Trina Solar TSM-NEG19RC.20-645 vs Trina Solar TSM-635NEG19RC.20
VS
The verdict
NEG19RC.20-645 leads on the differences that matter
The largest is module efficiency: 0.40 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
NEG19RC.20-645
635NEG19RC.20
Difference
Module efficiency
23.90 %
23.50 %
0.40 pp more efficient
Power density
238.8 Wp/m²
235.1 Wp/m²
3.7 Wp/m² higher
Rated power
645 Wp
635 Wp
10 W more power
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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
NEG19RC.20-645
21,641 kWh
635NEG19RC.20
21,306 kWh
Lifetime gap
335 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
NEG19RC.20-645
635NEG19RC.20
Standard test conditions
25 °C
100.0% of rated power
645 W
635 W
Cool, bright day
40 °C
95.7% of rated power
617 W
607 W
Typical summer roof
55 °C
91.3% of rated power
589 W
580 W
Hot roof
70 °C
87.0% of rated power
561 W
552 W
03
Full specification
Parameter
NEG19RC.20-645
635NEG19RC.20
Difference
Power and efficiency
Rated power
645 Wp
635 Wp
+10 W for NEG19RC.20-645
Module efficiency
23.90 %
23.50 %
+0.40 pp for NEG19RC.20-645
Power density
238.8 Wp/m²
235.1 Wp/m²
+3.7 Wp/m² for NEG19RC.20-645
Open-circuit voltage
49.52 V
49.10 V
Effectively the same
Voltage at max power
41.22 V
40.84 V
Effectively the same
Short-circuit current
16.55 A
16.44 A
Effectively the same
Current at max power
15.65 A
15.55 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2382x1134x30 mm
Same
Module area
2.701 m²
2.701 m²
Same
Weight
33.0 kg
33.0 kg
Same
Weight per kWp
51.2 kg/kWp
52.0 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#351
vs
#716
NEG19RC.20-645 leads by 365 places
Power density
#356
vs
#741
NEG19RC.20-645 leads by 385 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#4,522
vs
#5,408
NEG19RC.20-645 leads by 886 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,358
vs
#1,750
NEG19RC.20-645 leads by 392 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-NEG19RC.20-645 or Trina Solar TSM-635NEG19RC.20?
According to our database: Trina Solar TSM-NEG19RC.20-645 has higher module efficiency (23.90% vs 23.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-NEG19RC.20-645 and Trina Solar TSM-635NEG19RC.20?
Trina Solar TSM-NEG19RC.20-645 has a module efficiency of 23.90%, while Trina Solar TSM-635NEG19RC.20 is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG19RC.20-645 use vs Trina Solar TSM-635NEG19RC.20?
Trina Solar TSM-NEG19RC.20-645 uses TOPCon cells; Trina Solar TSM-635NEG19RC.20 uses TOPCon. 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-NEG19RC.20-645 and Trina Solar TSM-635NEG19RC.20?
Trina Solar TSM-NEG19RC.20-645 has a 30 years power warranty; Trina Solar TSM-635NEG19RC.20 has a 30 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.
Are Trina Solar TSM-NEG19RC.20-645 and Trina Solar TSM-635NEG19RC.20 bifacial panels?
Both Trina Solar TSM-NEG19RC.20-645 and Trina Solar TSM-635NEG19RC.20 are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.
Shop prices: See 249 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.