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Trina Solar TSM-DE09R.08-420
Trina Solar Brand review

TSM-DE09R.08-420

420 Wp PERC
ComparePV verdict

Space saver, no clear weak spot

Rank 11,162 of 14,005
Compare panels Datasheet PDF
Power (Wp)
420
Typical for its class
Efficiency (%)
21.00
Strong · top 23%
Density (Wp/m²)
210.2
Strong · top 19%
Temp (%/°C)
-0.340
Strong · top 24%
Weight (kg)
21.8
Typical · median 22.0 kg
Warranty (yrs)
25
Typical · median 25 yrs

Trina Solar's Vertex S Backsheet Monocrystalline Module series was designed for maximum energy yield on rooftops, where every square meter counts and fast installation is key. Thanks to the Vertex platform based on a 210 mm waffle and solutions such as 1/3-cut and high-density interconnect, the modules achieve high efficiency in a compact format, facilitating adaptation to pitched roofs with tile and window sections, multiple shading zones. The application of multi-busbar technology supports stable operation and better current collection from the cells, while the electrical string architecture enables flexible string design.

In practice, this series addresses typical challenges in rooftop installations - it allows increasing the total system power without modifying the roof structure, reduces the time of the installation team's work, and minimizes the risk of equipment mismatch. The Backsheet is the choice for investors seeking a classic module structure that combines durability with a favorable cost-benefit ratio. It is an excellent option for residential installations and small commercial systems, where compatibility with popular inverters and roof constructions and aesthetics matter.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.00% 20.60% Strong · top 23% 9,758
Power density 210.2 206.2 Strong · top 19% 9,728
Temperature coefficient -0.340 -0.350 Strong · top 24% 8,778
Weight per kWp 51.9 53.0 Typical 5,315
Performance warranty 25 yrs 25 yrs Typical 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

3 positive · 0 caution
Best for

Residential, commercial and shaded-installations.

Strengths
210.2 watts per square metre

Top 19% of the PERC 400-450 W segment, against a median of 206.2.

21.00% module efficiency

Top 23% of the PERC 400-450 W segment, against a median of 20.60%.

-0.340 %/°C temperature coefficient

Top 24% of the PERC 400-450 W segment, against a median of -0.350.

Notes from the database
  • At 21.0% efficiency, this panel is on par with typical PERC 400-450W modules
  • At 210.2 W/m² power density, this panel generates 4.0 W/m² more per unit area than PERC 400-450W median (206.2 W/m²)
  • Temperature coefficient of -0.34%/°C matches the PERC 400-450W median
  • Ranked #9758 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 420 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.00 % Strong Segment median 20.60%
Vmpp · Impp 42.00 V · 10.01 A Operating point at max power
Voc · Isc 50.10 V · 10.58 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1762×1134×30 mm · 2.00 m² of roof
Weight 21.8 kg Typical Typical · median 22.0 kg
Cells 144 · PERC Monocrystalline
Coefficient Pmax -0.340 %/°C Strong top 24% of its segment
Coefficient Voc · Isc -0.250 · 0.040 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 84.8 % Equals 345 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 -0.350
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Trina Solar TSM-DE09R.08-420 420 W 21.00% -0.340 21.8 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +45 W, +2.8 pp, +5 yr warranty
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg Cooler, +2.8 pp, +5 yr warranty
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg Cooler, +2.7 pp, +15 yr warranty
AIKO-A470-MAH54Mb 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +2.6 pp
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg Cooler, +2.6 pp, +5 yr warranty
HSM-BD54-LA470 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +2.6 pp
TSM-DE09R.05-405 405 W 20.30% -0.340 21.8 kg -15 W, -0.7 pp
TSM-DE09R.05-410 410 W 20.50% -0.340 21.8 kg -10 W, -0.5 pp
TSM-DE09R-415 415 W 20.80% -0.340 21.8 kg Very close match
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +90 W, cooler, +4.0 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +75 W, cooler, +3.8 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +85 W, cooler, +3.7 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +70 W, cooler, +3.5 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +80 W, cooler, +3.5 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +80 W, cooler, +3.5 pp

Found 1395 panels of the same or similar size to this one, within ±10 mm. See them here Found 1425 panels of the same or similar size to this one, within ±25 mm. See them here Found 3614 panels of the same or similar size to this one, within ±50 mm. See them here Found 3962 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 Backsheet 435 Wp panels suitable for a pitched roof with roof windows?
Yes, this is one of the series' main use cases. Thanks to a compact format based on 210 mm wafers and 1/3-cut cell architecture, the modules are easier to fit around roof windows, dormers, and chimneys without losing overall system power. The smaller dimensions also simplify transport and installation on a typical single-family home roof structure.
What is the warranty on Trina Solar Vertex S Backsheet modules and what does it cover?
The manufacturer offers a 15-year product warranty covering material and workmanship defects, plus a 25-year power output warranty. As a Tier 1 manufacturer with a long track record, Trina Solar provides real service assurance, which matters when planning the return on investment over a quarter-century timeframe.
How does PERC technology in this series differ from bifacial modules?
Vertex S Backsheet modules use monofacial PERC cells, generating energy only from the front side. Unlike bifacial panels, they don't require a bright, light-reflecting surface or special mounting setup, which simplifies installation on pitched roofs and lowers overall system cost while maintaining high efficiency.
How many Trina Vertex S 435 Wp panels are needed for a 5 kW residential rooftop system?
At 435 Wp per unit, a roughly 5 kW system needs approximately 11-12 modules, giving a total capacity of around 4.8-5.2 kWp. The exact number depends on available roof area, tilt angle, and shading, so it's worth confirming the layout with an installer.
Does the multi-busbar technology in Trina Vertex S panels translate into a real energy gain?
Yes, the multi-busbar metallization grid collects current more effectively from the cell surface and reduces resistive losses and microcrack risk, resulting in more stable performance under partial shading and lower power degradation over time compared to older busbar designs.
Are Trina Solar Vertex S Backsheet panels compatible with common hybrid inverters?
Yes, a 435 Wp module with standard voltage and current parameters works easily with most string and hybrid inverters on the market, including systems paired with battery storage. The classic backsheet construction also makes it easier to source standard mounting hardware for pitched-roof installations.
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