Skip to main content
735/LB vs 740/LB 19 of 19 identical Swap Change panels

JA Solar JAM66D46-735/LB vs JA Solar JAM66D46-740/LB

JA Solar JAM66D46-735/LB
JAM66D46-735/LB
735 Wp 23.70 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JA Solar JAM66D46-740/LB
JAM66D46-740/LB
740 Wp 23.80 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

Identical on every published parameter

All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.

How alike are they
19 of 19 comparable
parameters are identical
identical differs
01

What actually differs

0 of 19 parameters

Every comparable parameter agrees. The full specification is below.

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.
735/LB
24,661 kWh
740/LB
24,828 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 735/LB 740/LB
Standard test conditions 25 °C 100.0% of rated power 735 W 740 W
Cool, bright day 40 °C 95.7% of rated power 703 W 708 W
Typical summer roof 55 °C 91.3% of rated power 671 W 676 W
Hot roof 70 °C 87.0% of rated power 639 W 643 W
03

Full specification

Parameter 735/LB 740/LB Difference
Power and efficiency
Rated power 735 Wp 740 Wp Effectively the same
Module efficiency 23.70 % 23.80 % Effectively the same
Power density 236.6 Wp/m² 238.2 Wp/m² Effectively the same
Open-circuit voltage 49.60 V 49.80 V Effectively the same
Voltage at max power 41.77 V 41.96 V Effectively the same
Short-circuit current 18.70 A 18.73 A Effectively the same
Current at max power 17.60 A 17.64 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 52.0 kg/kWp 51.6 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
#517 vs #433
740/LB leads by 84 places
Power density
#582 vs #431
740/LB leads by 151 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#5,413 vs #4,997
740/LB leads by 416 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#233 vs #185
740/LB leads by 48 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM66D46-735/LB vs JA Solar JAM66D46-730/LB
One difference: module efficiency
Same series, other bin
JA Solar JAM66D46-735/LB vs JA Solar JAM66D46-725/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-735/LB vs JA Solar JAM66D46-720/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-735/LB vs JA Solar JAM66D46-715/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-735/LB vs JA Solar JAM66D46-710/LB
5 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM66D46-735/LB vs JA Solar JAM66D46-705/LB
6 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM66D46-735/LB or JA Solar JAM66D46-740/LB?
According to our database: JA Solar JAM66D46-740/LB has higher module efficiency (23.80% vs 23.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM66D46-735/LB and JA Solar JAM66D46-740/LB?
JA Solar JAM66D46-735/LB has a module efficiency of 23.70%, while JA Solar JAM66D46-740/LB is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM66D46-735/LB use vs JA Solar JAM66D46-740/LB?
JA Solar JAM66D46-735/LB uses TOPCon cells; JA Solar JAM66D46-740/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 JAM66D46-735/LB and JA Solar JAM66D46-740/LB?
JA Solar JAM66D46-735/LB has a 30 years power warranty; JA Solar JAM66D46-740/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 JAM66D46-735/LB and JA Solar JAM66D46-740/LB bifacial panels?
Both JA Solar JAM66D46-735/LB and JA Solar JAM66D46-740/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 351 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.