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Trina Solar TSM-NEG9R.28-450
Trina Solar Brand review

TSM-NEG9R.28-450

450 Wp TOPCon
ComparePV verdict

Light for its output, no clear weak spot

Rank 8,400 of 14,129
Compare panels Datasheet PDF
Power (Wp)
450
Weak · bottom 9%
Efficiency (%)
22.50
Typical · median 22.52%
Density (Wp/m²)
225.2
Typical · median 225.2
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
21.0
Strong · 3.0 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

The Trina Solar Vertex S+ (TSM-NEG9R.28) series was designed for rooftops where high energy production, hassle-free installation, and long-term operational stability are equally important. Its key feature is the combination of n-type i-TOPCon cells with the glass-glass (double glass) construction - this pairing genuinely improves module resistance to aging and environmental factors, while simultaneously helping maintain higher yields over a long-term horizon.

In practice, this means lower risks of performance degradation over time and better production predictability, which is crucial for reporting and planning self-consumption. The adopted architecture also enhances safety - enhanced mechanical and fire resistance is particularly valuable for residential and commercial rooftops.

The Vertex S+ NEG9R.28 is an excellent choice for home installations, small businesses, and rooftop projects where high workmanship quality, compatibility with popular inverters, and long warranties are required, without compromising on aesthetics and durability.

Ranking

1,096 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.50% 22.52% Typical 4,281
Power density 225.2 225.2 Typical 4,284
Temperature coefficient -0.290 -0.290 Typical 2,220
Weight per kWp 46.7 52.2 Strong · top 18% 1,258
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 0 caution
Best for

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

Strengths
46.7 kg per kWp

Top 18% of the TOPCon 450-500 W segment, against a median of 52.2.

Notes from the database
  • At 22.5% efficiency, this panel is on par with typical TOPCon 450-500W modules
  • At 225.2 W/m² power density, roof space requirements are typical for TOPCon 450-500W panels
  • At -0.29%/°C, hot weather performance is typical for TOPCon 450-500W panels
  • 21.0 kg weight - 3.0 kg lighter than TOPCon 450-500W median (24.0 kg), reducing installation effort
  • #4281 for efficiency, #2220 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 450 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.50 % Typical Segment median 22.52%
Vmpp · Impp 44.60 V · 10.09 A Operating point at max power
Voc · Isc 52.90 V · 10.74 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 Strong Strong · 3.0 kg below median
Cells 144 · 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 393 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Trina Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 450 Wp appear here. The rest cover the whole series.

I-V Curves of PV Module (450W) I-V Curves of PV Module (450W) 450 W

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-NEG9R.28-450 450 W 22.50% -0.290 21.0 kg You are here
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +45 W, cooler, +2.3 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +40 W, cooler, +2.0 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +50 W, cooler, +2.0 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +50 W, cooler, +2.0 pp
GK-3-54HGb-500M 500 W 24.50% -0.260 21.4 kg +50 W, cooler, +2.0 pp
GCL-NR10R/54BGDF 500 W 24.50% -0.260 24.6 kg +50 W, heavier, +2.0 pp
TSM-DE09R.05-405 405 W 20.30% -0.340 21.8 kg Hotter, -2.2 pp, -5 yr warranty
TSM-DE09R.05-410 410 W 20.50% -0.340 21.8 kg Hotter, -2.0 pp, -5 yr warranty
TSM-DE09R-415 415 W 20.80% -0.340 21.8 kg Hotter, -1.7 pp, -5 yr warranty
TSM-DE09R.08-420 420 W 21.00% -0.340 21.8 kg Hotter, -1.5 pp, -5 yr warranty
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +60 W, cooler, +2.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +55 W, cooler, +2.2 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg +55 W, heavier, +2.2 pp

Found 1402 panels of the same or similar size to this one, within ±10 mm. See them here Found 1432 panels of the same or similar size to this one, within ±25 mm. See them here Found 3651 panels of the same or similar size to this one, within ±50 mm. See them here Found 3999 panels of the same or similar size to this one, within ±100 mm. See them here

About the Vertex S+ (TSM-NEG9R.28) series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What is n-type TOPCon technology in the Trina Vertex S+ TSM-NEG9R.28 panels, and how does it differ from classic p-type cells?
TOPCon (Tunnel Oxide Passivated Contact) is an n-type cell technology that reduces charge carrier recombination through an additional passivation layer. In practice, this means higher efficiency (up to 460 Wp per module), lower annual degradation, and better performance at high temperatures compared to older p-type PERC cells. It's the technology most market leaders, including Trina Solar, are now investing in.
What warranty covers the Trina Solar Vertex S+ TSM-NEG9R.28 panels?
The Vertex S+ TSM-NEG9R.28 series comes with a 15-year product warranty covering material and manufacturing defects, plus a 30-year power warranty guaranteeing sustained high energy output over the long term. This is a key factor when choosing panels for an installation expected to run reliably for decades.
Does the glass-glass construction of the Vertex S+ NEG9R.28 require special mounting on a sloped roof?
No, the modules, measuring 1762×1134×30 mm and weighing about 21 kg, install on standard rail-based mounting systems used for glass-glass modules, similar to conventional framed panels. The double glass increases stiffness and mechanical resistance to snow and wind loads, an added benefit in harsher roof conditions, but it doesn't change the standard installation procedure.
Are the Trina Vertex S+ TSM-NEG9R.28 panels bifacial?
No, the Vertex S+ TSM-NEG9R.28 series consists of mono-facial modules, despite the glass-glass construction. The double glass here mainly serves a protective role, improving sealing, mechanical strength, and fire resistance, rather than generating extra energy from the rear side as bifacial panels do.
How do the Vertex S+ NEG9R.28 panels perform in low and high temperatures?
The power temperature coefficient is -0.29%/°C, meaning less efficiency loss as temperature rises compared to typical p-type panels (usually around -0.35%/°C). This translates to better performance in summer heat. Low temperatures aren't an issue either - silicon cells, including TOPCon, operate normally and can even perform slightly better in colder climates.
How many cells does the Trina Solar Vertex S+ TSM-NEG9R.28 panel have, and how does that affect shading tolerance?
The module uses 144 half-cut cells, which, compared to full-size cells, reduce power losses under partial shading from chimneys, antennas, or nearby buildings. Smaller cell segments also lower resistive losses and boost overall module efficiency, reaching up to 460 Wp.
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