Trina Solar TSM-NEG21C.20Q-750 vs Trina Solar TSM-DEG21C.20-650
VS
The verdict
NEG21C.20Q-750 leads on the differences that matter
The largest is module efficiency: 3.20 pp more efficient. 9 of 19 comparable parameters are identical.
See all 10 differencesHow alike are they
9
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
10 of 19 parameters
What actually differs
Parameter
NEG21C.20Q-750
DEG21C.20-650
Difference
Module efficiency
24.10 %
20.90 %
3.20 pp more efficient
Temperature coefficient
-0.260 %/°C
-0.340 %/°C
0.080 %/°C better in heat
Rated power
750 Wp
650 Wp
100 W more power
Power density
241.4 Wp/m²
209.2 Wp/m²
32.2 Wp/m² higher
Weight per kWp
51.1 kg/kWp
58.9 kg/kWp
7.9 kg/kWp lighter
Annual degradation
0.35 %/yr
0.45 %/yr
0.10 %/yr slower
Open-circuit voltage
50.50 V
45.50 V
5.00 V apart
Cell technology
TOPCon
PERC
TOPCon vs PERC
Voltage at max power
42.50 V
37.70 V
4.80 V apart
Cell count
264
132
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
NEG21C.20Q-750
25,360 kWh
DEG21C.20-650
21,405 kWh
Lifetime gap
3,955 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
NEG21C.20Q-750
DEG21C.20-650
Standard test conditions
25 °C
100.0% of rated power
750 W
650 W
Cool, bright day
40 °C
94.9% of rated power
721 W
617 W
Typical summer roof
55 °C
89.8% of rated power
692 W
584 W
Hot roof
70 °C
84.7% of rated power
662 W
551 W
03
Full specification
Parameter
NEG21C.20Q-750
DEG21C.20-650
Difference
Power and efficiency
Rated power
750 Wp
650 Wp
+100 W for NEG21C.20Q-750
Module efficiency
24.10 %
20.90 %
+3.20 pp for NEG21C.20Q-750
Power density
241.4 Wp/m²
209.2 Wp/m²
+32.2 Wp/m² for NEG21C.20Q-750
Open-circuit voltage
50.50 V
45.50 V
5.00 V apart
Voltage at max power
42.50 V
37.70 V
4.80 V apart
Short-circuit current
18.77 A
18.35 A
Effectively the same
Current at max power
17.66 A
17.27 A
Effectively the same
Temperature
Temperature coefficient
-0.260 %/°C
-0.340 %/°C
+0.080 %/°C for NEG21C.20Q-750
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
51.1 kg/kWp
58.9 kg/kWp
-7.9 kg/kWp for NEG21C.20Q-750
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.35 %/yr
0.45 %/yr
-0.10 %/yr for NEG21C.20Q-750
Technology
Cell technology
TOPCon
PERC
TOPCon vs PERC
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
264
132
132 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#219
vs
#10,072
NEG21C.20Q-750 leads by 9,853 places
Power density
#219
vs
#10,011
NEG21C.20Q-750 leads by 9,792 places
Heat behaviour
#511
vs
#8,778
NEG21C.20Q-750 leads by 8,267 places
Weight
#4,401
vs
#11,952
NEG21C.20Q-750 leads by 7,551 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#123
vs
#3,971
NEG21C.20Q-750 leads by 3,848 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Trina Solar TSM-NEG21C.20Q-750 or Trina Solar TSM-DEG21C.20-650?
According to our database: Trina Solar TSM-NEG21C.20Q-750 has higher module efficiency (24.10% vs 20.90%); Trina Solar TSM-NEG21C.20Q-750 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-NEG21C.20Q-750 and Trina Solar TSM-DEG21C.20-650?
Trina Solar TSM-NEG21C.20Q-750 has a module efficiency of 24.10%, while Trina Solar TSM-DEG21C.20-650 is 20.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG21C.20Q-750 use vs Trina Solar TSM-DEG21C.20-650?
Trina Solar TSM-NEG21C.20Q-750 uses TOPCon cells; Trina Solar TSM-DEG21C.20-650 uses PERC. 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-750 and Trina Solar TSM-DEG21C.20-650?
Trina Solar TSM-NEG21C.20Q-750 has a 30 years power warranty; Trina Solar TSM-DEG21C.20-650 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-750 and Trina Solar TSM-DEG21C.20-650 bifacial panels?
Both Trina Solar TSM-NEG21C.20Q-750 and Trina Solar TSM-DEG21C.20-650 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.
Shop prices: See 249 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.