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Trina Solar Brand review

TSM-NEG21C.20 725W

725 Wp TOPCon Bifacial 80%
ComparePV verdict

Space saver, no clear weak spot

Rank 424 of 14,005
Compare panels Datasheet PDF
Power (Wp)
725
Strong · top 17%
Efficiency (%)
23.30
Strong · top 19%
Density (Wp/m²)
233.4
Strong · top 18%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
38.3
Typical · median 38.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

Trina Solar Vertex N panels based on advanced N-type i-TOPCon technology are the foundation of modern installations, eliminating typical limitations of older P-type cells. The use of an innovative cell structure allows for achieving significantly higher efficiency and minimizing light-induced degradation, which translates into stable energy yield for decades. This series stands out with an excellent temperature coefficient, making it an ideal solution for Polish climatic conditions, where modules maintain high efficiency even on hot days. Thanks to its design based on the 210 mm platform, Vertex N offers maximum power density on limited roof space, solving the problem of space shortages in ambitious prosumer projects. This solution is dedicated to both demanding private investors and large-scale photovoltaic farms looking to optimize LCOE costs. Compared to market competition, increased module bifaciality and better performance in diffused light guarantee a faster return on investment. By choosing this series, you opt for exceptional durability and reliability confirmed by a long-term warranty, which sets these components apart from standard solutions available on the market.

Ranking

420 panels in the segment TOPCon 700-750 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.30% 23.00% Strong · top 19% 1,017
Power density 233.4 230.2 Strong · top 18% 936
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 52.8 52.9 Typical 6,514
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, utility-scale and hot-climate.

Strengths
233.4 watts per square metre

Top 18% of the TOPCon 700-750 W segment, against a median of 230.2.

23.30% module efficiency

Top 19% of the TOPCon 700-750 W segment, against a median of 23.00%.

Notes from the database
  • At 23.3% efficiency, this panel is on par with typical TOPCon 700-750W modules
  • At 233.4 W/m² power density, this panel generates 3.2 W/m² more per unit area than TOPCon 700-750W median (230.2 W/m²)
  • Temperature coefficient of -0.29%/°C matches the TOPCon 700-750W median
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
  • In the top 7% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 725 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.30 % Strong Segment median 23.00%
Vmpp · Impp 41.50 V · 17.47 A Operating point at max power
Voc · Isc 49.60 V · 18.54 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×33 mm · 3.11 m² of roof
Weight 38.3 kg Typical Typical · median 38.0 kg
Cells 132 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
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 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 634 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 725 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
-
With bifacial gain
-

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
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Trina Solar TSM-NEG21C.20 725W 725 W 23.30% -0.290 38.3 kg You are here
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg -45 W, lighter, +1.9 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg -50 W, lighter, +1.7 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg Cooler, lighter, +1.7 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg -30 W, lighter, +1.6 pp
AIKO-A690-MAE78Dw 690 W 24.70% -0.260 34.5 kg -35 W, lighter, +1.4 pp
AIKO-A685-MAE78Dw 685 W 24.50% -0.260 34.5 kg -40 W, lighter, +1.2 pp
TSM-NEG21C.20Q-760 760 W 24.50% -0.260 38.3 kg +35 W, cooler, +1.2 pp
AIKO-A680-MAH78Dw 680 W 24.30% -0.260 34.7 kg -45 W, lighter, +1.0 pp
TSM-DEG21C.20-645 645 W 20.80% -0.340 38.3 kg -80 W, hotter, -2.5 pp
TSM-DEG21C.20-650 650 W 20.90% -0.340 38.3 kg -75 W, hotter, -2.4 pp
TSM-DE21-655W 655 W 21.10% -0.340 32.3 kg -70 W, lighter, -2.2 pp
TSM-DE21-660W 660 W 21.20% -0.340 32.3 kg -65 W, lighter, -2.1 pp
TSM-DE21-665W 665 W 21.40% -0.340 32.3 kg -60 W, lighter, -1.9 pp
TSM-DE21-670W 670 W 21.50% -0.340 32.3 kg -55 W, lighter, -1.8 pp
TSM-DE21-675W 675 W 21.70% -0.340 32.3 kg Hotter, lighter, -1.6 pp
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +80 W, cooler, +1.8 pp

Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does i-TOPCon technology in Trina Vertex N panels differ from standard P-type panels?
i-TOPCon is an N-type cell technology featuring an additional passivation layer on the rear side of the cell, which reduces electron recombination and boosts module efficiency up to 23.3%. Unlike older P-type cells, Vertex N panels have lower annual degradation (around 0.4% after the first year) and better resistance to LID, light-induced degradation, allowing the module to retain higher power output for longer.
What is the maximum power output of the Trina Vertex N panel, and how many modules are needed for a typical 10 kWp system?
Panels in the Vertex N series reach a maximum power output of up to 725 Wp. At this power rating, a 10 kWp system requires roughly 14 panels, significantly fewer than classic 400-450 W modules. This reduces the number of panels needed and simplifies installation on smaller roof areas.
Does the bifacial design of Vertex N panels actually increase energy production?
Yes, the dual glass construction with an exposed rear cell surface generates an additional 10% to 20% energy from reflected light, depending on ground albedo (e.g., light gravel, white roofing membrane, or winter snow). The effect is especially noticeable on ground-mount systems or trapezoidal roofs with light-colored coverings, where the module has unobstructed access to light from both sides.
What warranty comes with Trina Solar Vertex N panels, and what does it cover?
The manufacturer provides a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty guaranteeing at least 87.4% of nominal power retained after that period. As a Tier 1 manufacturer with a long track record, Trina Solar offers reliable warranty enforceability, which matters given such a long coverage period.
Do Vertex N panels perform well on hot roofs during summer?
Yes, the series features a favorable power temperature coefficient, meaning less output loss as module temperature rises on hot days. This is a real advantage in Polish climate conditions, where roof surface temperatures in summer can significantly exceed ambient air temperature, reducing the yield of less optimized panels.
Are Trina Vertex N panels suitable for large solar farms, or only residential installations?
The Vertex N series works well for both applications. High power density on the 210 mm platform and a low-voltage design allow more modules to be connected per string, lowering LCOE, which is especially cost-effective for utility-scale solar farms. At the same time, its compact per-panel power output makes it attractive for residential systems with limited roof space.
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