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Trina Solar TSM-NEG9RC.27-425
Trina Solar Brand review

TSM-NEG9RC.27-425

425 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, modest efficiency

Rank 10,224 of 14,005
Compare panels Datasheet PDF
Power (Wp)
425
Typical for its class
Efficiency (%)
21.30
Weak · bottom 13%
Density (Wp/m²)
212.7
Weak · bottom 13%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
21.0
Typical · median 22.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Trina Solar Vertex S+ Series (TSM-NEG9RC.27 425-450W) are modules designed for roofs, where efficiency, durability, and aesthetics are all important. The key advantage is n-type i-TOPCon cells - they operate more reliably over time and lose efficiency more slowly, genuinely improving the long-term profitability of installations. The applied dual-glass (glass-glass) construction better protects against moisture, loads, and typical operational risks, while also facilitating high reliability in demanding conditions (e.g., high humidity, airborne salinity).

The Clear Black variant features a black, transparent aesthetic - the panel is less visually dominant on the roof, which is significant for modern buildings and premium investments. This solution is for residential and commercial rooftop installations where you need a compromise between power and a compact format, as well as wide compatibility with popular inverters and optimizers. An additional argument is the extended warranty, which enhances the security of the investment and distinguishes the series from many standard rooftop modules.

Ranking

1,218 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.30% 22.00% Weak · bottom 13% 8,519
Power density 212.7 220.2 Weak · bottom 13% 8,733
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 49.4 51.4 Typical 2,909
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 2 caution
Best for

Residential, commercial, shaded-installations and hot-climate.

Not ideal for

Tight roof space and roofs where every square metre has to count.

Watch-outs
21.30% module efficiency

Bottom 13% of the TOPCon 400-450 W segment, against a median of 22.00%.

212.7 watts per square metre

Bottom 13% of the TOPCon 400-450 W segment, against a median of 220.2.

Notes from the database
  • Efficiency of 21.3% is 0.7pp below the TOPCon 400-450W median (22.0%)
  • 212.7 W/m² power density is 7.5 W/m² below TOPCon 400-450W median (220.2 W/m²) - requires larger installation area
  • At -0.29%/°C, hot weather performance is typical for TOPCon 400-450W panels
  • At 21.0 kg, weight matches the TOPCon 400-450W median
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 425 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.30 % Weak Segment median 22.00%
Vmpp · Impp 42.90 V · 9.92 A Operating point at max power
Voc · Isc 50.90 V · 10.56 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1762×1134×30 mm · 2.00 m² of roof
Weight 21.0 kg Typical Typical · median 22.0 kg
Cells 144 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.240 · 0.040 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 371 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.290 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Trina Solar TSM-NEG9RC.27-425 425 W 21.30% -0.290 21.0 kg You are here
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +50 W, +2.7 pp, +10 yr warranty
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +40 W, hotter, +2.5 pp
JAT54S40-475/LR 475 W 23.80% -0.260 19.3 kg +50 W, cooler, +2.5 pp
TWMNH-48HW475 475 W 23.80% -0.280 23.7 kg +50 W, heavier, +2.5 pp
CHSM48RN(DG)/F-BH-475 475 W 23.80% -0.290 24.5 kg +50 W, heavier, +2.5 pp
AIKO-A475-MCE54Mw 475 W 23.80% -0.260 21.0 kg +50 W, cooler, +2.5 pp
AIKO-A475-MAH54Mw 475 W 23.80% -0.260 21.5 kg +50 W, cooler, +2.5 pp
TSM-DE09R.05-405 405 W 20.30% -0.340 21.8 kg Hotter, -1.0 pp, -5 yr warranty
TSM-DE09R.05-410 410 W 20.50% -0.340 21.8 kg Hotter, -0.8 pp, -5 yr warranty
TSM-DE09R-415 415 W 20.80% -0.340 21.8 kg Hotter, -0.5 pp, -5 yr warranty
TSM-DE09R.08-420 420 W 21.00% -0.340 21.8 kg Hotter, -0.3 pp, -5 yr warranty
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +85 W, cooler, +3.7 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +70 W, cooler, +3.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +80 W, cooler, +3.4 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +65 W, cooler, +3.2 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +75 W, cooler, +3.2 pp

Found 1395 panels of the same or similar size to this one, within ±10 mm. See them here Found 1425 panels of the same or similar size to this one, within ±25 mm. See them here Found 3614 panels of the same or similar size to this one, within ±50 mm. See them here Found 3962 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty comes with the Trina Vertex S+ TSM-NEG9RC.27 panels?
The manufacturer provides a 15-year product warranty and a 30-year linear power warranty, guaranteeing at least 87.4% of original output after 30 years of operation. This is longer than many standard rooftop modules offer, which meaningfully strengthens the investment's security and lowers the levelized cost of energy over the system's lifetime.
What is n-type i-TOPCon technology and does it actually improve panel performance?
i-TOPCon uses n-type cells with an additional passivation layer that reduces current losses and slows module degradation over time. In practice this delivers higher efficiency (up to 22.5%) and a slower year-over-year power decline compared to conventional p-type PERC cells, resulting in higher energy yield over a 20-30 year lifespan.
What does bifacial mean for the Vertex S+, and how much extra energy does it really produce?
The module generates power from both the front and rear side of the cells, capturing light reflected off the roof, terrace, or a light-colored facade. With a bifaciality factor of around 80%, mounting on a bright surface or ground-mount structure can add several to over ten percent extra annual yield compared to a monofacial panel of the same rated power.
Is the dual-glass construction more durable than a standard glass-and-backsheet panel?
Yes, using glass instead of a standard polymer backsheet better protects the cells against moisture, microcracks, and PID degradation, which matters especially in coastal or high-humidity regions. This construction also offers stronger mechanical resistance to hail and snow loads, supporting long-term reliability and justifying the extended product warranty.
Is the Trina Vertex S+ Clear Black 450W suitable for a single-family sloped roof?
Yes, the compact 1762x1134 mm footprint and roughly 21 kg weight make it easy to transport and install on typical rafters of a sloped roof. The Clear Black transparent-look aesthetic makes the panel less visually dominant on the roof surface, a common requirement for modern single-family homes and premium projects where facade appearance matters.
Are the Vertex S+ 425-450W panels compatible with common inverters and power optimizers?
Yes, the module's voltage and current characteristics align with the standard operating ranges of most string inverters and power optimizers on the market, including hybrid solutions paired with battery storage. This lets installers freely mix components from different manufacturers without compatibility issues, simplifying design for both residential and commercial installations.
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