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Trina Solar TSM-NEG9R.28-445
Trina Solar Brand review

TSM-NEG9R.28-445

445 Wp TOPCon
ComparePV verdict

Light for its output, no clear weak spot

Rank 8,799 of 14,129
Compare panels Datasheet PDF
Power (Wp)
445
Strong · top 8%
Efficiency (%)
22.30
Strong · top 17%
Density (Wp/m²)
222.7
Typical · median 220.2
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
21.0
Strong · 1.0 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

1,220 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.30% 22.00% Strong · top 17% 5,161
Power density 222.7 220.2 Typical 5,365
Temperature coefficient -0.290 -0.290 Typical 2,220
Weight per kWp 47.2 51.5 Strong · top 12% 1,537
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 0 caution
Best for

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

Strengths
47.2 kg per kWp

Top 12% of the TOPCon 400-450 W segment, against a median of 51.5.

22.30% module efficiency

Top 17% of the TOPCon 400-450 W segment, against a median of 22.00%.

Notes from the database
  • Efficiency of 22.3% matches the TOPCon 400-450W median
  • At 222.7 W/m² power density, roof space requirements are typical for TOPCon 400-450W panels
  • Temperature coefficient of -0.29%/°C matches the TOPCon 400-450W median
  • At 21.0 kg, weight matches the TOPCon 400-450W median
  • In the top 37% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 445 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.30 % Strong Segment median 22.00%
Vmpp · Impp 44.30 V · 10.05 A Operating point at max power
Voc · Isc 52.60 V · 10.71 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 · 1.0 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 389 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-NEG9R.28-445 445 W 22.30% -0.290 21.0 kg You are here
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +50 W, cooler, +2.5 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +45 W, cooler, +2.2 pp
STP-NT11/48QGSF-490 490 W 24.50% -0.260 21.5 kg +45 W, cooler, +2.2 pp
JAT54S40-485/LR 485 W 24.30% -0.260 19.3 kg +40 W, cooler, +2.0 pp
AIKO-A485-MCE54Mw 485 W 24.30% -0.260 21.0 kg +40 W, cooler, +2.0 pp
LR7-54HJD-495M 495 W 24.30% -0.240 23.5 kg +50 W, cooler, +2.0 pp
AIKO-A485-MAH54Mw 485 W 24.30% -0.260 21.5 kg +40 W, cooler, +2.0 pp
TSM-DE09R.05-405 405 W 20.30% -0.340 21.8 kg Hotter, -2.0 pp, -5 yr warranty
TSM-DE09R.05-410 410 W 20.50% -0.340 21.8 kg Hotter, -1.8 pp, -5 yr warranty
TSM-DE09R-415 415 W 20.80% -0.340 21.8 kg Hotter, -1.5 pp, -5 yr warranty
TSM-DE09R.08-420 420 W 21.00% -0.340 21.8 kg Hotter, -1.3 pp, -5 yr warranty
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +65 W, cooler, +2.7 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +60 W, cooler, +2.4 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg +60 W, heavier, +2.4 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +55 W, cooler, +2.2 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +55 W, cooler, +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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