Trina Solar TSM-NEG21C.20 740 vs Trina Solar TSM-NEG19RC.70-630
VS
The verdict
NEG21C.20 740 leads on the differences that matter
The largest is rated power: 110 W more power. 9 of 19 comparable parameters are identical.
See all 10 differencesHow alike are they
9
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
10 of 19 parameters
What actually differs
Parameter
NEG21C.20 740
NEG19RC.70-630
Difference
Rated power
740 Wp
630 Wp
110 W more power
Module efficiency
23.80 %
23.30 %
0.50 pp more efficient
Weight
38.3 kg
33.0 kg
5.3 kg lighter
Short-circuit current
18.66 A
16.38 A
2.28 A apart
Module area
3.106 m²
2.701 m²
0.405 m² apart
Power density
238.2 Wp/m²
233.2 Wp/m²
5.0 Wp/m² higher
Current at max power
17.58 A
15.49 A
2.09 A apart
Open-circuit voltage
50.30 V
48.90 V
1.40 V apart
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Voltage at max power
42.10 V
40.68 V
1.42 V 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.
NEG21C.20 740
24,828 kWh
NEG19RC.70-630
21,138 kWh
Lifetime gap
3,690 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
NEG21C.20 740
NEG19RC.70-630
Standard test conditions
25 °C
100.0% of rated power
740 W
630 W
Cool, bright day
40 °C
95.7% of rated power
708 W
603 W
Typical summer roof
55 °C
91.3% of rated power
676 W
575 W
Hot roof
70 °C
87.0% of rated power
643 W
548 W
03
Full specification
Parameter
NEG21C.20 740
NEG19RC.70-630
Difference
Power and efficiency
Rated power
740 Wp
630 Wp
+110 W for NEG21C.20 740
Module efficiency
23.80 %
23.30 %
+0.50 pp for NEG21C.20 740
Power density
238.2 Wp/m²
233.2 Wp/m²
+5.0 Wp/m² for NEG21C.20 740
Open-circuit voltage
50.30 V
48.90 V
1.40 V apart
Voltage at max power
42.10 V
40.68 V
1.42 V apart
Short-circuit current
18.66 A
16.38 A
2.28 A apart
Current at max power
17.58 A
15.49 A
2.09 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Module area
3.106 m²
2.701 m²
0.405 m² apart
Weight
38.3 kg
33.0 kg
-5.3 kg for NEG19RC.70-630
Weight per kWp
51.8 kg/kWp
52.4 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
14,129 panels
Against the whole database
Efficiency
#462
vs
#1,057
NEG21C.20 740 leads by 595 places
Power density
#460
vs
#1,042
NEG21C.20 740 leads by 582 places
Heat behaviour
#2,220
vs
#2,220
Tied - the same position in the database
Weight
#5,156
vs
#5,904
NEG21C.20 740 leads by 748 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#185
vs
#2,003
NEG21C.20 740 leads by 1,818 places
05
Open the full database
More useful comparisons
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Trina Solar TSM-NEG21C.20 740 vs Trina Solar TSM-NEG21C.20Q-760
6 differences, the largest is module efficiency
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Trina Solar TSM-NEG21C.20 740 vs Trina Solar TSM-NEG21C.20Q-755
6 differences, the largest is temperature coefficient
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Trina Solar TSM-NEG21C.20 740 vs Trina Solar TSM-NEG21C.20Q-750
6 differences, the largest is temperature coefficient
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Trina Solar TSM-NEG21C.20 740 vs Trina Solar TSM-NEG21C.20Q-745
4 differences, the largest is temperature coefficient
Same series, other bin
Trina Solar TSM-NEG21C.20 740 vs Trina Solar TSM-NEG21C.20-740
The same specification on paper
Same series, other bin
Trina Solar TSM-NEG21C.20 740 vs Trina Solar TSM-NEG21C.20Q-740
3 differences, the largest is temperature coefficient
06
Written summary
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07
Questions about this pairing
Which panel is better: Trina Solar TSM-NEG21C.20 740 or Trina Solar TSM-NEG19RC.70-630?
According to our database: Trina Solar TSM-NEG21C.20 740 has higher module efficiency (23.80% vs 23.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-NEG21C.20 740 and Trina Solar TSM-NEG19RC.70-630?
Trina Solar TSM-NEG21C.20 740 has a module efficiency of 23.80%, while Trina Solar TSM-NEG19RC.70-630 is 23.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG21C.20 740 use vs Trina Solar TSM-NEG19RC.70-630?
Trina Solar TSM-NEG21C.20 740 uses TOPCon cells; Trina Solar TSM-NEG19RC.70-630 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-NEG21C.20 740 and Trina Solar TSM-NEG19RC.70-630?
Trina Solar TSM-NEG21C.20 740 has a 30 years power warranty; Trina Solar TSM-NEG19RC.70-630 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-NEG21C.20 740 and Trina Solar TSM-NEG19RC.70-630 bifacial panels?
Both Trina Solar TSM-NEG21C.20 740 and Trina Solar TSM-NEG19RC.70-630 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 184 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.