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JAM60D41-500/LB vs JAM66D45-630/LB 7 of 19 identical Swap Change panels

JA Solar JAM60D41-500/LB vs JA Solar JAM66D45-630/LB

JAM60D41-500/LB
500 Wp 22.60 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JA Solar JAM66D45-630/LB
JAM66D45-630/LB
630 Wp 23.30 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

JAM66D45-630/LB leads on the differences that matter

The largest is module efficiency: 0.70 pp more efficient. 7 of 19 comparable parameters are identical.

See all 12 differences
How alike are they
7 of 19 comparable
parameters are identical
identical differs
01

What actually differs

12 of 19 parameters
Parameter JAM60D41-500/LB JAM66D45-630/LB Difference
Module efficiency 22.60 % 23.30 % 0.70 pp more efficient
Rated power 500 Wp 630 Wp 130 W more power
Weight 27.3 kg 33.1 kg 5.8 kg lighter
Power density 225.8 Wp/m² 233.2 Wp/m² 7.5 Wp/m² higher
Open-circuit voltage 43.85 V 48.90 V 5.05 V apart
Module area 2.215 m² 2.701 m² 0.486 m² apart
Short-circuit current 14.42 A 16.18 A 1.76 A apart
Cell count 120 132 12 cells apart
Current at max power 13.55 A 15.48 A 1.93 A apart
Voltage at max power 36.91 V 40.70 V 3.79 V apart
Weight per kWp 54.6 kg/kWp 52.5 kg/kWp 2.1 kg/kWp lighter
Dimensions 1953x1134x30 mm 2382x1134x30 mm 1953x1134x30 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
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.
JAM60D41-500/LB
16,776 kWh
JAM66D45-630/LB
21,138 kWh
Lifetime gap
4,362 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM60D41-500/LB JAM66D45-630/LB
Standard test conditions 25 °C 100.0% of rated power 500 W 630 W
Cool, bright day 40 °C 95.7% of rated power 478 W 603 W
Typical summer roof 55 °C 91.3% of rated power 457 W 575 W
Hot roof 70 °C 87.0% of rated power 435 W 548 W
03

Full specification

Parameter JAM60D41-500/LB JAM66D45-630/LB Difference
Power and efficiency
Rated power 500 Wp 630 Wp +130 W for JAM66D45-630/LB
Module efficiency 22.60 % 23.30 % +0.70 pp for JAM66D45-630/LB
Power density 225.8 Wp/m² 233.2 Wp/m² +7.5 Wp/m² for JAM66D45-630/LB
Open-circuit voltage 43.85 V 48.90 V 5.05 V apart
Voltage at max power 36.91 V 40.70 V 3.79 V apart
Short-circuit current 14.42 A 16.18 A 1.76 A apart
Current at max power 13.55 A 15.48 A 1.93 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1953x1134x30 mm 2382x1134x30 mm 1953x1134x30 mm vs 2382x1134x30 mm
Module area 2.215 m² 2.701 m² 0.486 m² apart
Weight 27.3 kg 33.1 kg -5.8 kg for JAM60D41-500/LB
Weight per kWp 54.6 kg/kWp 52.5 kg/kWp -2.1 kg/kWp for JAM66D45-630/LB
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 120 132 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#3,658 vs #1,017
JAM66D45-630/LB leads by 2,641 places
Power density
#3,835 vs #1,003
JAM66D45-630/LB leads by 2,832 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#8,949 vs #6,150
JAM66D45-630/LB leads by 2,799 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#7,197 vs #1,978
JAM66D45-630/LB leads by 5,219 places
05

More useful comparisons

Open the full database
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JA Solar JAM60D41-500/LB vs JA Solar JAM66D45-625/LB
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JA Solar JAM60D41-500/LB vs JA Solar JAM66D45-620/LB
11 differences, the largest is rated power
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JA Solar JAM60D41-500/LB vs JA Solar JAM66D45-615/LB
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JA Solar JAM60D41-500/LB vs JA Solar JAM66D45-610/LB
9 differences, the largest is rated power
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JA Solar JAM60D41-500/LB vs JA Solar JAM66D45-605/LB
10 differences, the largest is rated power
Same series, other bin
JA Solar JAM60D41-500/LB vs JA Solar JAM60D41-510/LB
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM60D41-500/LB or JA Solar JAM66D45-630/LB?
According to our database: JA Solar JAM66D45-630/LB has higher module efficiency (23.30% vs 22.60%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM60D41-500/LB and JA Solar JAM66D45-630/LB?
JA Solar JAM60D41-500/LB has a module efficiency of 22.60%, while JA Solar JAM66D45-630/LB is 23.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM60D41-500/LB use vs JA Solar JAM66D45-630/LB?
JA Solar JAM60D41-500/LB uses TOPCon cells; JA Solar JAM66D45-630/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 JA Solar JAM60D41-500/LB and JA Solar JAM66D45-630/LB?
JA Solar JAM60D41-500/LB has a 30 years power warranty; JA Solar JAM66D45-630/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 JA Solar JAM60D41-500/LB and JA Solar JAM66D45-630/LB bifacial panels?
Both JA Solar JAM60D41-500/LB and JA Solar JAM66D45-630/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 386 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.