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NEG9R.28 455W vs NE21 725W 6 of 19 identical Swap Change panels

Trina Solar TSM-NEG9R.28 455W vs Trina Solar TSM-NE21 725W

Trina Solar TSM-NEG9R.28 455W
TSM-NEG9R.28 455W
455 Wp 22.80 % TOPCon
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

13 differences, and they point both ways

The largest is rated power: 270 W more power. 6 of 19 comparable parameters are identical.

See all 13 differences
How alike are they
6 of 19 comparable
parameters are identical
identical differs
01

What actually differs

13 of 19 parameters
Parameter NEG9R.28 455W NE21 725W Difference
Rated power 455 Wp 725 Wp 270 W more power
Performance warranty 30 yrs 25 yrs 5 yrs longer
Module efficiency 22.80 % 23.30 % 0.50 pp more efficient
Weight 21.0 kg 32.9 kg 11.9 kg lighter
Product warranty 15 yrs 12 yrs 3 yrs longer
Short-circuit current 10.77 A 18.49 A 7.72 A apart
Module area 1.998 m² 3.106 m² 1.108 m² apart
Power density 227.7 Wp/m² 233.4 Wp/m² 5.7 Wp/m² higher
Open-circuit voltage 53.40 V 49.70 V 3.70 V apart
Current at max power 10.11 A 17.47 A 7.36 A apart
Cell count 144 132 12 cells apart
Voltage at max power 45.00 V 41.50 V 3.50 V apart
Dimensions 1762x1134x30 mm 2384x1303x33 mm 1762x1134x30 mm vs 2384x1303x33 mm
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.
NEG9R.28 455W
15,266 kWh
NE21 725W
24,325 kWh
Lifetime gap
9,059 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario NEG9R.28 455W NE21 725W
Standard test conditions 25 °C 100.0% of rated power 455 W 725 W
Cool, bright day 40 °C 95.7% of rated power 435 W 693 W
Typical summer roof 55 °C 91.3% of rated power 415 W 662 W
Hot roof 70 °C 87.0% of rated power 396 W 630 W
03

Full specification

Parameter NEG9R.28 455W NE21 725W Difference
Power and efficiency
Rated power 455 Wp 725 Wp +270 W for NE21 725W
Module efficiency 22.80 % 23.30 % +0.50 pp for NE21 725W
Power density 227.7 Wp/m² 233.4 Wp/m² +5.7 Wp/m² for NE21 725W
Open-circuit voltage 53.40 V 49.70 V 3.70 V apart
Voltage at max power 45.00 V 41.50 V 3.50 V apart
Short-circuit current 10.77 A 18.49 A 7.72 A apart
Current at max power 10.11 A 17.47 A 7.36 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 2384x1303x33 mm 1762x1134x30 mm vs 2384x1303x33 mm
Module area 1.998 m² 3.106 m² 1.108 m² apart
Weight 21.0 kg 32.9 kg -11.9 kg for NEG9R.28 455W
Weight per kWp 46.2 kg/kWp 45.4 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 12 yrs +3 yrs for NEG9R.28 455W
Performance warranty 30 yrs 25 yrs +5 yrs for NEG9R.28 455W
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 144 132 12 cells apart
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#2,714 vs #1,017
NE21 725W leads by 1,697 places
Power density
#2,888 vs #936
NE21 725W leads by 1,952 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#1,016 vs #717
NE21 725W leads by 299 places
Warranty
#21 vs #9,798
NEG9R.28 455W leads by 9,777 places
Overall
#7,730 vs #794
NE21 725W leads by 6,936 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-NEG9R.28 455W vs Trina Solar TSM-470NED9R.28
8 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG9R.28 455W vs Trina Solar TSM-465NED9R.28
6 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG9R.28 455W vs Trina Solar TSM-NEG9R.28-460
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG9R.28 455W vs Trina Solar TSM-NEG9R.28 460W
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG9R.28 455W vs Trina Solar TSM-460NEG9R.28
3 differences, the largest is product warranty
Same series, other bin
Trina Solar TSM-NEG9R.28 455W vs Trina Solar TSM-460 NEG9R.28
3 differences, the largest is product warranty
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG9R.28 455W or Trina Solar TSM-NE21 725W?
According to our database: Trina Solar TSM-NE21 725 W has higher module efficiency (23.30% vs 22.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-NEG9R.28 455W and Trina Solar TSM-NE21 725W?
Trina Solar TSM-NEG9R.28 455 W has a module efficiency of 22.80%, 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-NEG9R.28 455W use vs Trina Solar TSM-NE21 725W?
Trina Solar TSM-NEG9R.28 455 W 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-NEG9R.28 455W and Trina Solar TSM-NE21 725W?
Trina Solar TSM-NEG9R.28 455 W 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.

Shop prices: See 242 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.