Skip to main content
JAM66D46-725/LB vs JAM66D45-650/LB 11 of 19 identical Swap Change panels

JA Solar JAM66D46-725/LB vs JA Solar JAM66D45-650/LB

JA Solar JAM66D46-725/LB
JAM66D46-725/LB
725 Wp 23.30 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JA Solar JAM66D45-650/LB
JAM66D45-650/LB
650 Wp 24.10 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

JAM66D45-650/LB leads on the differences that matter

The largest is module efficiency: 0.80 pp more efficient. 11 of 19 comparable parameters are identical.

See all 8 differences
How alike are they
11 of 19 comparable
parameters are identical
identical differs
01

What actually differs

8 of 19 parameters
Parameter JAM66D46-725/LB JAM66D45-650/LB Difference
Module efficiency 23.30 % 24.10 % 0.80 pp more efficient
Rated power 725 Wp 650 Wp 75 W more power
Weight 38.2 kg 33.1 kg 5.1 kg lighter
Power density 233.4 Wp/m² 240.6 Wp/m² 7.2 Wp/m² higher
Module area 3.106 m² 2.701 m² 0.405 m² apart
Short-circuit current 18.63 A 17.99 A 0.64 A apart
Current at max power 17.52 A 16.30 A 1.22 A apart
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
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.
JAM66D46-725/LB
24,325 kWh
JAM66D45-650/LB
21,809 kWh
Lifetime gap
2,516 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM66D46-725/LB JAM66D45-650/LB
Standard test conditions 25 °C 100.0% of rated power 725 W 650 W
Cool, bright day 40 °C 95.7% of rated power 693 W 622 W
Typical summer roof 55 °C 91.3% of rated power 662 W 593 W
Hot roof 70 °C 87.0% of rated power 630 W 565 W
03

Full specification

Parameter JAM66D46-725/LB JAM66D45-650/LB Difference
Power and efficiency
Rated power 725 Wp 650 Wp +75 W for JAM66D46-725/LB
Module efficiency 23.30 % 24.10 % +0.80 pp for JAM66D45-650/LB
Power density 233.4 Wp/m² 240.6 Wp/m² +7.2 Wp/m² for JAM66D45-650/LB
Open-circuit voltage 49.20 V 49.97 V Effectively the same
Voltage at max power 41.39 V 41.67 V Effectively the same
Short-circuit current 18.63 A 17.99 A 0.64 A apart
Current at max power 17.52 A 16.30 A 1.22 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2384x1303x33 mm 2382x1134x30 mm 2384x1303x33 mm vs 2382x1134x30 mm
Module area 3.106 m² 2.701 m² 0.405 m² apart
Weight 38.2 kg 33.1 kg -5.1 kg for JAM66D45-650/LB
Weight per kWp 52.7 kg/kWp 50.9 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 #219
JAM66D45-650/LB leads by 798 places
Power density
#936 vs #233
JAM66D45-650/LB leads by 703 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#6,337 vs #4,300
JAM66D45-650/LB leads by 2,037 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#424 vs #1,158
JAM66D46-725/LB leads by 734 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM66D46-725/LB vs JA Solar JAM66D46-740/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-725/LB vs JA Solar JAM66D46-735/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-725/LB vs JA Solar JAM66D46-730/LB
One difference: module efficiency
Same series, other bin
JA Solar JAM66D46-725/LB vs JA Solar JAM66D46-720/LB
The same specification on paper
Same series, other bin
JA Solar JAM66D46-725/LB vs JA Solar JAM66D46-715/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-725/LB vs JA Solar JAM66D46-710/LB
4 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM66D46-725/LB or JA Solar JAM66D45-650/LB?
According to our database: JA Solar JAM66D45-650/LB has higher module efficiency (24.10% vs 23.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM66D46-725/LB and JA Solar JAM66D45-650/LB?
JA Solar JAM66D46-725/LB has a module efficiency of 23.30%, while JA Solar JAM66D45-650/LB is 24.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM66D46-725/LB use vs JA Solar JAM66D45-650/LB?
JA Solar JAM66D46-725/LB uses TOPCon cells; JA Solar JAM66D45-650/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 JAM66D46-725/LB and JA Solar JAM66D45-650/LB?
JA Solar JAM66D46-725/LB has a 30 years power warranty; JA Solar JAM66D45-650/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 JAM66D46-725/LB and JA Solar JAM66D45-650/LB bifacial panels?
Both JA Solar JAM66D46-725/LB and JA Solar JAM66D45-650/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 389 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.