Trina Solar TSM-NEG21C.20 725W vs JA Solar JAM66D46-720/LB
VS
The verdict
Identical on every published parameter
All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.
How alike are they
19
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
0 of 19 parameters
What actually differs
Every comparable parameter agrees. The full specification is below.
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.
TSM-NEG21C.20 725W
24,325 kWh
JAM66D46-720/LB
24,157 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TSM-NEG21C.20 725W
JAM66D46-720/LB
Standard test conditions
25 °C
100.0% of rated power
725 W
720 W
Cool, bright day
40 °C
95.7% of rated power
693 W
689 W
Typical summer roof
55 °C
91.3% of rated power
662 W
657 W
Hot roof
70 °C
87.0% of rated power
630 W
626 W
03
Full specification
Parameter
TSM-NEG21C.20 725W
JAM66D46-720/LB
Difference
Power and efficiency
Rated power
725 Wp
720 Wp
Effectively the same
Module efficiency
23.30 %
23.20 %
Effectively the same
Power density
233.4 Wp/m²
231.8 Wp/m²
Effectively the same
Open-circuit voltage
49.60 V
49.00 V
Effectively the same
Voltage at max power
41.50 V
41.19 V
Effectively the same
Short-circuit current
18.54 A
18.59 A
Effectively the same
Current at max power
17.47 A
17.48 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
38.2 kg
Effectively the same
Weight per kWp
52.8 kg/kWp
53.1 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
14,005 panels
Against the whole database
Efficiency
#1,017
vs
#1,306
TSM-NEG21C.20 725W leads by 289 places
Power density
#936
vs
#1,347
TSM-NEG21C.20 725W leads by 411 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#6,514
vs
#6,810
TSM-NEG21C.20 725W leads by 296 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#424
vs
#516
TSM-NEG21C.20 725W leads by 92 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Trina Solar TSM-NEG21C.20 725W or JA Solar JAM66D46-720/LB?
According to our database: Trina Solar TSM-NEG21C.20 725 W has higher module efficiency (23.30% vs 23.20%). 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 JA Solar JAM66D46-720/LB?
Trina Solar TSM-NEG21C.20 725 W has a module efficiency of 23.30%, while JA Solar JAM66D46-720/LB is 23.20%. 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 JA Solar JAM66D46-720/LB?
Trina Solar TSM-NEG21C.20 725 W uses TOPCon cells; JA Solar JAM66D46-720/LB 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 JA Solar JAM66D46-720/LB?
Trina Solar TSM-NEG21C.20 725 W has a 30 years power warranty; JA Solar JAM66D46-720/LB 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 JA Solar JAM66D46-720/LB bifacial panels?
Both Trina Solar TSM-NEG21C.20 725 W and JA Solar JAM66D46-720/LB 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 227 Trina Solar offers · See 358 JA 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.