Skip to main content
635NEG19RC.20 vs NEG19RC.20-640 18 of 19 identical Swap Change panels

Trina Solar TSM-635NEG19RC.20 vs Trina Solar TSM-NEG19RC.20-640

Trina Solar TSM-635NEG19RC.20
TSM-635NEG19RC.20
635 Wp 23.50 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
TSM-NEG19RC.20-640
640 Wp 23.70 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

NEG19RC.20-640 leads on the differences that matter

The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.

See the one difference
How alike are they
18 of 19 comparable
parameters are identical
identical differs
01

What actually differs

1 of 19 parameters
Parameter 635NEG19RC.20 NEG19RC.20-640 Difference
Module efficiency 23.50 % 23.70 % 0.20 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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
635NEG19RC.20
21,306 kWh
NEG19RC.20-640
21,473 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 635NEG19RC.20 NEG19RC.20-640
Standard test conditions 25 °C 100.0% of rated power 635 W 640 W
Cool, bright day 40 °C 95.7% of rated power 607 W 612 W
Typical summer roof 55 °C 91.3% of rated power 580 W 584 W
Hot roof 70 °C 87.0% of rated power 552 W 556 W
03

Full specification

Parameter 635NEG19RC.20 NEG19RC.20-640 Difference
Power and efficiency
Rated power 635 Wp 640 Wp Effectively the same
Module efficiency 23.50 % 23.70 % +0.20 pp for NEG19RC.20-640
Power density 235.1 Wp/m² 236.9 Wp/m² Effectively the same
Open-circuit voltage 49.10 V 49.30 V Effectively the same
Voltage at max power 40.84 V 41.06 V Effectively the same
Short-circuit current 16.44 A 16.51 A Effectively the same
Current at max power 15.55 A 15.60 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 52.0 kg/kWp 51.6 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

Against the whole database

14,005 panels
Efficiency
#716 vs #517
NEG19RC.20-640 leads by 199 places
Power density
#741 vs #521
NEG19RC.20-640 leads by 220 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#5,408 vs #4,940
NEG19RC.20-640 leads by 468 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,750 vs #1,540
NEG19RC.20-640 leads by 210 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-635NEG19RC.20 vs Trina Solar TSM-NEG21C.20Q-760
13 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-635NEG19RC.20 vs Trina Solar TSM-NEG21C.20Q-755
13 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-635NEG19RC.20 vs Trina Solar TSM-NEG21C.20Q-750
13 differences, the largest is rated power
Same series, other bin
Trina Solar TSM-635NEG19RC.20 vs Trina Solar TSM-NEG21C.20Q-745
13 differences, the largest is rated power
Same series, other bin
Trina Solar TSM-635NEG19RC.20 vs Trina Solar TSM-NEG21C.20-740
10 differences, the largest is rated power
Same series, other bin
Trina Solar TSM-635NEG19RC.20 vs Trina Solar TSM-NEG21C.20 740
10 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-635NEG19RC.20 or Trina Solar TSM-NEG19RC.20-640?
According to our database: Trina Solar TSM-NEG19RC.20-640 has higher module efficiency (23.70% 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-635NEG19RC.20 and Trina Solar TSM-NEG19RC.20-640?
Trina Solar TSM-635NEG19RC.20 has a module efficiency of 23.50%, while Trina Solar TSM-NEG19RC.20-640 is 23.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-635NEG19RC.20 use vs Trina Solar TSM-NEG19RC.20-640?
Trina Solar TSM-635NEG19RC.20 uses TOPCon cells; Trina Solar TSM-NEG19RC.20-640 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-635NEG19RC.20 and Trina Solar TSM-NEG19RC.20-640?
Trina Solar TSM-635NEG19RC.20 has a 30 years power warranty; Trina Solar TSM-NEG19RC.20-640 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-635NEG19RC.20 and Trina Solar TSM-NEG19RC.20-640 bifacial panels?
Both Trina Solar TSM-635NEG19RC.20 and Trina Solar TSM-NEG19RC.20-640 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 248 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.