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NEG21C.20-735 vs NE21 720W 12 of 19 identical Swap Change panels

Trina Solar TSM-NEG21C.20-735 vs Trina Solar TSM-NE21 720W

Trina Solar TSM-NEG21C.20-735
TSM-NEG21C.20-735
735 Wp 23.70 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Trina Solar TSM-NE21 720W
TSM-NE21 720W
720 Wp 23.20 % TOPCon
Open panel page Datasheet PDF
The verdict

NEG21C.20-735 leads on the differences that matter

The largest is performance warranty: 5 yrs longer. 12 of 19 comparable parameters are identical.

See all 7 differences
How alike are they
12 of 19 comparable
parameters are identical
identical differs
01

What actually differs

7 of 19 parameters
Parameter NEG21C.20-735 NE21 720W Difference
Performance warranty 30 yrs 25 yrs 5 yrs longer
Module efficiency 23.70 % 23.20 % 0.50 pp more efficient
Weight 38.3 kg 32.9 kg 5.4 kg lighter
Weight per kWp 52.1 kg/kWp 45.7 kg/kWp 6.4 kg/kWp lighter
Power density 236.6 Wp/m² 231.8 Wp/m² 4.8 Wp/m² higher
Rated power 735 Wp 720 Wp 15 W more power
Bifacial Yes No Yes vs No
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.20-735
24,661 kWh
NE21 720W
24,157 kWh
Lifetime gap
504 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario NEG21C.20-735 NE21 720W
Standard test conditions 25 °C 100.0% of rated power 735 W 720 W
Cool, bright day 40 °C 95.7% of rated power 703 W 689 W
Typical summer roof 55 °C 91.3% of rated power 671 W 657 W
Hot roof 70 °C 87.0% of rated power 639 W 626 W
03

Full specification

Parameter NEG21C.20-735 NE21 720W Difference
Power and efficiency
Rated power 735 Wp 720 Wp +15 W for NEG21C.20-735
Module efficiency 23.70 % 23.20 % +0.50 pp for NEG21C.20-735
Power density 236.6 Wp/m² 231.8 Wp/m² +4.8 Wp/m² for NEG21C.20-735
Open-circuit voltage 50.10 V 49.40 V Effectively the same
Voltage at max power 41.90 V 41.30 V Effectively the same
Short-circuit current 18.62 A 18.48 A Effectively the same
Current at max power 17.55 A 17.44 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2384x1303x33 mm 2384x1303x33 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 38.3 kg 32.9 kg -5.4 kg for NE21 720W
Weight per kWp 52.1 kg/kWp 45.7 kg/kWp -6.4 kg/kWp for NE21 720W
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 25 yrs +5 yrs for NEG21C.20-735
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 No Yes vs No
04

Against the whole database

14,005 panels
Efficiency
#517 vs #1,306
NEG21C.20-735 leads by 789 places
Power density
#582 vs #1,347
NEG21C.20-735 leads by 765 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#5,576 vs #845
NE21 720W leads by 4,731 places
Warranty
#21 vs #9,798
NEG21C.20-735 leads by 9,777 places
Overall
#233 vs #968
NEG21C.20-735 leads by 735 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-NEG21C.20-735 vs Trina Solar TSM-NEG21C.20-740
The same specification on paper
Same series, other bin
Trina Solar TSM-NEG21C.20-735 vs Trina Solar TSM-NEG21C.20-730
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20-735 vs Trina Solar TSM-NEG21C.20-725
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20-735 vs Trina Solar TSM-NEG21C.20-720
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20-735 vs Trina Solar TSM-NEG21C.20-715
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NE21 720W vs Trina Solar TSM-NE21 725W
The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG21C.20-735 or Trina Solar TSM-NE21 720W?
According to our database: Trina Solar TSM-NEG21C.20-735 has higher module efficiency (23.70% vs 23.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-NEG21C.20-735 and Trina Solar TSM-NE21 720W?
Trina Solar TSM-NEG21C.20-735 has a module efficiency of 23.70%, while Trina Solar TSM-NE21 720 W is 23.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG21C.20-735 use vs Trina Solar TSM-NE21 720W?
Trina Solar TSM-NEG21C.20-735 uses TOPCon cells; Trina Solar TSM-NE21 720 W 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.20-735 and Trina Solar TSM-NE21 720W?
Trina Solar TSM-NEG21C.20-735 has a 30 years power warranty; Trina Solar TSM-NE21 720 W 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.
Are Trina Solar TSM-NEG21C.20-735 and Trina Solar TSM-NE21 720W bifacial panels?
Trina Solar TSM-NEG21C.20-735 is bifacial (captures light from both faces); Trina Solar TSM-NE21 720 W is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Shop prices: See 227 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.