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DE19R-580 vs NEG21C.20Q-755 2 of 19 identical Swap Change panels

Trina Solar TSM-DE19R-580 vs Trina Solar TSM-NEG21C.20Q-755

Trina Solar TSM-DE19R-580
TSM-DE19R-580
580 Wp 21.50 % PERC
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

NEG21C.20Q-755 leads on the differences that matter

The largest is module efficiency: 2.80 pp more efficient. 2 of 19 comparable parameters are identical.

See all 17 differences
How alike are they
2 of 19 comparable
parameters are identical
identical differs
01

What actually differs

17 of 19 parameters
Parameter DE19R-580 NEG21C.20Q-755 Difference
Module efficiency 21.50 % 24.30 % 2.80 pp more efficient
Temperature coefficient -0.340 %/°C -0.260 %/°C 0.080 %/°C better in heat
Rated power 580 Wp 755 Wp 175 W more power
Power density 214.7 Wp/m² 243.1 Wp/m² 28.3 Wp/m² higher
Performance warranty 25 yrs 30 yrs 5 yrs longer
Annual degradation 0.55 %/yr 0.35 %/yr 0.20 %/yr slower
Weight 28.1 kg 38.3 kg 10.2 kg lighter
Open-circuit voltage 46.30 V 50.70 V 4.40 V apart
Short-circuit current 15.94 A 18.81 A 2.87 A apart
Module area 2.701 m² 3.106 m² 0.405 m² apart
Cell technology PERC TOPCon PERC vs TOPCon
Current at max power 14.86 A 17.69 A 2.83 A apart
Cell count 132 264 132 cells apart
Voltage at max power 39.00 V 42.70 V 3.70 V apart
Weight per kWp 48.4 kg/kWp 50.7 kg/kWp 2.3 kg/kWp lighter
Bifacial No Yes No vs Yes
Dimensions 2382x1134x30 mm 2384x1303x33 mm 2382x1134x30 mm vs 2384x1303x33 mm
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
DE19R-580
18,797 kWh
NEG21C.20Q-755
25,529 kWh
Lifetime gap
6,732 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario DE19R-580 NEG21C.20Q-755
Standard test conditions 25 °C 100.0% of rated power 580 W 755 W
Cool, bright day 40 °C 94.9% of rated power 550 W 726 W
Typical summer roof 55 °C 89.8% of rated power 521 W 696 W
Hot roof 70 °C 84.7% of rated power 491 W 667 W
03

Full specification

Parameter DE19R-580 NEG21C.20Q-755 Difference
Power and efficiency
Rated power 580 Wp 755 Wp +175 W for NEG21C.20Q-755
Module efficiency 21.50 % 24.30 % +2.80 pp for NEG21C.20Q-755
Power density 214.7 Wp/m² 243.1 Wp/m² +28.3 Wp/m² for NEG21C.20Q-755
Open-circuit voltage 46.30 V 50.70 V 4.40 V apart
Voltage at max power 39.00 V 42.70 V 3.70 V apart
Short-circuit current 15.94 A 18.81 A 2.87 A apart
Current at max power 14.86 A 17.69 A 2.83 A apart
Temperature
Temperature coefficient -0.340 %/°C -0.260 %/°C +0.080 %/°C for NEG21C.20Q-755
Mechanical
Dimensions 2382x1134x30 mm 2384x1303x33 mm 2382x1134x30 mm vs 2384x1303x33 mm
Module area 2.701 m² 3.106 m² 0.405 m² apart
Weight 28.1 kg 38.3 kg -10.2 kg for DE19R-580
Weight per kWp 48.4 kg/kWp 50.7 kg/kWp -2.3 kg/kWp for DE19R-580
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 25 yrs 30 yrs +5 yrs for NEG21C.20Q-755
Annual degradation 0.55 %/yr 0.35 %/yr -0.20 %/yr for NEG21C.20Q-755
Technology
Cell technology PERC TOPCon PERC vs TOPCon
Cell type Monocrystalline Monocrystalline Same
Cell count 132 264 132 cells apart
Bifacial No Yes No vs Yes
04

Against the whole database

14,129 panels
Efficiency
#8,022 vs #145
NEG21C.20Q-755 leads by 7,877 places
Power density
#8,259 vs #150
NEG21C.20Q-755 leads by 8,109 places
Heat behaviour
#8,846 vs #515
NEG21C.20Q-755 leads by 8,331 places
Weight
#2,286 vs #4,153
DE19R-580 leads by 1,867 places
Warranty
#9,912 vs #21
NEG21C.20Q-755 leads by 9,891 places
Overall
#6,674 vs #91
NEG21C.20Q-755 leads by 6,583 places
05

More useful comparisons

Open the full database
Same series, other bin
Trina Solar TSM-DE19R-580 vs Trina Solar TSM-DE19R-585
One difference: module efficiency
Same series, other bin
Trina Solar TSM-DE19R-580 vs Trina Solar TSM-DE19R-575
One difference: module efficiency
Same series, other bin
Trina Solar TSM-DE19R-580 vs Trina Solar TSM-DE19R-570
3 differences, the largest is module efficiency
Same series, other bin
Trina Solar TSM-DE19R-580 vs Trina Solar TSM-DE19R-565
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
Same series, other bin
Trina Solar TSM-NEG21C.20Q-755 vs Trina Solar TSM-NEG21C.20Q-750
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-DE19R-580 or Trina Solar TSM-NEG21C.20Q-755?
According to our database: Trina Solar TSM-NEG21C.20Q-755 has higher module efficiency (24.30% vs 21.50%); Trina Solar TSM-NEG21C.20Q-755 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-DE19R-580 and Trina Solar TSM-NEG21C.20Q-755?
Trina Solar TSM-DE19R-580 has a module efficiency of 21.50%, 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-DE19R-580 use vs Trina Solar TSM-NEG21C.20Q-755?
Trina Solar TSM-DE19R-580 uses PERC 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-DE19R-580 and Trina Solar TSM-NEG21C.20Q-755?
Trina Solar TSM-DE19R-580 has a 25 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-DE19R-580 and Trina Solar TSM-NEG21C.20Q-755 bifacial panels?
Trina Solar TSM-NEG21C.20Q-755 is bifacial (captures light from both faces); Trina Solar TSM-DE19R-580 is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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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.