warranty output (%)
  27. Evidence removed

    Cell technology tier: Evidence sources

    Before
    After
    No longer recorded
    No direct source binding recorded
  28. Record updated

    Efficiency & Yield pillar score

    Before
    57.9
    After
    58.8
    Primary datasheet
  29. Evidence added

    Guarantee assurance: Evidence sources

    Before
    Not previously recorded
    After
    https://silfabsolar.com/wp-content/uploads/2024/03/CS0010N-Limited-Product-and-Linear-Performance-Warranty.pdf; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetGuaranteed end-of-warranty output (%)
  30. Evidence added

    Power tolerance (%)

    Before
    Not previously recorded
    After
    2
    Primary datasheetEncapsulation & frame construction
  31. Record updated

    Architecture & Design pillar score

    Before
    66.3
    After
    54.4
    Primary datasheet
  32. Record updated

    US Evidence sources

    Before
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2024/02/Silfab-Solar-Limited-Product-and-Linear-Performance-Warranty-CS0010M-.pdf (archived copy https://web.archive.org/web/20240716035848/https://silfabsolar.com/wp-content/uploads/2024/02/Silfab-Solar-Limited-Product-and-Linear-Performance-Warranty-CS0010M-.pdf); https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf; https://www.platt.com/p/2208340/silfab-solar/solar-panel-prime-series-440-watts/silsil440qd
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2024/03/CS0010N-Limited-Product-and-Linear-Performance-Warranty.pdf; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetGuaranteed end-of-warranty output (%)+3 in JSON record
  33. Record updated

    Independent energy yield: Evidence sources

    Before
    https://silfabsolar.com/resources-downloads/
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction+1 in JSON record
  34. Evidence removed

    Financial strength & warranty backing: Evidence sources

    Before
    After
    No longer recorded
    No direct source binding recorded
  35. Evidence added

    Power tolerance (%): Evidence status

    Before
    Not previously recorded
    After
    sourced
    Primary datasheetEncapsulation & frame construction
  36. Record updated

    Ranges

    Current text
    checked: 2026-08-23; market: global; max: 440; min: 420; range label: 420–440 W; source revision: Silfab SIL-440 QD final May 2026 sheet rechecked 2026-08-23; source url: https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf; unit: W

    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
  37. Record updated

    Durability (verified) pillar score

    Before
    62
    After
    66
    Primary datasheet
  38. Record updated

    Positive loading (MQT16, Pa): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/our-solar-panels/silfab-prime/sil-440-qd/; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetEncapsulation & frame construction
  39. Evidence removed

    Financial strength & warranty backing: Evidence status

    Before
    sourced
    After
    No longer recorded
    No direct source binding recorded
  40. Evidence added

    Guarantee assurance: Evidence status

    Before
    Not previously recorded
    After
    sourced
    Primary datasheetGuaranteed end-of-warranty output (%)
  41. Record updated

    Source revision

    Before
    Silfab SIL-440 QD US datasheet and product material reviewed 2026-07-15 Re-verification 2026-08-20: Independent energy yield recorded as brand-or-series under panel rubric v2.14.0, which applied to this criterion the same exact-model rule v2.13.0 applied to Verified reliability.
    After
    SIL-440 QD exact 2026 sheet and governing module warranty rechecked 2026-08-23; unsupported TOPCon and financial-strength claims removed.
    Primary datasheet
  42. Evidence added

    Warranty transferability: Evidence sources

    Before
    Not previously recorded
    After
    https://silfabsolar.com/wp-content/uploads/2024/03/CS0010N-Limited-Product-and-Linear-Performance-Warranty.pdf; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetGuaranteed end-of-warranty output (%)
  43. Record updated

    US Warranty scope

    Before
    25-year product workmanship warranty (12-year base, extendable to 25 years subject to registration and conditions); 30-year linear power performance guarantee (≥90.8% at year 25).
    After
    North America; 12-year base product warranty, conditionally extended to 25 years through the qualified-installer registration program, plus a 30-year linear performance warranty ending at 89.3%.
    US market evidencesupersededPrimary datasheet+3 in JSON record
  44. Record updated

    Guarantee period (yrs): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/wp-content/uploads/2024/03/CS0010N-Limited-Product-and-Linear-Performance-Warranty.pdf; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetGuaranteed end-of-warranty output (%)
  45. Evidence added

    Warranty transferability

    Before
    Not previously recorded
    After
    Fully transferable (new owner, no registration required)
    Primary datasheetGuaranteed end-of-warranty output (%)
  46. Evidence added

    Guarantee assurance

    Before
    Not previously recorded
    After
    Parts only
    Primary datasheetGuaranteed end-of-warranty output (%)
  47. Record updated

    Guaranteed end-of-warranty output (%): Evidence sources

    Before
    https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    After
    https://silfabsolar.com/wp-content/uploads/2024/03/CS0010N-Limited-Product-and-Linear-Performance-Warranty.pdf; https://silfabsolar.com/wp-content/uploads/2026/05/Silfab-SIL-440-QD-Data-Final.pdf
    Primary datasheetGuaranteed end-of-warranty output (%)
4 changes to this record · 65 products changed in this update
  1. Record updated

    Global score

    Before
    68.5
    After
    67.1
    Primary datasheet
  2. Record updated

    Independent energy yield

    Before
    Field/PAN energy-yield validated
    After
    Brand or series yield-tested; exact model not covered
    End-of-life & recycling disclosure
  3. Record updated

    Efficiency & Yield pillar score

    Before
    65.2
    After
    57.9
    Primary datasheet
  4. Record updated

    Source revision

    Before
    Silfab SIL-440 QD US datasheet and product material reviewed 2026-07-15
    After
    Silfab SIL-440 QD US datasheet and product material reviewed 2026-07-15 Re-verification 2026-08-20: Independent energy yield recorded as brand-or-series under panel rubric v2.14.0, which applied to this criterion the same exact-model rule v2.13.0 applied to Verified reliability.
    Primary datasheet
3 changes to this record · 106 products changed in this update
  1. Record updated

    Architecture & Design pillar score

    Before
    64.5
    After
    66.3
    Primary datasheet
  2. Record updated

    Durability (verified) pillar score

    Before
    61.8
    After
    62
    Primary datasheet
  3. Record updated

    Global score

    Before
    68.1
    After
    68.5
    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.

  1. Core scorecard evidence checked
  2. DE market evidence checked
  3. US market evidence checked
  4. AU market evidence checked
  5. Series benchmark evidence checked
  6. Plain-language warranty summary checked

Evidence record (JSON)

Scored by Solar Analytica Research

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