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NEG21C.20Q-755 vs DE19R-585 2 of 19 identical Swap Change panels

Trina Solar TSM-NEG21C.20Q-755 vs Trina Solar TSM-DE19R-585

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-DE19R-585
TSM-DE19R-585
585 Wp 21.70 % PERC
Open panel page Datasheet PDF
The verdict

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

The largest is module efficiency: 2.60 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 NEG21C.20Q-755 DE19R-585 Difference
Module efficiency 24.30 % 21.70 % 2.60 pp more efficient
Temperature coefficient -0.260 %/°C -0.340 %/°C 0.080 %/°C better in heat
Rated power 755 Wp 585 Wp 170 W more power
Power density 243.1 Wp/m² 216.6 Wp/m² 26.5 Wp/m² higher
Performance warranty 30 yrs 25 yrs 5 yrs longer
Annual degradation 0.35 %/yr 0.55 %/yr 0.20 %/yr slower
Weight 38.3 kg 28.1 kg 10.2 kg lighter
Open-circuit voltage 50.70 V 46.60 V 4.10 V apart
Short-circuit current 18.81 A 15.99 A 2.82 A apart
Module area 3.106 m² 2.701 m² 0.405 m² apart
Cell technology TOPCon PERC TOPCon vs PERC
Weight per kWp 50.7 kg/kWp 48.0 kg/kWp 2.7 kg/kWp lighter
Current at max power 17.69 A 14.90 A 2.79 A apart
Cell count 264 132 132 cells apart
Voltage at max power 42.70 V 39.30 V 3.40 V apart
Bifacial Yes No Yes vs No
Dimensions 2384x1303x33 mm 2382x1134x30 mm 2384x1303x33 mm vs 2382x1134x30 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
NEG21C.20Q-755
25,529 kWh
DE19R-585
18,959 kWh
Lifetime gap
6,570 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario NEG21C.20Q-755 DE19R-585
Standard test conditions 25 °C 100.0% of rated power 755 W 585 W
Cool, bright day 40 °C 94.9% of rated power 726 W 555 W
Typical summer roof 55 °C 89.8% of rated power 696 W 525 W
Hot roof 70 °C 84.7% of rated power 667 W 495 W
03

Full specification

Parameter NEG21C.20Q-755 DE19R-585 Difference
Power and efficiency
Rated power 755 Wp 585 Wp +170 W for NEG21C.20Q-755
Module efficiency 24.30 % 21.70 % +2.60 pp for NEG21C.20Q-755
Power density 243.1 Wp/m² 216.6 Wp/m² +26.5 Wp/m² for NEG21C.20Q-755
Open-circuit voltage 50.70 V 46.60 V 4.10 V apart
Voltage at max power 42.70 V 39.30 V 3.40 V apart
Short-circuit current 18.81 A 15.99 A 2.82 A apart
Current at max power 17.69 A 14.90 A 2.79 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.340 %/°C +0.080 %/°C for NEG21C.20Q-755
Mechanical
Dimensions 2384x1303x33 mm 2382x1134x30 mm 2384x1303x33 mm vs 2382x1134x30 mm
Module area 3.106 m² 2.701 m² 0.405 m² apart
Weight 38.3 kg 28.1 kg -10.2 kg for DE19R-585
Weight per kWp 50.7 kg/kWp 48.0 kg/kWp -2.7 kg/kWp for DE19R-585
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 25 yrs +5 yrs for NEG21C.20Q-755
Annual degradation 0.35 %/yr 0.55 %/yr -0.20 %/yr for NEG21C.20Q-755
Technology
Cell technology TOPCon PERC TOPCon vs PERC
Cell type Monocrystalline Monocrystalline Same
Cell count 264 132 132 cells apart
Bifacial Yes No Yes vs No
04

Against the whole database

14,129 panels
Efficiency
#145 vs #7,485
NEG21C.20Q-755 leads by 7,340 places
Power density
#150 vs #7,645
NEG21C.20Q-755 leads by 7,495 places
Heat behaviour
#515 vs #8,846
NEG21C.20Q-755 leads by 8,331 places
Weight
#4,153 vs #2,027
DE19R-585 leads by 2,126 places
Warranty
#21 vs #9,912
NEG21C.20Q-755 leads by 9,891 places
Overall
#91 vs #6,183
NEG21C.20Q-755 leads by 6,092 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-DE19R-585?
According to our database: Trina Solar TSM-NEG21C.20Q-755 has higher module efficiency (24.30% vs 21.70%); 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-NEG21C.20Q-755 and Trina Solar TSM-DE19R-585?
Trina Solar TSM-NEG21C.20Q-755 has a module efficiency of 24.30%, while Trina Solar TSM-DE19R-585 is 21.70%. 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-DE19R-585?
Trina Solar TSM-NEG21C.20Q-755 uses TOPCon cells; Trina Solar TSM-DE19R-585 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-755 and Trina Solar TSM-DE19R-585?
Trina Solar TSM-NEG21C.20Q-755 has a 30 years power warranty; Trina Solar TSM-DE19R-585 has a 25 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-DE19R-585 bifacial panels?
Trina Solar TSM-NEG21C.20Q-755 is bifacial (captures light from both faces); Trina Solar TSM-DE19R-585 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.