Trina Solar TSM-DE09R.08-420 vs Trina Solar TSM-DE09R.08-425
VS
The verdict
425 leads on the differences that matter
The largest is module efficiency: 0.30 pp more efficient. 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
420
425
Difference
Module efficiency
21.00 %
21.30 %
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.
420
13,612 kWh
425
13,774 kWh
Lifetime gap
162 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
420
425
Standard test conditions
25 °C
100.0% of rated power
420 W
425 W
Cool, bright day
40 °C
94.9% of rated power
399 W
403 W
Typical summer roof
55 °C
89.8% of rated power
377 W
382 W
Hot roof
70 °C
84.7% of rated power
356 W
360 W
03
Full specification
Parameter
420
425
Difference
Power and efficiency
Rated power
420 Wp
425 Wp
Effectively the same
Module efficiency
21.00 %
21.30 %
+0.30 pp for 425
Power density
210.2 Wp/m²
212.7 Wp/m²
Effectively the same
Open-circuit voltage
50.10 V
50.20 V
Effectively the same
Voltage at max power
42.00 V
42.20 V
Effectively the same
Short-circuit current
10.58 A
10.61 A
Effectively the same
Current at max power
10.01 A
10.08 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
51.9 kg/kWp
51.3 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
144
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#9,758
vs
#8,519
425 leads by 1,239 places
Power density
#9,728
vs
#8,733
425 leads by 995 places
Heat behaviour
#8,778
vs
#8,778
Tied - the same position in the database
Weight
#5,315
vs
#4,677
425 leads by 638 places
Warranty
#9,798
vs
#9,798
Tied - the same position in the database
Overall
#11,162
vs
#10,872
425 leads by 290 places
05
Open the full database
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2 differences, the largest is product warranty
Same series, other bin
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One difference: product warranty
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.08-425?
According to our database: Trina Solar TSM-DE09R.08-425 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.08-420 and Trina Solar TSM-DE09R.08-425?
Trina Solar TSM-DE09R.08-420 has a module efficiency of 21.00%, while Trina Solar TSM-DE09R.08-425 is 21.30%. 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.08-425?
Trina Solar TSM-DE09R.08-420 uses PERC cells; Trina Solar TSM-DE09R.08-425 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.08-425?
Trina Solar TSM-DE09R.08-420 has a 25 years power warranty; Trina Solar TSM-DE09R.08-425 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.