Trina Solar TSM-DE09R-425 vs Trina Solar TSM-DE09R.08-420
VS
The verdict
2 differences, and they point both ways
The largest is product warranty: 3 yrs longer. 17 of 19 comparable parameters are identical.
See all 2 differencesHow alike are they
17
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
2 of 19 parameters
What actually differs
Parameter
DE09R-425
DE09R.08-420
Difference
Product warranty
12 yrs
15 yrs
3 yrs longer
Module efficiency
21.30 %
21.00 %
0.30 pp more efficient
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-425
13,774 kWh
DE09R.08-420
13,612 kWh
Lifetime gap
162 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
DE09R-425
DE09R.08-420
Standard test conditions
25 °C
100.0% of rated power
425 W
420 W
Cool, bright day
40 °C
94.9% of rated power
403 W
399 W
Typical summer roof
55 °C
89.8% of rated power
382 W
377 W
Hot roof
70 °C
84.7% of rated power
360 W
356 W
03
Full specification
Parameter
DE09R-425
DE09R.08-420
Difference
Power and efficiency
Rated power
425 Wp
420 Wp
Effectively the same
Module efficiency
21.30 %
21.00 %
+0.30 pp for DE09R-425
Power density
212.7 Wp/m²
210.2 Wp/m²
Effectively the same
Open-circuit voltage
50.20 V
50.10 V
Effectively the same
Voltage at max power
42.20 V
42.00 V
Effectively the same
Short-circuit current
10.61 A
10.58 A
Effectively the same
Current at max power
10.08 A
10.01 A
Effectively the 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
51.3 kg/kWp
51.9 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
15 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
#8,519
vs
#9,758
DE09R-425 leads by 1,239 places
Power density
#8,733
vs
#9,728
DE09R-425 leads by 995 places
Heat behaviour
#8,778
vs
#8,778
Tied - the same position in the database
Weight
#4,677
vs
#5,315
DE09R-425 leads by 638 places
Warranty
#9,798
vs
#9,798
Tied - the same position in the database
Overall
#11,217
vs
#11,162
DE09R.08-420 leads by 55 places
05
Open the full database
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Same series, other bin
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Trina Solar TSM-DE09R-425 or Trina Solar TSM-DE09R.08-420?
According to our database: Trina Solar TSM-DE09R-425 has higher module efficiency (21.30% vs 21.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-DE09R-425 and Trina Solar TSM-DE09R.08-420?
Trina Solar TSM-DE09R-425 has a module efficiency of 21.30%, while Trina Solar TSM-DE09R.08-420 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-425 use vs Trina Solar TSM-DE09R.08-420?
Trina Solar TSM-DE09R-425 uses PERC cells; Trina Solar TSM-DE09R.08-420 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-425 and Trina Solar TSM-DE09R.08-420?
Trina Solar TSM-DE09R-425 has a 25 years power warranty; Trina Solar TSM-DE09R.08-420 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.