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NEG19R.20-635 vs NEG19RC.20-640 11 of 19 identical Swap Change panels

Trina Solar TSM-NEG19R.20-635 vs Trina Solar TSM-NEG19RC.20-640

Trina Solar TSM-NEG19R.20-635
TSM-NEG19R.20-635
635 Wp 23.50 % TOPCon
Open panel page Datasheet PDF
VS
TSM-NEG19RC.20-640
640 Wp 23.70 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

NEG19R.20-635 leads on the differences that matter

The largest is weight: 3.0 kg lighter. 11 of 19 comparable parameters are identical.

See all 8 differences
How alike are they
11 of 19 comparable
parameters are identical
identical differs
01

What actually differs

8 of 19 parameters
Parameter NEG19R.20-635 NEG19RC.20-640 Difference
Weight 30.0 kg 33.0 kg 3.0 kg lighter
Weight per kWp 47.2 kg/kWp 51.6 kg/kWp 4.3 kg/kWp lighter
Module efficiency 23.50 % 23.70 % 0.20 pp more efficient
Bifacial No Yes No vs Yes
Open-circuit voltage 50.50 V 49.30 V 1.20 V apart
Short-circuit current 15.94 A 16.51 A 0.57 A apart
Voltage at max power 42.30 V 41.06 V 1.24 V apart
Current at max power 15.02 A 15.60 A 0.58 A apart
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.
NEG19R.20-635
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 NEG19R.20-635 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 NEG19R.20-635 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 50.50 V 49.30 V 1.20 V apart
Voltage at max power 42.30 V 41.06 V 1.24 V apart
Short-circuit current 15.94 A 16.51 A 0.57 A apart
Current at max power 15.02 A 15.60 A 0.58 A apart
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 30.0 kg 33.0 kg -3.0 kg for NEG19R.20-635
Weight per kWp 47.2 kg/kWp 51.6 kg/kWp -4.3 kg/kWp for NEG19R.20-635
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 No Yes No vs Yes
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
#1,596 vs #4,940
NEG19R.20-635 leads by 3,344 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,704 vs #1,540
NEG19RC.20-640 leads by 164 places
05

More useful comparisons

Open the full database
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Trina Solar TSM-NEG19R.20-635 vs Trina Solar TSM-NEG19RC.20-650
8 differences, the largest is module efficiency
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Trina Solar TSM-NEG19R.20-635 vs Trina Solar TSM-NEG19RC.20-645
9 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG19R.20-635 vs Trina Solar TSM-NED19RC.20
9 differences, the largest is weight
Same series, other bin
Trina Solar TSM-NEG19R.20-635 vs Trina Solar TSM-NEG19RC.20-635
7 differences, the largest is weight
Same series, other bin
Trina Solar TSM-NEG19R.20-635 vs Trina Solar TSM-635NEG19RC.20
7 differences, the largest is weight
Same series, other bin
Trina Solar TSM-NEG19R.20-635 vs Trina Solar TSM-NEG19R.20-630
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG19R.20-635 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-NEG19R.20-635 and Trina Solar TSM-NEG19RC.20-640?
Trina Solar TSM-NEG19R.20-635 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-NEG19R.20-635 use vs Trina Solar TSM-NEG19RC.20-640?
Trina Solar TSM-NEG19R.20-635 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-NEG19R.20-635 and Trina Solar TSM-NEG19RC.20-640?
Trina Solar TSM-NEG19R.20-635 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-NEG19R.20-635 and Trina Solar TSM-NEG19RC.20-640 bifacial panels?
Trina Solar TSM-NEG19RC.20-640 is bifacial (captures light from both faces); Trina Solar TSM-NEG19R.20-635 is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.