Skip to main content
Trina Solar TSM-NEG18R.25-485
Trina Solar Brand review

TSM-NEG18R.25-485

485 Wp TOPCon
ComparePV verdict

Middle of its segment, modest efficiency

Rank 7,974 of 14,005
Compare panels Datasheet PDF
Power (Wp)
485
Strong · top 20%
Efficiency (%)
21.80
Weak · bottom 12%
Density (Wp/m²)
218.1
Weak · bottom 13%
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+ Series (TSM-NEG18R.25 485-515W) are modules designed for rooftop installations, where high power density and reliable performance over years are key. The use of N-type i-TOPCon cells helps reduce typical performance losses over time and stabilizes energy yields, translating to a better energy production balance throughout the installation's entire life cycle. The dual-glass (bifacial) construction increases resistance to environmental factors and micro-cracks, while simultaneously offering additional gains from reflected light where the roof and surroundings permit. For contractors, the compact C&I roof design is important - easier logistics, more efficient mounting, and compatibility with popular mounting systems and inverters. The series also stands out with its approach to installation costs: lower BOS costs and faster payback, achieved through high power per module and the possibility of string configuration optimization. This is an excellent choice for companies, warehouses, commercial facilities, and premium residential installations.

Ranking

1,089 panels in the segment TOPCon 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.80% 22.52% Weak · bottom 12% 7,022
Power density 218.1 225.2 Weak · bottom 13% 6,998
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 48.5 52.2 Typical 2,282
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
21.80% module efficiency

Bottom 12% of the TOPCon 450-500 W segment, against a median of 22.52%.

218.1 watts per square metre

Bottom 13% of the TOPCon 450-500 W segment, against a median of 225.2.

Notes from the database
  • Module efficiency of 21.8% is 0.7pp below average for TOPCon 450-500W panels (median: 22.5%)
  • Power density of 218.1 W/m² is 7.1 W/m² below TOPCon 450-500W median (225.2 W/m²) - needs more roof space
  • At -0.29%/°C, hot weather performance is typical for TOPCon 450-500W panels
  • Ranked #7022 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 485 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.80 % Weak Segment median 22.52%
Vmpp · Impp 32.70 V · 14.84 A Operating point at max power
Voc · Isc 39.40 V · 15.76 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 424 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 485 Wp appear here. The rest cover the whole series.

Performance Warranty Performance Warranty Whole series

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.25-485 485 W 21.80% -0.290 23.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +25 W, cooler, +3.2 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +3.0 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +20 W, cooler, +2.9 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +2.7 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +15 W, cooler, +2.7 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg Cooler, lighter, +2.7 pp
TSM-NEG18R.28-475 475 W 21.40% -0.290 23.5 kg -10 W, -0.4 pp
TSM-NEG18R.28-480 480 W 21.60% -0.290 23.5 kg Very close match
TSM-NEG18RC.27-490 490 W 22.00% -0.290 23.5 kg Very close match
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +75 W, cooler, +3.0 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +70 W, cooler, +2.8 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +65 W, lighter, +2.6 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +55 W, cooler, +2.6 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +55 W, cooler, +2.6 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +60 W, heavier, +2.5 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +60 W, cooler, +2.4 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
Are Trina Solar Vertex S+ TSM-NEG18R.25 panels bifacial?
No, this specific version of the Vertex S+ TSM-NEG18R.25 series is a monofacial module built with a dual-glass construction, not a bifacial panel. The dual-glass design primarily improves mechanical strength, resistance to microcracks, and long-term parameter stability, rather than generating additional yield from rear-side reflected light. If you need a true bifacial module, check other variants in Trina Solar's lineup designed specifically for bifacial installations.
What warranty comes with the Vertex S+ TSM-NEG18R.25 series?
The manufacturer offers a 15-year product warranty and a 30-year linear power output warranty. In practice, this means the panel should retain at least 87.4% of its rated power after 30 years, with no more than a 1% degradation in the first year. This is a standard offering from Tier 1 manufacturers using N-type TOPCon cells, giving investors predictable energy yield throughout the system's lifetime.
What is N-type i-TOPCon technology and why does Trina Solar use it in Vertex S+?
N-type i-TOPCon is an advanced cell technology that reduces light-induced degradation losses compared to older P-type cells like PERC. This allows the module to maintain higher efficiency over time and perform better under high temperatures. In the Vertex S+ TSM-NEG18R.25 series, this technology enables up to 515 W of power and 23.2% efficiency with 108 cells, translating into higher energy yield per square meter of roof space.
Are Vertex S+ 515W panels suitable for C&I roofs like warehouses and commercial buildings?
Yes, the module's dimensions of 1961×1134×30 mm and weight of 23.5 kg were designed for a compact form factor compatible with popular mounting systems and inverters used on commercial and industrial roofs. The high wattage per panel allows more kilowatts to be installed on a limited roof area, which matters for warehouse and service-building installations where every square meter of available space counts.
What are the dimensions and weight of the Trina Vertex S+ TSM-NEG18R.25 panel?
The module measures 1961×1134×30 mm and weighs 23.5 kg, with a 1.6 mm glass thickness in its dual-glass construction. These dimensions are similar to standard C&I panels, which simplifies on-site logistics, roof transport, and installation using typical racking systems without needing specialized non-standard mounting hardware.
Does a high wattage module up to 515 W actually lower solar installation costs?
Yes, higher-wattage panels mean fewer modules, less racking, wiring, and installation labor are needed to reach the same system capacity, directly reducing BOS (Balance of System) costs. Vertex S+ panels up to 515 W also allow better string-length optimization for specific inverters, cutting design and installation time and speeding up return on investment, especially for commercial and industrial-scale projects.
Add to compare