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705/LB vs 725/LB 14 of 19 identical Swap Change panels

JA Solar JAM66D46-705/LB vs JA Solar JAM66D46-725/LB

JA Solar JAM66D46-705/LB
JAM66D46-705/LB
705 Wp 22.70 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JA Solar JAM66D46-725/LB
JAM66D46-725/LB
725 Wp 23.30 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

725/LB leads on the differences that matter

The largest is module efficiency: 0.60 pp more efficient. 14 of 19 comparable parameters are identical.

See all 5 differences
How alike are they
14 of 19 comparable
parameters are identical
identical differs
01

What actually differs

5 of 19 parameters
Parameter 705/LB 725/LB Difference
Module efficiency 22.70 % 23.30 % 0.60 pp more efficient
Power density 227.0 Wp/m² 233.4 Wp/m² 6.4 Wp/m² higher
Rated power 705 Wp 725 Wp 20 W more power
Open-circuit voltage 48.08 V 49.20 V 1.12 V apart
Voltage at max power 40.27 V 41.39 V 1.12 V apart
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.
705/LB
23,654 kWh
725/LB
24,325 kWh
Lifetime gap
671 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 705/LB 725/LB
Standard test conditions 25 °C 100.0% of rated power 705 W 725 W
Cool, bright day 40 °C 95.7% of rated power 674 W 693 W
Typical summer roof 55 °C 91.3% of rated power 644 W 662 W
Hot roof 70 °C 87.0% of rated power 613 W 630 W
03

Full specification

Parameter 705/LB 725/LB Difference
Power and efficiency
Rated power 705 Wp 725 Wp +20 W for 725/LB
Module efficiency 22.70 % 23.30 % +0.60 pp for 725/LB
Power density 227.0 Wp/m² 233.4 Wp/m² +6.4 Wp/m² for 725/LB
Open-circuit voltage 48.08 V 49.20 V 1.12 V apart
Voltage at max power 40.27 V 41.39 V 1.12 V apart
Short-circuit current 18.42 A 18.63 A Effectively the same
Current at max power 17.30 A 17.52 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 54.2 kg/kWp 52.7 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
#3,307 vs #1,017
725/LB leads by 2,290 places
Power density
#3,361 vs #936
725/LB leads by 2,425 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#8,415 vs #6,337
725/LB leads by 2,078 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,007 vs #424
725/LB leads by 583 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM66D46-705/LB vs JA Solar JAM66D46-740/LB
6 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-705/LB vs JA Solar JAM66D46-735/LB
6 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-705/LB vs JA Solar JAM66D46-730/LB
5 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-705/LB vs JA Solar JAM66D46-720/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-705/LB vs JA Solar JAM66D46-715/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-705/LB vs JA Solar JAM66D46-710/LB
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM66D46-705/LB or JA Solar JAM66D46-725/LB?
According to our database: JA Solar JAM66D46-725/LB has higher module efficiency (23.30% vs 22.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM66D46-705/LB and JA Solar JAM66D46-725/LB?
JA Solar JAM66D46-705/LB has a module efficiency of 22.70%, while JA Solar JAM66D46-725/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 JAM66D46-705/LB use vs JA Solar JAM66D46-725/LB?
JA Solar JAM66D46-705/LB uses TOPCon cells; JA Solar JAM66D46-725/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 JAM66D46-705/LB and JA Solar JAM66D46-725/LB?
JA Solar JAM66D46-705/LB has a 30 years power warranty; JA Solar JAM66D46-725/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 JAM66D46-705/LB and JA Solar JAM66D46-725/LB bifacial panels?
Both JA Solar JAM66D46-705/LB and JA Solar JAM66D46-725/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 394 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.