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DEG21C.20-660 vs NEG21C.20Q-760 9 of 19 identical Swap Change panels

Trina Solar TSM-DEG21C.20-660 vs Trina Solar TSM-NEG21C.20Q-760

Trina Solar TSM-DEG21C.20-660
TSM-DEG21C.20-660
660 Wp 21.20 % PERC Bifacial
Open panel page Datasheet PDF
VS
Trina Solar TSM-NEG21C.20Q-760
TSM-NEG21C.20Q-760
760 Wp 24.50 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

NEG21C.20Q-760 leads on the differences that matter

The largest is module efficiency: 3.30 pp more efficient. 9 of 19 comparable parameters are identical.

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

What actually differs

10 of 19 parameters
Parameter DEG21C.20-660 NEG21C.20Q-760 Difference
Module efficiency 21.20 % 24.50 % 3.30 pp more efficient
Temperature coefficient -0.340 %/°C -0.260 %/°C 0.080 %/°C better in heat
Rated power 660 Wp 760 Wp 100 W more power
Power density 212.5 Wp/m² 244.7 Wp/m² 32.2 Wp/m² higher
Weight per kWp 58.0 kg/kWp 50.4 kg/kWp 7.6 kg/kWp lighter
Annual degradation 0.45 %/yr 0.35 %/yr 0.10 %/yr slower
Open-circuit voltage 45.90 V 50.90 V 5.00 V apart
Cell technology PERC TOPCon PERC vs TOPCon
Voltage at max power 38.10 V 42.90 V 4.80 V apart
Cell count 132 264 132 cells 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
DEG21C.20-660
21,734 kWh
NEG21C.20Q-760
25,698 kWh
Lifetime gap
3,964 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario DEG21C.20-660 NEG21C.20Q-760
Standard test conditions 25 °C 100.0% of rated power 660 W 760 W
Cool, bright day 40 °C 94.9% of rated power 626 W 730 W
Typical summer roof 55 °C 89.8% of rated power 593 W 701 W
Hot roof 70 °C 84.7% of rated power 559 W 671 W
03

Full specification

Parameter DEG21C.20-660 NEG21C.20Q-760 Difference
Power and efficiency
Rated power 660 Wp 760 Wp +100 W for NEG21C.20Q-760
Module efficiency 21.20 % 24.50 % +3.30 pp for NEG21C.20Q-760
Power density 212.5 Wp/m² 244.7 Wp/m² +32.2 Wp/m² for NEG21C.20Q-760
Open-circuit voltage 45.90 V 50.90 V 5.00 V apart
Voltage at max power 38.10 V 42.90 V 4.80 V apart
Short-circuit current 18.45 A 18.85 A Effectively the same
Current at max power 17.35 A 17.72 A Effectively the same
Temperature
Temperature coefficient -0.340 %/°C -0.260 %/°C +0.080 %/°C for NEG21C.20Q-760
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 58.0 kg/kWp 50.4 kg/kWp -7.6 kg/kWp for NEG21C.20Q-760
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.45 %/yr 0.35 %/yr -0.10 %/yr for NEG21C.20Q-760
Technology
Cell technology PERC TOPCon PERC vs TOPCon
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
#9,076 vs #74
NEG21C.20Q-760 leads by 9,002 places
Power density
#8,959 vs #86
NEG21C.20Q-760 leads by 8,873 places
Heat behaviour
#8,778 vs #511
NEG21C.20Q-760 leads by 8,267 places
Weight
#11,529 vs #3,780
NEG21C.20Q-760 leads by 7,749 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#3,228 vs #66
NEG21C.20Q-760 leads by 3,162 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-DEG21C.20-660 vs Trina Solar TSM-DEG21C.20-665
One difference: module efficiency
Same series, other bin
Trina Solar TSM-DEG21C.20-660 vs Trina Solar TSM-DEG21C.20-655
The same specification on paper
Same series, other bin
Trina Solar TSM-DEG21C.20-660 vs Trina Solar TSM-DEG21C.20-650
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-DEG21C.20-660 vs Trina Solar TSM-DEG21C.20-645
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20Q-760 vs Trina Solar TSM-NEG21C.20Q-755
One difference: module efficiency
Same series, other bin
Trina Solar TSM-NEG21C.20Q-760 vs Trina Solar TSM-NEG21C.20Q-750
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-DEG21C.20-660 or Trina Solar TSM-NEG21C.20Q-760?
According to our database: Trina Solar TSM-NEG21C.20Q-760 has higher module efficiency (24.50% vs 21.20%); Trina Solar TSM-NEG21C.20Q-760 tolerates heat better (temp coeff -0.260%/°C vs -0.340%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-DEG21C.20-660 and Trina Solar TSM-NEG21C.20Q-760?
Trina Solar TSM-DEG21C.20-660 has a module efficiency of 21.20%, while Trina Solar TSM-NEG21C.20Q-760 is 24.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-DEG21C.20-660 use vs Trina Solar TSM-NEG21C.20Q-760?
Trina Solar TSM-DEG21C.20-660 uses PERC cells; Trina Solar TSM-NEG21C.20Q-760 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-DEG21C.20-660 and Trina Solar TSM-NEG21C.20Q-760?
Trina Solar TSM-DEG21C.20-660 has a 30 years power warranty; Trina Solar TSM-NEG21C.20Q-760 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-DEG21C.20-660 and Trina Solar TSM-NEG21C.20Q-760 bifacial panels?
Both Trina Solar TSM-DEG21C.20-660 and Trina Solar TSM-NEG21C.20Q-760 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.