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NEG21C.20-720 vs NE21 725W 15 of 19 identical Swap Change panels

Trina Solar TSM-NEG21C.20-720 vs Trina Solar TSM-NE21 725W

Trina Solar TSM-NEG21C.20-720
TSM-NEG21C.20-720
720 Wp 23.20 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Trina Solar TSM-NE21 725W
TSM-NE21 725W
725 Wp 23.30 % TOPCon
Open panel page Datasheet PDF
The verdict

4 differences, and they point both ways

The largest is performance warranty: 5 yrs longer. 15 of 19 comparable parameters are identical.

See all 4 differences
How alike are they
15 of 19 comparable
parameters are identical
identical differs
01

What actually differs

4 of 19 parameters
Parameter NEG21C.20-720 NE21 725W Difference
Performance warranty 30 yrs 25 yrs 5 yrs longer
Weight 38.3 kg 32.9 kg 5.4 kg lighter
Weight per kWp 53.2 kg/kWp 45.4 kg/kWp 7.8 kg/kWp lighter
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.20-720
24,157 kWh
NE21 725W
24,325 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario NEG21C.20-720 NE21 725W
Standard test conditions 25 °C 100.0% of rated power 720 W 725 W
Cool, bright day 40 °C 95.7% of rated power 689 W 693 W
Typical summer roof 55 °C 91.3% of rated power 657 W 662 W
Hot roof 70 °C 87.0% of rated power 626 W 630 W
03

Full specification

Parameter NEG21C.20-720 NE21 725W Difference
Power and efficiency
Rated power 720 Wp 725 Wp Effectively the same
Module efficiency 23.20 % 23.30 % Effectively the same
Power density 231.8 Wp/m² 233.4 Wp/m² Effectively the same
Open-circuit voltage 49.40 V 49.70 V Effectively the same
Voltage at max power 41.30 V 41.50 V Effectively the same
Short-circuit current 18.49 A 18.49 A Same
Current at max power 17.44 A 17.47 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 725W
Weight per kWp 53.2 kg/kWp 45.4 kg/kWp -7.8 kg/kWp for NE21 725W
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 25 yrs +5 yrs for NEG21C.20-720
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
#1,306 vs #1,017
NE21 725W leads by 289 places
Power density
#1,347 vs #936
NE21 725W leads by 411 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#7,025 vs #717
NE21 725W leads by 6,308 places
Warranty
#21 vs #9,798
NEG21C.20-720 leads by 9,777 places
Overall
#516 vs #794
NEG21C.20-720 leads by 278 places
05

More useful comparisons

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

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG21C.20-720 or Trina Solar TSM-NE21 725W?
According to our database: Trina Solar TSM-NE21 725 W has higher module efficiency (23.30% 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.20-720 and Trina Solar TSM-NE21 725W?
Trina Solar TSM-NEG21C.20-720 has a module efficiency of 23.20%, while Trina Solar TSM-NE21 725 W 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.20-720 use vs Trina Solar TSM-NE21 725W?
Trina Solar TSM-NEG21C.20-720 uses TOPCon cells; Trina Solar TSM-NE21 725 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.20-720 and Trina Solar TSM-NE21 725W?
Trina Solar TSM-NEG21C.20-720 has a 30 years power warranty; Trina Solar TSM-NE21 725 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.20-720 and Trina Solar TSM-NE21 725W bifacial panels?
Trina Solar TSM-NEG21C.20-720 is bifacial (captures light from both faces); Trina Solar TSM-NE21 725 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.