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720/LB vs 715/LB 18 of 19 identical Swap Change panels

JA Solar JAM66D46-720/LB vs JA Solar JAM66D46-715/LB

JA Solar JAM66D46-720/LB
JAM66D46-720/LB
720 Wp 23.20 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JA Solar JAM66D46-715/LB
JAM66D46-715/LB
715 Wp 23.00 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

720/LB 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 720/LB 715/LB Difference
Module efficiency 23.20 % 23.00 % 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.
720/LB
24,157 kWh
715/LB
23,990 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 720/LB 715/LB
Standard test conditions 25 °C 100.0% of rated power 720 W 715 W
Cool, bright day 40 °C 95.7% of rated power 689 W 684 W
Typical summer roof 55 °C 91.3% of rated power 657 W 653 W
Hot roof 70 °C 87.0% of rated power 626 W 622 W
03

Full specification

Parameter 720/LB 715/LB Difference
Power and efficiency
Rated power 720 Wp 715 Wp Effectively the same
Module efficiency 23.20 % 23.00 % +0.20 pp for 720/LB
Power density 231.8 Wp/m² 230.2 Wp/m² Effectively the same
Open-circuit voltage 49.00 V 48.80 V Effectively the same
Voltage at max power 41.19 V 41.00 V Effectively the same
Short-circuit current 18.59 A 18.55 A Effectively the same
Current at max power 17.48 A 17.44 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 38.2 kg 38.2 kg Same
Weight per kWp 53.1 kg/kWp 53.4 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
#1,306 vs #1,919
720/LB leads by 613 places
Power density
#1,347 vs #2,018
720/LB leads by 671 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#6,810 vs #7,356
720/LB leads by 546 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#516 vs #678
720/LB leads by 162 places
05

More useful comparisons

Open the full database
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JA Solar JAM66D46-720/LB vs JA Solar JAM66D46-740/LB
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JA Solar JAM66D46-720/LB vs JA Solar JAM66D46-735/LB
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JA Solar JAM66D46-720/LB vs JA Solar JAM66D46-730/LB
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JA Solar JAM66D46-720/LB vs JA Solar JAM66D46-725/LB
The same specification on paper
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JA Solar JAM66D46-720/LB vs JA Solar JAM66D46-710/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-720/LB vs JA Solar JAM66D46-705/LB
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM66D46-720/LB or JA Solar JAM66D46-715/LB?
According to our database: JA Solar JAM66D46-720/LB has higher module efficiency (23.20% vs 23.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM66D46-720/LB and JA Solar JAM66D46-715/LB?
JA Solar JAM66D46-720/LB has a module efficiency of 23.20%, while JA Solar JAM66D46-715/LB is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM66D46-720/LB use vs JA Solar JAM66D46-715/LB?
JA Solar JAM66D46-720/LB uses TOPCon cells; JA Solar JAM66D46-715/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 JAM66D46-720/LB and JA Solar JAM66D46-715/LB?
JA Solar JAM66D46-720/LB has a 30 years power warranty; JA Solar JAM66D46-715/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 JAM66D46-720/LB and JA Solar JAM66D46-715/LB bifacial panels?
Both JA Solar JAM66D46-720/LB and JA Solar JAM66D46-715/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 390 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.