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20-725 vs 20Q-755 10 of 19 identical Swap Change panels

Trina Solar TSM-NEG21C.20-725 vs Trina Solar TSM-NEG21C.20Q-755

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.20Q-755
TSM-NEG21C.20Q-755
755 Wp 24.30 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

20Q-755 leads on the differences that matter

The largest is module efficiency: 1.00 pp more efficient. 10 of 19 comparable parameters are identical.

See all 9 differences
How alike are they
10 of 19 comparable
parameters are identical
identical differs
01

What actually differs

9 of 19 parameters
Parameter 20-725 20Q-755 Difference
Module efficiency 23.30 % 24.30 % 1.00 pp more efficient
Temperature coefficient -0.290 %/°C -0.260 %/°C 0.030 %/°C better in heat
Power density 233.4 Wp/m² 243.1 Wp/m² 9.7 Wp/m² higher
Rated power 725 Wp 755 Wp 30 W more power
Annual degradation 0.40 %/yr 0.35 %/yr 0.05 %/yr slower
Cell count 132 264 132 cells apart
Weight per kWp 52.8 kg/kWp 50.7 kg/kWp 2.1 kg/kWp lighter
Open-circuit voltage 49.60 V 50.70 V 1.10 V apart
Voltage at max power 41.50 V 42.70 V 1.20 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
20-725
24,325 kWh
20Q-755
25,529 kWh
Lifetime gap
1,204 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 20-725 20Q-755
Standard test conditions 25 °C 100.0% of rated power 725 W 755 W
Cool, bright day 40 °C 95.7% of rated power 693 W 726 W
Typical summer roof 55 °C 91.3% of rated power 662 W 696 W
Hot roof 70 °C 87.0% of rated power 630 W 667 W
03

Full specification

Parameter 20-725 20Q-755 Difference
Power and efficiency
Rated power 725 Wp 755 Wp +30 W for 20Q-755
Module efficiency 23.30 % 24.30 % +1.00 pp for 20Q-755
Power density 233.4 Wp/m² 243.1 Wp/m² +9.7 Wp/m² for 20Q-755
Open-circuit voltage 49.60 V 50.70 V 1.10 V apart
Voltage at max power 41.50 V 42.70 V 1.20 V apart
Short-circuit current 18.54 A 18.81 A Effectively the same
Current at max power 17.47 A 17.69 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.260 %/°C +0.030 %/°C for 20Q-755
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 50.7 kg/kWp -2.1 kg/kWp for 20Q-755
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.35 %/yr -0.05 %/yr for 20Q-755
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 264 132 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,017 vs #131
20Q-755 leads by 886 places
Power density
#936 vs #136
20Q-755 leads by 800 places
Heat behaviour
#2,165 vs #511
20Q-755 leads by 1,654 places
Weight
#6,514 vs #4,131
20Q-755 leads by 2,383 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#424 vs #91
20Q-755 leads by 333 places
05

More useful comparisons

Open the full database
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.20-735
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20-725 vs Trina Solar TSM-NEG21C.20-730
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20-725 vs Trina Solar TSM-NEG21C.20-720
The same specification on paper
Same series, other bin
Trina Solar TSM-NEG21C.20-725 vs Trina Solar TSM-NEG21C.20-715
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20Q-755 vs Trina Solar TSM-NEG21C.20Q-760
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG21C.20-725 or Trina Solar TSM-NEG21C.20Q-755?
According to our database: Trina Solar TSM-NEG21C.20Q-755 has higher module efficiency (24.30% vs 23.30%); Trina Solar TSM-NEG21C.20Q-755 tolerates heat better (temp coeff -0.260%/°C vs -0.290%/°C). 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.20Q-755?
Trina Solar TSM-NEG21C.20-725 has a module efficiency of 23.30%, while Trina Solar TSM-NEG21C.20Q-755 is 24.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG21C.20-725 use vs Trina Solar TSM-NEG21C.20Q-755?
Trina Solar TSM-NEG21C.20-725 uses TOPCon cells; Trina Solar TSM-NEG21C.20Q-755 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.20Q-755?
Trina Solar TSM-NEG21C.20-725 has a 30 years power warranty; Trina Solar TSM-NEG21C.20Q-755 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.20Q-755 bifacial panels?
Both Trina Solar TSM-NEG21C.20-725 and Trina Solar TSM-NEG21C.20Q-755 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.