The assessment
How it scores, by category
Market position
The data
N-type TOPCon module
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
Performance guarantee: 30-year linear output
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
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 (1000W/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
| Year | 1 | 5 | 10 | 15 | 20 | 25 |
|---|---|---|---|---|---|---|
| Watts | 386 W | 381 W | 375 W | 369 W | 363 W | 358 W |
| % of rated | 87.7% | 86.6% | 85.3% | 83.9% | 82.6% | 81.3% |
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 2026-07-15. Evidence.
Sources & references · checked 2026-08-05
Strong evidence coverage
16 of 21 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. Silfab SIL-440 QD US datasheet and product material reviewed 2026-07-15
- Sourced valuesData card →
- Warranty summary25-year product warranty →
Show 1 more
- Archived copy of the primary sourcePDF ↗
Product record history
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
- Series benchmark evidence checked
- AU market evidence checked
- Plain-language warranty summary checked
Scored by Solar Analytica Research
Further reading from Findings
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New scorecards, score changes and market signals, published as they happen.
Our reading
Prime QD scores 68, placing 3 of 6 in the Specialist & Local class against a class average of 65.6. Its strongest scoring dimension is performance & degradation (78), running 10.1 points above the class average on this dimension. Underlying specifications include a module efficiency of 22.6%, N-type TOPCon cell technology, 25-year product warranty backed by a 30-year performance term.