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Trina Solar TSM-NEG21C.20 720
Trina Solar Brand review

TSM-NEG21C.20 720

720 Wp TOPCon Bifacial 80%
ComparePV verdict

Efficiency leader, no clear weak spot

Rank 524 of 14,129
Compare panels Datasheet PDF
Power (Wp)
720
Typical for its class
Efficiency (%)
23.20
Strong · top 25%
Density (Wp/m²)
231.8
Typical · median 230.2
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 modules are based on N-type cells in i-TOPCon technology, designed to maximize gains throughout the entire lifecycle of the installation. In practice, this means better performance at high temperatures and significantly more stable energy production over the long term - especially where predictability and low operational costs are key.

A major highlight is the dual-glass construction, which enhances resistance to moisture, temperature fluctuations, and micro-cracks. Combined with high bifaciality (in two-sided variants), the Vertex N series enables a truly significant gain when modules operate above a light-colored background or on elevated structures.

Vertex N is an excellent choice for utility-scale PV farms and commercial installations, where lower BOS costs, easier logistics, and compatibility with trackers are crucial. It stands out from the competition thanks to its refined platform for large-size cells and a focus on long-term reliability, rather than short-term paper gains.

Ranking

420 panels in the segment TOPCon 700-750 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.20% 23.00% Strong · top 25% 1,349
Power density 231.8 230.2 Typical 1,390
Temperature coefficient -0.290 -0.290 Typical 2,220
Weight per kWp 53.2 52.9 Typical 7,089
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

Utility-scale, commercial and hot-climate.

Strengths
23.20% module efficiency

Top 25% of the TOPCon 700-750 W segment, against a median of 23.00%.

Notes from the database
  • At 23.2% efficiency, this panel is on par with typical TOPCon 700-750W modules
  • At 231.8 W/m² power density, roof space requirements are typical for TOPCon 700-750W panels
  • 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 10% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 720 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.20 % Strong Segment median 23.00%
Vmpp · Impp 41.30 V · 17.44 A Operating point at max power
Voc · Isc 49.40 V · 18.49 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 629 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
-
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.20 720 720 W 23.20% -0.290 38.3 kg You are here
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg -40 W, lighter, +2.0 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg -45 W, lighter, +1.8 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg Cooler, lighter, +1.8 pp
WST-675BKX72-A2 675 W 25.00% -0.260 32.1 kg -45 W, lighter, +1.8 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg Cooler, lighter, +1.7 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg -50 W, lighter, +1.6 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg -50 W, lighter, +1.6 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg -50 W, lighter, +1.6 pp
TSM-DEG21C.20-645 645 W 20.80% -0.340 38.3 kg -75 W, hotter, -2.4 pp
TSM-DEG21C.20-650 650 W 20.90% -0.340 38.3 kg -70 W, hotter, -2.3 pp
TSM-DE21-655W 655 W 21.10% -0.340 32.3 kg -65 W, lighter, -2.1 pp
TSM-DE21-660W 660 W 21.20% -0.340 32.3 kg -60 W, lighter, -2.0 pp
TSM-DE21-665W 665 W 21.40% -0.340 32.3 kg -55 W, lighter, -1.8 pp
TSM-DE21-670W 670 W 21.50% -0.340 32.3 kg Hotter, lighter, -1.7 pp
TSM-DE21-675W 675 W 21.70% -0.340 32.3 kg Hotter, lighter, -1.5 pp
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +85 W, cooler, +1.9 pp

Found 1393 panels of the same or similar size to this one, within ±10 mm. See them here Found 1403 panels of the same or similar size to this one, within ±25 mm. See them here Found 1403 panels of the same or similar size to this one, within ±50 mm. See them here Found 1435 panels of the same or similar size to this one, within ±100 mm. See them here

About the Vertex N series

6 answered

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

What is the warranty on Trina Solar Vertex N panels?
Trina Solar Vertex N panels come with a 12-year product warranty and a 30-year linear power warranty. First-year power degradation is capped at 1%, followed by a maximum annual decline of 0.4% in subsequent years. This means the module still delivers a substantial share of its rated power after 30 years, giving PV farm and commercial installation investors a predictable return and lower long-term risk.
How does i-TOPCon technology in the Vertex N differ from classic PERC panels?
N-type cells built with i-TOPCon technology, used in the Vertex N series, have lower recombination losses and perform better at high temperatures than classic P-type PERC cells. In practice this means higher efficiency (up to 740 Wp), slower power degradation over time, and more stable energy output throughout the system's lifetime, especially in hot climates or high-irradiance sites.
Are Vertex N panels bifacial?
This particular model in the Vertex N series is a mono-facial variant - it generates power only from the front side of the module. Trina Solar also offers bifacial versions within the same series, which can deliver a higher yield when mounted over a reflective surface or on elevated racking. The choice between mono-facial and bifacial depends on the installation type - sloped roofs rarely capture the full bifacial gain, so the mono-facial variant is often the more cost-effective choice there.
What installations are Trina Solar Vertex N panels rated up to 740 Wp best suited for?
Vertex N panels rated up to 740 Wp are designed mainly for utility-scale PV farms and large commercial installations, where lowering BoS (Balance of System) cost per watt installed matters most. Larger dimensions and higher unit power mean fewer modules, mounts, and cables per kW, simplifying logistics, tracker-mounted installation, and reducing overall install time compared to smaller panels.
Is Trina Solar a reliable Tier 1 manufacturer, and is the Vertex N series a good investment?
Yes, Trina Solar is one of the world's largest PV module manufacturers, classified as Tier 1 - meaning financial stability, continuous production, and a proven ability to honor long-term warranties. The company is headquartered in China and has extensive experience in utility-scale solar. Combined with the Vertex N series' 30-year power warranty, this gives investors a high degree of confidence in the system's durability and profitability.
How does the dual-glass construction in the Vertex N improve durability in harsh climates?
The dual-glass construction, where cells are protected by glass on both sides instead of a rear backsheet, significantly improves resistance to moisture, microcracks, and PID degradation. As a result, Vertex N panels better withstand large temperature swings, high humidity, and coastal or industrial environments. This design translates into a longer module lifespan and lower failure risk over the 30-year period covered by the power warranty.
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