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
- 715–740 W
- Electrical layer
- DC module output
- Construction
- Bifacial, Dual-glass
Performance guarantee: 30-year linear output
Wattage figure based on the sourced rated power (740 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 740 W at STC.
How this is modelled
Compounds this panel’s own published first-year (1%) and annual (0.4%/yr) degradation figures against its 740 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 (43°C) and temperature coefficient (-0.29%/°C), giving an estimated cell temperature of 59°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 | 661 W | 650 W | 637 W | 624 W | 610 W | 597 W |
| % of rated | 89.3% | 87.9% | 86.1% | 84.3% | 82.5% | 80.6% |
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 is anchored to the highest published Australian rating in this exact series. Scored model: TSM-740NEG21C.20 · checked 2026-08-06. Evidence.
Sources & references · checked 2026-08-06
Strong evidence coverage
24 of 30 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. Trina DT-M-0042 AUS EN J, version TSM_AUS_EN_2025_C, global warranty PS-M-0135-Y and Vertex manual reviewed 2026-08-06
- Sourced valuesData card →
- Warranty summary12-year product warranty →
Show 3 more
- Verified reliabilityIndependent test ↗
- Independent energy yieldIndependent test ↗
- Financial strength & warranty backingWarranty ↗
Evidence timeline
Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.
- Core scorecard evidence checked
- AU market evidence checked
- Series benchmark evidence checked
- Plain-language warranty summary checked
Scored by Solar Analytica Research
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Our reading
Vertex N NEG21C.20 scores 75, placing 13 of 55 in the Global Tier-1 class and within 2.2 points of the class leader. Its strongest scoring dimension is sustainability (91), running 26.8 points above the class average on this dimension. Underlying specifications include a module efficiency of 23.8%, N-type TOPCon cell technology, 12-year product warranty backed by a 30-year performance term.