Trina Solar TSM-DE09R.08-420 vs Trina Solar TSM-DE09R-420
VS
The verdict
DE09R.08-420 leads on the differences that matter
The largest is product warranty: 3 yrs longer. 18 of 19 comparable parameters are identical.
See the one differenceHow alike are they
18
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
1 of 19 parameters
What actually differs
Parameter
DE09R.08-420
DE09R-420
Difference
Product warranty
15 yrs
12 yrs
3 yrs longer
02
What it means on a roof
Thirty years of production
Each panel's own declared degradation curve, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
DE09R.08-420
13,612 kWh
DE09R-420
13,612 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
DE09R.08-420
DE09R-420
Standard test conditions
25 °C
100.0% of rated power
420 W
420 W
Cool, bright day
40 °C
94.9% of rated power
399 W
399 W
Typical summer roof
55 °C
89.8% of rated power
377 W
377 W
Hot roof
70 °C
84.7% of rated power
356 W
356 W
03
Full specification
Parameter
DE09R.08-420
DE09R-420
Difference
Power and efficiency
Rated power
420 Wp
420 Wp
Same
Module efficiency
21.00 %
21.00 %
Same
Power density
210.2 Wp/m²
210.2 Wp/m²
Same
Open-circuit voltage
50.10 V
50.10 V
Same
Voltage at max power
42.00 V
42.00 V
Same
Short-circuit current
10.58 A
10.58 A
Same
Current at max power
10.01 A
10.01 A
Same
Temperature
Temperature coefficient
-0.340 %/°C
-0.340 %/°C
Same
Mechanical
Dimensions
1762x1134x30 mm
1762x1134x30 mm
Same
Module area
1.998 m²
1.998 m²
Same
Weight
21.8 kg
21.8 kg
Same
Weight per kWp
51.9 kg/kWp
51.9 kg/kWp
Same
Warranty and degradation
Product warranty
15 yrs
12 yrs
+3 yrs for DE09R.08-420
Performance warranty
25 yrs
25 yrs
Same
Annual degradation
0.55 %/yr
0.55 %/yr
Same
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
144
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#9,758
vs
#9,758
Tied - the same position in the database
Power density
#9,728
vs
#9,728
Tied - the same position in the database
Heat behaviour
#8,778
vs
#8,778
Tied - the same position in the database
Weight
#5,315
vs
#5,315
Tied - the same position in the database
Warranty
#9,798
vs
#9,798
Tied - the same position in the database
Overall
#11,162
vs
#11,507
DE09R.08-420 leads by 345 places
05
Open the full database
More useful comparisons
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Trina Solar TSM-DE09R.08-420 vs Trina Solar TSM-DE09R-430
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Trina Solar TSM-DE09R.08-420 vs Trina Solar TSM-DE09R-425
2 differences, the largest is product warranty
Same series, other bin
Trina Solar TSM-DE09R.08-420 vs Trina Solar TSM-DE09R.08-425
One difference: module efficiency
06
Written summary
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07
Questions about this pairing
Which panel is better: Trina Solar TSM-DE09R.08-420 or Trina Solar TSM-DE09R-420?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-DE09R.08-420 and Trina Solar TSM-DE09R-420?
Trina Solar TSM-DE09R.08-420 has a module efficiency of 21.00%, while Trina Solar TSM-DE09R-420 is 21.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-DE09R.08-420 use vs Trina Solar TSM-DE09R-420?
Trina Solar TSM-DE09R.08-420 uses PERC cells; Trina Solar TSM-DE09R-420 uses PERC. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.
What is the warranty on Trina Solar TSM-DE09R.08-420 and Trina Solar TSM-DE09R-420?
Trina Solar TSM-DE09R.08-420 has a 25 years power warranty; Trina Solar TSM-DE09R-420 has a 25 years power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80-87%). Product (materials) warranties are usually shorter.
Shop prices: See 241 Trina Solar offers
Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate. The thirty-year projection and the temperature scenarios are calculations from those figures, and each states its assumption above.