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20Q-755 vs 20-715 10 of 19 identical Swap Change panels

Trina Solar TSM-NEG21C.20Q-755 vs Trina Solar TSM-NEG21C.20-715

Trina Solar TSM-NEG21C.20Q-755
TSM-NEG21C.20Q-755
755 Wp 24.30 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Trina Solar TSM-NEG21C.20-715
TSM-NEG21C.20-715
715 Wp 23.00 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

20Q-755 leads on the differences that matter

The largest is module efficiency: 1.30 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 20Q-755 20-715 Difference
Module efficiency 24.30 % 23.00 % 1.30 pp more efficient
Rated power 755 Wp 715 Wp 40 W more power
Power density 243.1 Wp/m² 230.2 Wp/m² 12.9 Wp/m² higher
Temperature coefficient -0.260 %/°C -0.290 %/°C 0.030 %/°C better in heat
Weight per kWp 50.7 kg/kWp 53.6 kg/kWp 2.8 kg/kWp lighter
Annual degradation 0.35 %/yr 0.40 %/yr 0.05 %/yr slower
Cell count 264 132 132 cells apart
Open-circuit voltage 50.70 V 49.20 V 1.50 V apart
Voltage at max power 42.70 V 41.10 V 1.60 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
20Q-755
25,529 kWh
20-715
23,990 kWh
Lifetime gap
1,539 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 20Q-755 20-715
Standard test conditions 25 °C 100.0% of rated power 755 W 715 W
Cool, bright day 40 °C 95.7% of rated power 726 W 684 W
Typical summer roof 55 °C 91.3% of rated power 696 W 653 W
Hot roof 70 °C 87.0% of rated power 667 W 622 W
03

Full specification

Parameter 20Q-755 20-715 Difference
Power and efficiency
Rated power 755 Wp 715 Wp +40 W for 20Q-755
Module efficiency 24.30 % 23.00 % +1.30 pp for 20Q-755
Power density 243.1 Wp/m² 230.2 Wp/m² +12.9 Wp/m² for 20Q-755
Open-circuit voltage 50.70 V 49.20 V 1.50 V apart
Voltage at max power 42.70 V 41.10 V 1.60 V apart
Short-circuit current 18.81 A 18.44 A Effectively the same
Current at max power 17.69 A 17.40 A Effectively the same
Temperature
Temperature coefficient -0.260 %/°C -0.290 %/°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 50.7 kg/kWp 53.6 kg/kWp -2.8 kg/kWp for 20Q-755
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.40 %/yr -0.05 %/yr for 20Q-755
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 264 132 132 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#131 vs #1,919
20Q-755 leads by 1,788 places
Power density
#136 vs #2,018
20Q-755 leads by 1,882 places
Heat behaviour
#511 vs #2,165
20Q-755 leads by 1,654 places
Weight
#4,131 vs #7,566
20Q-755 leads by 3,435 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#91 vs #678
20Q-755 leads by 587 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-NEG21C.20Q-755 vs Trina Solar TSM-NEG21C.20Q-760
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20Q-755 vs Trina Solar TSM-NEG21C.20Q-750
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20Q-755 vs Trina Solar TSM-NEG21C.20Q-745
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20Q-755 vs Trina Solar TSM-NEG21C.20Q-740
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20Q-755 vs Trina Solar TSM-NEG21C.20Q-735
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20Q-755 vs Trina Solar TSM-NEG19RC.20Q
8 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG21C.20Q-755 or Trina Solar TSM-NEG21C.20-715?
According to our database: Trina Solar TSM-NEG21C.20Q-755 has higher module efficiency (24.30% vs 23.00%); 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.20Q-755 and Trina Solar TSM-NEG21C.20-715?
Trina Solar TSM-NEG21C.20Q-755 has a module efficiency of 24.30%, while Trina Solar TSM-NEG21C.20-715 is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG21C.20Q-755 use vs Trina Solar TSM-NEG21C.20-715?
Trina Solar TSM-NEG21C.20Q-755 uses TOPCon cells; Trina Solar TSM-NEG21C.20-715 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.20Q-755 and Trina Solar TSM-NEG21C.20-715?
Trina Solar TSM-NEG21C.20Q-755 has a 30 years power warranty; Trina Solar TSM-NEG21C.20-715 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.20Q-755 and Trina Solar TSM-NEG21C.20-715 bifacial panels?
Both Trina Solar TSM-NEG21C.20Q-755 and Trina Solar TSM-NEG21C.20-715 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.