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20 725W vs 20-730 18 of 19 identical Swap Change panels

Trina Solar TSM-NEG21C.20 725W vs Trina Solar TSM-NEG21C.20-730

TSM-NEG21C.20 725W
725 Wp 23.30 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Trina Solar TSM-NEG21C.20-730
TSM-NEG21C.20-730
730 Wp 23.50 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

20-730 leads on the differences that matter

The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.

See the one difference
How alike are they
18 of 19 comparable
parameters are identical
identical differs
01

What actually differs

1 of 19 parameters
Parameter 20 725W 20-730 Difference
Module efficiency 23.30 % 23.50 % 0.20 pp more efficient
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
Same temp coeff. for both panels (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
20 725W
24,325 kWh
20-730
24,493 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 20 725W 20-730
Standard test conditions 25 °C 100.0% of rated power 725 W 730 W
Cool, bright day 40 °C 95.7% of rated power 693 W 698 W
Typical summer roof 55 °C 91.3% of rated power 662 W 666 W
Hot roof 70 °C 87.0% of rated power 630 W 635 W
03

Full specification

Parameter 20 725W 20-730 Difference
Power and efficiency
Rated power 725 Wp 730 Wp Effectively the same
Module efficiency 23.30 % 23.50 % +0.20 pp for 20-730
Power density 233.4 Wp/m² 235.0 Wp/m² Effectively the same
Open-circuit voltage 49.60 V 49.90 V Effectively the same
Voltage at max power 41.50 V 41.70 V Effectively the same
Short-circuit current 18.54 A 18.58 A Effectively the same
Current at max power 17.47 A 17.51 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
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 52.8 kg/kWp 52.5 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,017 vs #716
20-730 leads by 301 places
Power density
#936 vs #800
20-730 leads by 136 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#6,514 vs #5,993
20-730 leads by 521 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#424 vs #312
20-730 leads by 112 places
05

More useful comparisons

Open the full database
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Trina Solar TSM-NEG21C.20 725W vs Trina Solar TSM-460NEG9R.28
13 differences, the largest is rated power
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Trina Solar TSM-NEG21C.20 725W vs Trina Solar TSM-455NEG9R.28
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Trina Solar TSM-NEG21C.20 725W vs Trina Solar TSM-450NEG9R.28
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Trina Solar TSM-NEG21C.20 725W vs Trina Solar TSM-445NEG9R.28
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Trina Solar TSM-NEG21C.20 725W vs Trina Solar TSM-440NEG9R.28
13 differences, the largest is module efficiency
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Trina Solar TSM-NEG21C.20 725W vs Trina Solar TSM-435NEG9R.28
13 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Trina Solar TSM-NEG21C.20 725W or Trina Solar TSM-NEG21C.20-730?
According to our database: Trina Solar TSM-NEG21C.20-730 has higher module efficiency (23.50% vs 23.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Trina Solar TSM-NEG21C.20 725W and Trina Solar TSM-NEG21C.20-730?
Trina Solar TSM-NEG21C.20 725 W has a module efficiency of 23.30%, while Trina Solar TSM-NEG21C.20-730 is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Trina Solar TSM-NEG21C.20 725W use vs Trina Solar TSM-NEG21C.20-730?
Trina Solar TSM-NEG21C.20 725 W uses TOPCon cells; Trina Solar TSM-NEG21C.20-730 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.20 725W and Trina Solar TSM-NEG21C.20-730?
Trina Solar TSM-NEG21C.20 725 W has a 30 years power warranty; Trina Solar TSM-NEG21C.20-730 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.20 725W and Trina Solar TSM-NEG21C.20-730 bifacial panels?
Both Trina Solar TSM-NEG21C.20 725 W and Trina Solar TSM-NEG21C.20-730 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 238 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.