JA Solar JAM66D45-610/LB vs JA Solar JAM54D41-450/LR
VS
The verdict
JAM54D41-450/LR leads on the differences that matter
The largest is rated power: 160 W more power. 7 of 19 comparable parameters are identical.
See all 12 differencesHow alike are they
7
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
12 of 19 parameters
What actually differs
Parameter
JAM66D45-610/LB
JAM54D41-450/LR
Difference
Rated power
610 Wp
450 Wp
160 W more power
Weight
33.1 kg
22.0 kg
11.1 kg lighter
Product warranty
12 yrs
15 yrs
3 yrs longer
Weight per kWp
54.3 kg/kWp
48.9 kg/kWp
5.4 kg/kWp lighter
Open-circuit voltage
48.10 V
40.30 V
7.80 V apart
Module area
2.701 m²
1.998 m²
0.703 m² apart
Short-circuit current
16.05 A
14.41 A
1.64 A apart
Voltage at max power
39.77 V
32.99 V
6.78 V apart
Cell count
132
108
24 cells apart
Current at max power
15.34 A
13.64 A
1.70 A apart
Bifacial
Yes
No
Yes vs No
Dimensions
2382x1134x30 mm
1762x1134x30 mm
2382x1134x30 mm vs 1762x1134x30 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
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.
JAM66D45-610/LB
20,467 kWh
JAM54D41-450/LR
15,098 kWh
Lifetime gap
5,369 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
JAM66D45-610/LB
JAM54D41-450/LR
Standard test conditions
25 °C
100.0% of rated power
610 W
450 W
Cool, bright day
40 °C
95.7% of rated power
583 W
430 W
Typical summer roof
55 °C
91.3% of rated power
557 W
411 W
Hot roof
70 °C
87.0% of rated power
530 W
391 W
03
Full specification
Parameter
JAM66D45-610/LB
JAM54D41-450/LR
Difference
Power and efficiency
Rated power
610 Wp
450 Wp
+160 W for JAM66D45-610/LB
Module efficiency
22.60 %
22.50 %
Effectively the same
Power density
225.8 Wp/m²
225.2 Wp/m²
Effectively the same
Open-circuit voltage
48.10 V
40.30 V
7.80 V apart
Voltage at max power
39.77 V
32.99 V
6.78 V apart
Short-circuit current
16.05 A
14.41 A
1.64 A apart
Current at max power
15.34 A
13.64 A
1.70 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
1762x1134x30 mm
2382x1134x30 mm vs 1762x1134x30 mm
Module area
2.701 m²
1.998 m²
0.703 m² apart
Weight
33.1 kg
22.0 kg
-11.1 kg for JAM54D41-450/LR
Weight per kWp
54.3 kg/kWp
48.9 kg/kWp
-5.4 kg/kWp for JAM54D41-450/LR
Warranty and degradation
Product warranty
12 yrs
15 yrs
+3 yrs for JAM54D41-450/LR
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
108
24 cells apart
Bifacial
Yes
No
Yes vs No
04
14,129 panels
Against the whole database
Efficiency
#3,716
vs
#4,281
JAM66D45-610/LB leads by 565 places
Power density
#3,788
vs
#4,284
JAM66D45-610/LB leads by 496 places
Heat behaviour
#2,220
vs
#2,220
Tied - the same position in the database
Weight
#8,595
vs
#2,569
JAM54D41-450/LR leads by 6,026 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#3,331
vs
#8,461
JAM66D45-610/LB leads by 5,130 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: JA Solar JAM66D45-610/LB or JA Solar JAM54D41-450/LR?
According to our database: JA Solar JAM66D45-610/LB has higher module efficiency (22.60% vs 22.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM66D45-610/LB and JA Solar JAM54D41-450/LR?
JA Solar JAM66D45-610/LB has a module efficiency of 22.60%, while JA Solar JAM54D41-450/LR is 22.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM66D45-610/LB use vs JA Solar JAM54D41-450/LR?
JA Solar JAM66D45-610/LB uses TOPCon cells; JA Solar JAM54D41-450/LR 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 JA Solar JAM66D45-610/LB and JA Solar JAM54D41-450/LR?
JA Solar JAM66D45-610/LB has a 30 years power warranty; JA Solar JAM54D41-450/LR 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 JA Solar JAM66D45-610/LB and JA Solar JAM54D41-450/LR bifacial panels?
JA Solar JAM66D45-610/LB is bifacial (captures light from both faces); JA Solar JAM54D41-450/LR is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Shop prices: See 330 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.