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20 725 vs 20-740 16 of 19 identical Swap Change panels

Trina Solar TSM-NEG21C.20 725 vs Trina Solar TSM-NEG21C.20-740

Trina Solar TSM-NEG21C.20 725
TSM-NEG21C.20 725
725 Wp 23.30 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Trina Solar TSM-NEG21C.20-740
TSM-NEG21C.20-740
740 Wp 23.80 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

20-740 leads on the differences that matter

The largest is module efficiency: 0.50 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 20 725 20-740 Difference
Module efficiency 23.30 % 23.80 % 0.50 pp more efficient
Power density 233.4 Wp/m² 238.2 Wp/m² 4.8 Wp/m² higher
Rated power 725 Wp 740 Wp 15 W more power
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.
20 725
24,325 kWh
20-740
24,828 kWh
Lifetime gap
503 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 20 725 20-740
Standard test conditions 25 °C 100.0% of rated power 725 W 740 W
Cool, bright day 40 °C 95.7% of rated power 693 W 708 W
Typical summer roof 55 °C 91.3% of rated power 662 W 676 W
Hot roof 70 °C 87.0% of rated power 630 W 643 W
03

Full specification

Parameter 20 725 20-740 Difference
Power and efficiency
Rated power 725 Wp 740 Wp +15 W for 20-740
Module efficiency 23.30 % 23.80 % +0.50 pp for 20-740
Power density 233.4 Wp/m² 238.2 Wp/m² +4.8 Wp/m² for 20-740
Open-circuit voltage 49.60 V 50.30 V Effectively the same
Voltage at max power 41.50 V 42.10 V Effectively the same
Short-circuit current 18.54 A 18.66 A Effectively the same
Current at max power 17.47 A 17.58 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 38.3 kg Same
Weight per kWp 52.8 kg/kWp 51.8 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

Against the whole database

14,005 panels
Efficiency
#1,017 vs #433
20-740 leads by 584 places
Power density
#936 vs #431
20-740 leads by 505 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#6,514 vs #5,125
20-740 leads by 1,389 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#424 vs #185
20-740 leads by 239 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-NEG21C.20 725 vs Trina Solar TSM-NEG21C.20Q-760
9 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20 725 vs Trina Solar TSM-NEG21C.20Q-755
9 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20 725 vs Trina Solar TSM-NEG21C.20Q-750
7 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20 725 vs Trina Solar TSM-NEG21C.20Q-745
6 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20 725 vs Trina Solar TSM-NEG21C.20 740
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20 725 vs Trina Solar TSM-NEG21C.20Q-740
6 differences, the largest is temperature coefficient
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG21C.20 725 or Trina Solar TSM-NEG21C.20-740?
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.20 725 and Trina Solar TSM-NEG21C.20-740?
Trina Solar TSM-NEG21C.20 725 has a module efficiency of 23.30%, while Trina Solar TSM-NEG21C.20-740 is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG21C.20 725 use vs Trina Solar TSM-NEG21C.20-740?
Trina Solar TSM-NEG21C.20 725 uses TOPCon cells; Trina Solar TSM-NEG21C.20-740 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.20 725 and Trina Solar TSM-NEG21C.20-740?
Trina Solar TSM-NEG21C.20 725 has a 30 years power warranty; Trina Solar TSM-NEG21C.20-740 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.20 725 and Trina Solar TSM-NEG21C.20-740 bifacial panels?
Both Trina Solar TSM-NEG21C.20 725 and Trina Solar TSM-NEG21C.20-740 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.

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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.