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JT745SLk(B) vs JT755SLk(B) 16 of 19 identical Swap Change panels

Jetion JT745SLk(B) vs Jetion JT755SLk(B)

Jetion JT745SLk(B)
Jetion
JT745SLk(B)
745 Wp 24.00 % HJT Bifacial
Open panel page Datasheet PDF
VS
Jetion JT755SLk(B)
Jetion
JT755SLk(B)
755 Wp 24.30 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

JT755SLk(B) leads on the differences that matter

The largest is module efficiency: 0.30 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 JT745SLk(B) JT755SLk(B) Difference
Module efficiency 24.00 % 24.30 % 0.30 pp more efficient
Power density 239.8 Wp/m² 243.1 Wp/m² 3.2 Wp/m² higher
Rated power 745 Wp 755 Wp 10 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.
JT745SLk(B)
25,385 kWh
JT755SLk(B)
25,726 kWh
Lifetime gap
341 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JT745SLk(B) JT755SLk(B)
Standard test conditions 25 °C 100.0% of rated power 745 W 755 W
Cool, bright day 40 °C 96.4% of rated power 718 W 728 W
Typical summer roof 55 °C 92.8% of rated power 691 W 701 W
Hot roof 70 °C 89.2% of rated power 665 W 673 W
03

Full specification

Parameter JT745SLk(B) JT755SLk(B) Difference
Power and efficiency
Rated power 745 Wp 755 Wp +10 W for JT755SLk(B)
Module efficiency 24.00 % 24.30 % +0.30 pp for JT755SLk(B)
Power density 239.8 Wp/m² 243.1 Wp/m² +3.2 Wp/m² for JT755SLk(B)
Open-circuit voltage 50.65 V 50.75 V Effectively the same
Voltage at max power 42.68 V 42.76 V Effectively the same
Short-circuit current 18.62 A 18.80 A Effectively the same
Current at max power 17.46 A 17.66 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 48.9 kg/kWp 48.2 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
#303 vs #131
JT755SLk(B) leads by 172 places
Power density
#339 vs #136
JT755SLk(B) leads by 203 places
Heat behaviour
#13 vs #13
Tied - the same position in the database
Weight
#2,534 vs #2,105
JT755SLk(B) leads by 429 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#97 vs #50
JT755SLk(B) leads by 47 places
05

More useful comparisons

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06

Written summary

07

Questions about this pairing

Which panel is better: Jetion JT745SLk(B) or Jetion JT755SLk(B)?
According to our database: Jetion JT755SLk(B) has higher module efficiency (24.30% vs 24.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jetion JT745SLk(B) and Jetion JT755SLk(B)?
Jetion JT745SLk(B) has a module efficiency of 24.00%, while Jetion JT755SLk(B) is 24.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jetion JT745SLk(B) use vs Jetion JT755SLk(B)?
Jetion JT745SLk(B) uses HJT cells; Jetion JT755SLk(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 JT745SLk(B) and Jetion JT755SLk(B)?
Jetion JT745SLk(B) has a 30 years power warranty; Jetion JT755SLk(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 JT745SLk(B) and Jetion JT755SLk(B) bifacial panels?
Both Jetion JT745SLk(B) and Jetion JT755SLk(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.