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Trina Solar TSM-DE21-665W
Trina Solar Brand review

TSM-DE21-665W

665 Wp PERC
ComparePV verdict

Light for its output, short guarantee

Rank 3,753 of 14,005
Compare panels Datasheet PDF
Power (Wp)
665
Typical for its class
Efficiency (%)
21.40
Typical · median 21.25%
Density (Wp/m²)
214.1
Typical · median 212.5
Temp (%/°C)
-0.340
Typical · median -0.340
Weight (kg)
32.3
Strong · 2.2 kg below median
Warranty (yrs)
25
Weak · bottom 21%

Trina Solar Vertex TSM-DE21 650-675W series is designed to maximize returns in large-scale installations-where every meter of construction and every stage of installation matters. The modules feature 210 mm wafer-based monocrystalline PERC cells and an optimized cell-level architecture, contributing to high efficiency without complicating the design.

In practice, it distinguishes itself through the low-voltage working concept, simplifying the construction of efficient string layouts within common system configurations. This directly translates to BOS cost reduction-fewer components for both structure and cabling, along with more efficient logistics for large-scale projects.

The modules perform well under harsh conditions and high temperatures, effectively stabilizing energy production during transition seasons. This makes them an ideal choice for utility-scale and commercial/industrial projects, as well as any application where high power output per module and predictable system yield are top priorities.

Ranking

320 panels in the segment PERC 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.40% 21.25% Typical 8,323
Power density 214.1 212.5 Typical 8,250
Temperature coefficient -0.340 -0.340 Typical 8,778
Weight per kWp 48.6 52.3 Strong · top 5% 2,352
Performance warranty 25 yrs 30 yrs Weak · bottom 21% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 1 caution
Best for

Commercial and utility-scale.

Not ideal for

Owners who want a long output guarantee.

Strengths
48.6 kg per kWp

Top 5% of the PERC 650-700 W segment, against a median of 52.3. Ranked 2,352nd in the whole database.

Watch-outs
25 year performance warranty

Bottom 21% of the PERC 650-700 W segment, against a median of 30 yrs.

Notes from the database
  • At 21.4% efficiency, this panel is on par with typical PERC 650-700W modules
  • Power density of 214.1 W/m² matches the PERC 650-700W median
  • Temperature coefficient of -0.34%/°C matches the PERC 650-700W median
  • 32.3 kg weight - 2.2 kg lighter than PERC 650-700W median (34.5 kg), reducing installation effort
  • In the top 59% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 665 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.40 % Typical Segment median 21.25%
Vmpp · Impp 38.00 V · 17.51 A Operating point at max power
Voc · Isc 45.90 V · 18.57 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 32.3 kg Strong Strong · 2.2 kg below median
Cells 132 · PERC Monocrystalline
Coefficient Pmax -0.340 %/°C Typical median -0.340 of its segment
Coefficient Voc · Isc -0.250 · 0.040 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 21% · median 30 yrs
End-of-warranty output 84.8 % Equals 546 W guaranteed
Degradation 2.00 → 0.55 % 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
-0.340 %/°C against a segment median of -0.340
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Trina Solar TSM-DE21-665W 665 W 21.40% -0.340 32.3 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +3.8 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, +3.8 pp, +5 yr warranty
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, +3.6 pp, +5 yr warranty
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +3.6 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg Cooler, +3.6 pp, +5 yr warranty
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg Cooler, +3.5 pp, +5 yr warranty
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, +3.4 pp, +5 yr warranty
TSM-DEG21C.20-645 645 W 20.80% -0.340 38.3 kg Heavier, -0.6 pp, +5 yr warranty
TSM-DEG21C.20-650 650 W 20.90% -0.340 38.3 kg Heavier, -0.5 pp, +5 yr warranty
TSM-DE21-655W 655 W 21.10% -0.340 32.3 kg -10 W, -0.3 pp
TSM-DE21-660W 660 W 21.20% -0.340 32.3 kg Very close match
TSM-DE21-670W 670 W 21.50% -0.340 32.3 kg Very close match
TSM-DE21-675W 675 W 21.70% -0.340 32.3 kg +10 W, +0.3 pp
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +140 W, cooler, +3.7 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +135 W, cooler, +3.5 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +130 W, cooler, +3.4 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
Is the Trina Solar Vertex TSM-DE21 650-675W series still available for purchase?
No, the TSM-DE21 650-675W series has been discontinued from Trina Solar's active production lineup. The panel may still be found through remaining distributor stock or the secondary market, and the manufacturer's 25-year power warranty and 12-year product warranty remain valid for already-installed modules. Before buying, verify the production date and current service status with your distributor, since newer Trina series (e.g. Vertex N) have replaced this model in the current lineup.
What is the low-voltage design concept in the Vertex TSM-DE21 modules and what does it mean for an investor?
Thanks to a 210 mm wafer cell architecture and optimized cell count per module, the TSM-DE21 delivers high wattage at a comparatively low operating string voltage. This allows longer strings without exceeding inverter voltage limits, directly cutting cabling, mounting structure, and installation labor costs (BoS). For large-scale ground-mount and commercial projects, this translates into lower CAPEX per installed kWp.
Are Trina Vertex TSM-DE21 675W panels suitable for a residential pitched roof?
Technically yes, but it's rarely the practical choice. The module measures roughly 2384x1304 mm and weighs about 32 kg, making it large and heavy by typical rafter-mounted residential standards. This series was designed for solar farms, commercial, and industrial installations where maximizing power per square meter on flat roofs or ground mounts matters most, rather than for standard residential prosumer installations.
What warranty applies to Trina Solar Vertex TSM-DE21 650-675W modules?
The manufacturer provides a 12-year product warranty covering material and workmanship defects, along with a 25-year linear power output warranty. Trina Solar is a Tier 1 manufacturer headquartered in China, which in practice means financial stability and a realistic ability to honor warranty claims over the long operating lifespan of the installation.
How do TSM-DE21 modules perform in low irradiance and high temperature conditions?
The monocrystalline PERC cells used in this series show good spectral response under low irradiance, limiting production drops on cloudy days and during morning/evening hours. A refined interconnection architecture combined with a low power temperature coefficient helps stabilize energy yield in summer, when cell temperatures rise above Standard Test Conditions (STC), resulting in more predictable annual output.
How do the PERC cells in the TSM-DE21 differ from bifacial modules in other Trina series?
The TSM-DE21 uses monofacial PERC cells built on 210 mm wafers, optimized for maximum power from a single front surface without rear-side light capture. Unlike bifacial series, it doesn't require reflective ground surfaces or extra mounting clearance, making it well suited to standard, tightly-spaced rows in utility-scale PV farms where maximum unit power output is the priority rather than additional rear-side gain.
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