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Trina Solar TSM-NEG18R.28-515
Trina Solar Brand review

TSM-NEG18R.28-515

515 Wp TOPCon
ComparePV verdict

Light for its output, no clear weak spot

Rank 5,086 of 14,005
Compare panels Datasheet PDF
Power (Wp)
515
Typical for its class
Efficiency (%)
23.20
Strong · top 16%
Density (Wp/m²)
231.6
Strong · top 18%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
23.5
Strong · 3.5 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

Trina Solar Vertex S+ TSM-NEG18R.28 490-520W is designed as a robust yet practical module for commercial and industrial rooftops, where fast installation, safety, and stable energy production over years are key. The use of i-TOPCon n-type cells means a higher yield in real operating conditions and less sensitivity to typical operational losses, translating to more predictable savings. The dual-glass construction increases resistance to environmental factors and micro-cracking risks, thereby reducing downtime and warranty claims in demanding locations. This series stands out for its installation economics - the low-voltage architecture and high string power allow for more efficient system design and reduced BOS costs, especially on large rooftops with long cable runs. For investors and EPC companies, a significant advantage is also the long-term performance warranty, supporting the project’s financial certainty. This is an excellent choice for halls, warehouses, commercial buildings, and the modernization of existing installations, where competition often requires compromises between power, durability, and ease of implementation.

Ranking

432 panels in the segment TOPCon 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.20% 22.73% Strong · top 16% 1,306
Power density 231.6 227.4 Strong · top 18% 1,473
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 45.6 52.4 Strong · top 9% 789
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

3 positive · 0 caution
Best for

Commercial, shaded-installations and hot-climate.

Strengths
45.6 kg per kWp

Top 9% of the TOPCon 500-550 W segment, against a median of 52.4. Ranked 789th in the whole database.

23.20% module efficiency

Top 16% of the TOPCon 500-550 W segment, against a median of 22.73%.

231.6 watts per square metre

Top 18% of the TOPCon 500-550 W segment, against a median of 227.4.

Notes from the database
  • Efficiency of 23.2% matches the TOPCon 500-550W median
  • Power density of 231.6 W/m² packs 4.2 W/m² more into the same footprint vs TOPCon 500-550W median (227.4 W/m²)
  • At -0.29%/°C, hot weather performance is typical for TOPCon 500-550W panels
  • 23.5 kg weight - 3.5 kg lighter than TOPCon 500-550W median (27.0 kg), reducing installation effort
  • Ranked #1306 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 515 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.20 % Strong Segment median 22.73%
Vmpp · Impp 33.90 V · 15.20 A Operating point at max power
Voc · Isc 40.90 V · 15.96 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 Strong Strong · 3.5 kg below median
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 450 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 515 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.28-515 515 W 23.20% -0.290 23.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +1.8 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +1.6 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +45 W, cooler, +1.6 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg -10 W, cooler, +1.5 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +40 W, cooler, +1.4 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg -25 W, cooler, +1.3 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg -15 W, cooler, +1.3 pp
TSM-NEG18R.28-475 475 W 21.40% -0.290 23.5 kg -40 W, -1.8 pp
TSM-NEG18R.28-480 480 W 21.60% -0.290 23.5 kg -35 W, -1.6 pp
TSM-NEG18R.25-485 485 W 21.80% -0.290 23.5 kg -30 W, -1.4 pp
TSM-NEG18RC.27-490 490 W 22.00% -0.290 23.5 kg -25 W, -1.2 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +35 W, lighter, +1.2 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +25 W, cooler, +1.2 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +25 W, cooler, +1.2 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +30 W, heavier, +1.1 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +30 W, cooler, +1.0 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 warranty comes with the Trina Solar Vertex S+ TSM-NEG18R.28 panels?
The series comes with a 15-year product warranty and a 30-year power warranty, guaranteeing at least 87.4% output after that period. This is one of the longer warranties available for modules in this class, which matters especially when planning ROI for commercial installations, where energy production stability is calculated over several decades.
What is n-type TOPCon technology in the Vertex S+ panels, and is it better than PERC?
TOPCon (Tunnel Oxide Passivated Contact) is an n-type cell technology that reduces recombination losses and light-induced degradation (LID), allowing the panel to reach higher efficiency (up to 23.4%) and better withstand high temperatures than older p-type PERC cells. In practice, this means higher real-world annual energy yield and slower power decline over the years of operation.
Are the Vertex S+ TSM-NEG18R.28 panels bifacial modules?
No, this specific series uses a dual-glass construction but operates as a monofacial module - the rear glass serves a protective function, increasing mechanical durability, rather than generating additional energy from reflected light. If a bifacial module is needed, a bifacial variant from the Vertex family is available in other power ratings.
What does the low-voltage architecture in the Vertex S+ mean, and how does it affect installation costs?
The low-voltage architecture combined with high string power allows longer panel strings to be designed while staying within inverter voltage limits. This reduces the number of cable runs and combiner boxes needed, directly lowering BOS (Balance of System) costs - an important factor for large commercial and industrial roofs with long cable routes.
Does the dual-glass construction of the Vertex S+ hold up on industrial roofs in harsh weather conditions?
Yes, the dual-glass build increases the module's resistance to microcracks, moisture, and mechanical loads such as strong wind or snow load, reducing the risk of failures and warranty claims over the panel's lifetime. This makes it particularly well-suited to large roof areas on warehouses and industrial halls, where harder service access raises the cost of any repairs.
What kind of installations is the Trina Solar Vertex S+ TSM-NEG18R.28 series best suited for?
The series is designed for commercial and industrial roofs - manufacturing halls, warehouses, logistics centers, and retail buildings - as well as retrofits of existing installations. High power output up to 520 Wp, low-voltage architecture, and durable dual-glass construction enable fast installation over large areas while reducing the number of modules needed to reach the target system power.
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