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JT725SLk(B) vs JT740SLk(B) 16 of 19 identical Swap Change panels

Jetion JT725SLk(B) vs Jetion JT740SLk(B)

Jetion JT725SLk(B)
Jetion
JT725SLk(B)
725 Wp 23.40 % HJT Bifacial
Open panel page Datasheet PDF
VS
Jetion JT740SLk(B)
Jetion
JT740SLk(B)
740 Wp 23.80 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

JT740SLk(B) leads on the differences that matter

The largest is module efficiency: 0.40 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter JT725SLk(B) JT740SLk(B) Difference
Module efficiency 23.40 % 23.80 % 0.40 pp more efficient
Power density 233.4 Wp/m² 238.2 Wp/m² 4.8 Wp/m² higher
Rated power 725 Wp 740 Wp 15 W more power
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 (-0.240 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
JT725SLk(B)
24,704 kWh
JT740SLk(B)
25,215 kWh
Lifetime gap
511 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JT725SLk(B) JT740SLk(B)
Standard test conditions 25 °C 100.0% of rated power 725 W 740 W
Cool, bright day 40 °C 96.4% of rated power 699 W 713 W
Typical summer roof 55 °C 92.8% of rated power 673 W 687 W
Hot roof 70 °C 89.2% of rated power 647 W 660 W
03

Full specification

Parameter JT725SLk(B) JT740SLk(B) Difference
Power and efficiency
Rated power 725 Wp 740 Wp +15 W for JT740SLk(B)
Module efficiency 23.40 % 23.80 % +0.40 pp for JT740SLk(B)
Power density 233.4 Wp/m² 238.2 Wp/m² +4.8 Wp/m² for JT740SLk(B)
Open-circuit voltage 50.45 V 50.60 V Effectively the same
Voltage at max power 42.52 V 42.64 V Effectively the same
Short-circuit current 18.26 A 18.53 A Effectively the same
Current at max power 17.06 A 17.36 A Effectively the same
Temperature
Temperature coefficient -0.240 %/°C -0.240 %/°C Same
Mechanical
Dimensions 2384x1303x33 mm 2384x1303x33 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 36.4 kg 36.4 kg Same
Weight per kWp 50.2 kg/kWp 49.2 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.30 %/yr 0.30 %/yr Same
Technology
Cell technology HJT HJT Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#882 vs #433
JT740SLk(B) leads by 449 places
Power density
#936 vs #431
JT740SLk(B) leads by 505 places
Heat behaviour
#13 vs #13
Tied - the same position in the database
Weight
#3,667 vs #2,789
JT740SLk(B) leads by 878 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#242 vs #128
JT740SLk(B) leads by 114 places
05

More useful comparisons

Open the full database
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Jetion JT725SLk(B) vs Jetion JT755SLk(B)
5 differences, the largest is module efficiency
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Jetion JT725SLk(B) vs Jetion JT750SLk(B)
4 differences, the largest is module efficiency
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Jetion JT725SLk(B) vs Jetion JT745SLk(B)
3 differences, the largest is module efficiency
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Jetion JT725SLk(B) vs Jetion JT735SLk(B)
3 differences, the largest is module efficiency
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Jetion JT725SLk(B) vs Jetion JT730SLk(B)
The same specification on paper
Same series, other bin
Jetion
Jetion JT725SLk(B) vs Jetion JT720SLk(B)
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Jetion JT725SLk(B) or Jetion JT740SLk(B)?
According to our database: Jetion JT740SLk(B) has higher module efficiency (23.80% vs 23.40%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jetion JT725SLk(B) and Jetion JT740SLk(B)?
Jetion JT725SLk(B) has a module efficiency of 23.40%, while Jetion JT740SLk(B) is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jetion JT725SLk(B) use vs Jetion JT740SLk(B)?
Jetion JT725SLk(B) uses HJT cells; Jetion JT740SLk(B) uses HJT. 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 Jetion JT725SLk(B) and Jetion JT740SLk(B)?
Jetion JT725SLk(B) has a 30 years power warranty; Jetion JT740SLk(B) 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 Jetion JT725SLk(B) and Jetion JT740SLk(B) bifacial panels?
Both Jetion JT725SLk(B) and Jetion JT740SLk(B) 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.

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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.