Trina Solar TSM-DE09R.08-420 vs Trina Solar TSM-DE09.08-400
VS
The verdict
DE09R.08-420 leads on the differences that matter
The largest is rated power: 20 W more power. 10 of 19 comparable parameters are identical.
See all 9 differencesHow alike are they
10
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
9 of 19 parameters
What actually differs
Parameter
DE09R.08-420
DE09.08-400
Difference
Rated power
420 Wp
400 Wp
20 W more power
Open-circuit voltage
50.10 V
41.20 V
8.90 V apart
Module area
1.998 m²
1.922 m²
0.076 m² apart
Short-circuit current
10.58 A
12.28 A
1.70 A apart
Module efficiency
21.00 %
20.80 %
0.20 pp more efficient
Voltage at max power
42.00 V
34.20 V
7.80 V apart
Cell count
144
120
24 cells apart
Current at max power
10.01 A
11.70 A
1.69 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.08-420
13,612 kWh
DE09.08-400
12,964 kWh
Lifetime gap
648 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
DE09R.08-420
DE09.08-400
Standard test conditions
25 °C
100.0% of rated power
420 W
400 W
Cool, bright day
40 °C
94.9% of rated power
399 W
380 W
Typical summer roof
55 °C
89.8% of rated power
377 W
359 W
Hot roof
70 °C
84.7% of rated power
356 W
339 W
03
Full specification
Parameter
DE09R.08-420
DE09.08-400
Difference
Power and efficiency
Rated power
420 Wp
400 Wp
+20 W for DE09R.08-420
Module efficiency
21.00 %
20.80 %
+0.20 pp for DE09R.08-420
Power density
210.2 Wp/m²
208.1 Wp/m²
Effectively the same
Open-circuit voltage
50.10 V
41.20 V
8.90 V apart
Voltage at max power
42.00 V
34.20 V
7.80 V apart
Short-circuit current
10.58 A
12.28 A
1.70 A apart
Current at max power
10.01 A
11.70 A
1.69 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
51.9 kg/kWp
52.5 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
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
14,129 panels
Against the whole database
Efficiency
#9,828
vs
#10,533
DE09R.08-420 leads by 705 places
Power density
#9,798
vs
#10,542
DE09R.08-420 leads by 744 places
Heat behaviour
#8,846
vs
#8,846
Tied - the same position in the database
Weight
#5,347
vs
#6,090
DE09R.08-420 leads by 743 places
Warranty
#9,912
vs
#9,912
Tied - the same position in the database
Overall
#11,240
vs
#11,723
DE09R.08-420 leads by 483 places
05
Open the full database
More useful comparisons
Same series, other bin
Trina Solar TSM-DE09R.08-420 vs Trina Solar TSM-DE09R-435
4 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-DE09R.08-420 vs Trina Solar TSM-DE09R.08-435
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-DE09R.08-420 vs Trina Solar TSM-DE09R-430
4 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-DE09R.08-420 vs Trina Solar TSM-DE09R.08-430
3 differences, the largest is module efficiency
Same series, other bin
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
Checking cache...
07
Questions about this pairing
Which panel is better: Trina Solar TSM-DE09R.08-420 or Trina Solar TSM-DE09.08-400?
According to our database: Trina Solar TSM-DE09R.08-420 has higher module efficiency (21.00% vs 20.80%). 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-DE09.08-400?
Trina Solar TSM-DE09R.08-420 has a module efficiency of 21.00%, while Trina Solar TSM-DE09.08-400 is 20.80%. 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-DE09.08-400?
Trina Solar TSM-DE09R.08-420 uses PERC cells; Trina Solar TSM-DE09.08-400 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-DE09.08-400?
Trina Solar TSM-DE09R.08-420 has a 25 years power warranty; Trina Solar TSM-DE09.08-400 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 193 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.