Trina Solar TSM-DE09R-425 vs Trina Solar TSM-DE09.05-390
VS
The verdict
DE09R-425 leads on the differences that matter
The largest is module efficiency: 1.00 pp more efficient. 7 of 19 comparable parameters are identical.
See all 12 differencesHow alike are they
7
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
12 of 19 parameters
What actually differs
Parameter
DE09R-425
DE09.05-390
Difference
Module efficiency
21.30 %
20.30 %
1.00 pp more efficient
Rated power
425 Wp
390 Wp
35 W more power
Power density
212.7 Wp/m²
202.9 Wp/m²
9.8 Wp/m² higher
Product warranty
12 yrs
25 yrs
13 yrs longer
Open-circuit voltage
50.20 V
40.80 V
9.40 V apart
Module area
1.998 m²
1.922 m²
0.076 m² apart
Short-circuit current
10.61 A
12.14 A
1.53 A apart
Voltage at max power
42.20 V
33.80 V
8.40 V apart
Cell count
144
120
24 cells apart
Weight per kWp
51.3 kg/kWp
53.8 kg/kWp
2.6 kg/kWp lighter
Current at max power
10.08 A
11.54 A
1.46 A apart
Dimensions
1762x1134x30 mm
1754x1096x30 mm
1762x1134x30 mm vs 1754x1096x30 mm
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
DE09.05-390
12,640 kWh
Lifetime gap
1,134 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
DE09R-425
DE09.05-390
Standard test conditions
25 °C
100.0% of rated power
425 W
390 W
Cool, bright day
40 °C
94.9% of rated power
403 W
370 W
Typical summer roof
55 °C
89.8% of rated power
382 W
350 W
Hot roof
70 °C
84.7% of rated power
360 W
330 W
03
Full specification
Parameter
DE09R-425
DE09.05-390
Difference
Power and efficiency
Rated power
425 Wp
390 Wp
+35 W for DE09R-425
Module efficiency
21.30 %
20.30 %
+1.00 pp for DE09R-425
Power density
212.7 Wp/m²
202.9 Wp/m²
+9.8 Wp/m² for DE09R-425
Open-circuit voltage
50.20 V
40.80 V
9.40 V apart
Voltage at max power
42.20 V
33.80 V
8.40 V apart
Short-circuit current
10.61 A
12.14 A
1.53 A apart
Current at max power
10.08 A
11.54 A
1.46 A apart
Temperature
Temperature coefficient
-0.340 %/°C
-0.340 %/°C
Same
Mechanical
Dimensions
1762x1134x30 mm
1754x1096x30 mm
1762x1134x30 mm vs 1754x1096x30 mm
Module area
1.998 m²
1.922 m²
0.076 m² apart
Weight
21.8 kg
21.0 kg
Effectively the same
Weight per kWp
51.3 kg/kWp
53.8 kg/kWp
-2.6 kg/kWp for DE09R-425
Warranty and degradation
Product warranty
12 yrs
25 yrs
+13 yrs for DE09.05-390
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
120
24 cells apart
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#8,519
vs
#11,769
DE09R-425 leads by 3,250 places
Power density
#8,733
vs
#11,787
DE09R-425 leads by 3,054 places
Heat behaviour
#8,778
vs
#8,778
Tied - the same position in the database
Weight
#4,677
vs
#7,897
DE09R-425 leads by 3,220 places
Warranty
#9,798
vs
#9,798
Tied - the same position in the database
Overall
#11,217
vs
#11,008
DE09.05-390 leads by 209 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Trina Solar TSM-DE09R-425 or Trina Solar TSM-DE09.05-390?
According to our database: Trina Solar TSM-DE09R-425 has higher module efficiency (21.30% vs 20.30%). 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-DE09.05-390?
Trina Solar TSM-DE09R-425 has a module efficiency of 21.30%, while Trina Solar TSM-DE09.05-390 is 20.30%. 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-DE09.05-390?
Trina Solar TSM-DE09R-425 uses PERC cells; Trina Solar TSM-DE09.05-390 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-DE09.05-390?
Trina Solar TSM-DE09R-425 has a 25 years power warranty; Trina Solar TSM-DE09.05-390 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 242 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.