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Trina Solar TSM-NEG18R.28-475
Trina Solar Brand review

TSM-NEG18R.28-475

475 Wp TOPCon
ComparePV verdict

Middle of its segment, needs the roof space

Rank 8,869 of 14,005
Compare panels Datasheet PDF
Power (Wp)
475
Typical for its class
Efficiency (%)
21.40
Weak · bottom 5%
Density (Wp/m²)
213.6
Weak · bottom 4%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
23.5
Typical · median 24.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

Trina Solar's Vertex S+ (Monofacial Dual Glass) series is designed for roofs where performance matters, but long-term, trouble-free operation is just as important. Its key advantage is the dual-glass construction - instead of a standard backsheet, both sides feature glass, reducing the risk of micro-cracks, improving resistance to moisture and aggressive factors, and enhancing fire safety for installations. In practice, this means fewer warranty claims and more reliable performance in challenging conditions, such as high-humidity areas or near industrial zones.

At the heart of the series are n-type i-TOPCon cells, prized for their high efficiency and slower degradation compared to many p-type constructions - enabling sustained high performance over a long lifespan. Additionally, the Vertex S+ format is optimized for compatibility with inverters and optimizers and offers convenient installation on residential and C&I roofs.

This is an excellent choice for investors seeking long-term power stability, aesthetics, and real material durability, not just impressive catalog parameters.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.40% 22.52% Weak · bottom 5% 8,323
Power density 213.6 225.2 Weak · bottom 4% 8,410
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 49.5 52.2 Typical 3,006
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 and shaded-installations.

Not ideal for

Roofs where every square metre has to count and tight roof space.

Watch-outs
213.6 watts per square metre

Bottom 4% of the TOPCon 450-500 W segment, against a median of 225.2. Ranked 8,410th in the whole database.

21.40% module efficiency

Bottom 5% of the TOPCon 450-500 W segment, against a median of 22.52%. Ranked 8,323rd in the whole database.

Notes from the database
  • At 21.4% efficiency, this panel is 1.1pp below the TOPCon 450-500W median of 22.5%
  • Power density of 213.6 W/m² is 11.6 W/m² below TOPCon 450-500W median (225.2 W/m²) - needs more roof space
  • Temperature coefficient of -0.29%/°C matches the TOPCon 450-500W median
  • #8323 for efficiency, #2165 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 475 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.40 % Weak Segment median 22.52%
Vmpp · Impp 32.30 V · 14.72 A Operating point at max power
Voc · Isc 39.00 V · 15.68 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1961×1134×30 mm · 2.22 m² of roof
Weight 23.5 kg Typical Typical · median 24.0 kg
Cells 108 · TOPCon Monocrystalline
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 415 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
-

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
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Trina Solar TSM-NEG18R.28-475 475 W 21.40% -0.290 23.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +35 W, cooler, +3.6 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +3.4 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +30 W, cooler, +3.3 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +3.1 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +25 W, cooler, +3.1 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +25 W, cooler, +3.1 pp
TSM-NEG18R.28-480 480 W 21.60% -0.290 23.5 kg +0.2 pp
TSM-NEG18R.25-485 485 W 21.80% -0.290 23.5 kg +10 W, +0.4 pp
TSM-NEG18RC.27-490 490 W 22.00% -0.290 23.5 kg +15 W, +0.6 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +85 W, cooler, +3.4 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +80 W, cooler, +3.2 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +75 W, lighter, +3.0 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +65 W, cooler, +3.0 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +65 W, cooler, +3.0 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +70 W, heavier, +2.9 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +70 W, cooler, +2.8 pp

Found 471 panels of the same or similar size to this one, within ±10 mm. See them here Found 508 panels of the same or similar size to this one, within ±25 mm. See them here Found 662 panels of the same or similar size to this one, within ±50 mm. See them here Found 1471 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What makes the dual glass construction of the Trina Vertex S+ different from panels with a standard backsheet?
In the dual glass version, the rear backsheet is replaced with tempered glass, matching the front side. This gives symmetrical protection against moisture ingress, microcracks, and mechanical stress during transport or installation. In practice this means fewer warranty claims, a higher fire safety rating, and more stable long-term module performance, especially in harsher climate conditions.
What is n-type i-TOPCon cell technology in the Vertex S+ and does it actually improve energy yield?
i-TOPCon is an n-type cell technology with an added passivation layer that reduces carrier recombination and increases conversion efficiency compared to older p-type PERC cells. The key advantage is a slower annual degradation rate, so the module loses less power year over year. For an investor this translates into higher real energy yield over a 20-30 year horizon, not just better datasheet numbers.
What warranty comes with the Trina Solar Vertex S+ Monofacial Dual Glass series?
The manufacturer provides a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. Trina Solar is a Tier 1 manufacturer headquartered in China, giving it the financial and service backing needed to honor long-term warranty claims, which matters given the extended investment horizon of a PV system.
Are the Vertex S+ 480 Wp panels suitable for coastal or industrial locations with high humidity?
Yes, the dual glass construction is designed specifically for such environments. Glass on both sides of the module withstands salt mist, high humidity, ammonia vapor, and industrial dust far better than a conventional backsheet, which can crack or lose its seal over time. This significantly lowers the risk of internal corrosion and premature power loss in these locations.
Is the Trina Vertex S+ Monofacial Dual Glass panel bifacial?
No, this version is monofacial, generating power only from the front surface. Trina Solar also offers a bifacial variant of the same series, but the monofacial version performs better on typical pitched roofs, where the rear side sits close to the roof surface and there is no practical rear-side light gain to capture.
Are the 480 Wp Vertex S+ panels compatible with standard inverters and power optimizers?
Yes, the Vertex S+ format and electrical parameters are optimized for popular string inverter configurations used in residential and C&I installations. The module works with standard string inverters and power optimizers from most leading manufacturers, making it easy to design a system without needing niche or proprietary equipment.
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