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JT785SXt(B) vs JT755SLk(B) 5 of 19 identical Swap Change panels

Jetion JT785SXt(B) vs Jetion JT755SLk(B)

Jetion
JT785SXt(B)
785 Wp 23.20 % TOPCon 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: 1.10 pp more efficient. 5 of 19 comparable parameters are identical.

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

What actually differs

14 of 19 parameters
Parameter JT785SXt(B) JT755SLk(B) Difference
Module efficiency 23.20 % 24.30 % 1.10 pp more efficient
Temperature coefficient -0.290 %/°C -0.240 %/°C 0.050 %/°C better in heat
Power density 232.2 Wp/m² 243.1 Wp/m² 10.9 Wp/m² higher
Rated power 785 Wp 755 Wp 30 W more power
Weight 40.0 kg 36.4 kg 3.6 kg lighter
Product warranty 12 yrs 15 yrs 3 yrs longer
Annual degradation 0.40 %/yr 0.30 %/yr 0.10 %/yr slower
Module area 3.381 m² 3.106 m² 0.275 m² apart
Open-circuit voltage 53.79 V 50.75 V 3.04 V apart
Cell technology TOPCon HJT TOPCon vs HJT
Weight per kWp 51.0 kg/kWp 48.2 kg/kWp 2.7 kg/kWp lighter
Cell count 144 132 12 cells apart
Voltage at max power 45.24 V 42.76 V 2.48 V apart
Dimensions 2595x1303x33 mm 2384x1303x33 mm 2595x1303x33 mm vs 2384x1303x33 mm
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
JT785SXt(B)
26,338 kWh
JT755SLk(B)
25,726 kWh
Lifetime gap
612 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JT785SXt(B) JT755SLk(B)
Standard test conditions 25 °C 100.0% of rated power 785 W 755 W
Cool, bright day 40 °C 95.7% of rated power 751 W 728 W
Typical summer roof 55 °C 91.3% of rated power 717 W 701 W
Hot roof 70 °C 87.0% of rated power 683 W 673 W
03

Full specification

Parameter JT785SXt(B) JT755SLk(B) Difference
Power and efficiency
Rated power 785 Wp 755 Wp +30 W for JT785SXt(B)
Module efficiency 23.20 % 24.30 % +1.10 pp for JT755SLk(B)
Power density 232.2 Wp/m² 243.1 Wp/m² +10.9 Wp/m² for JT755SLk(B)
Open-circuit voltage 53.79 V 50.75 V 3.04 V apart
Voltage at max power 45.24 V 42.76 V 2.48 V apart
Short-circuit current 18.56 A 18.80 A Effectively the same
Current at max power 17.35 A 17.66 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.240 %/°C +0.050 %/°C for JT755SLk(B)
Mechanical
Dimensions 2595x1303x33 mm 2384x1303x33 mm 2595x1303x33 mm vs 2384x1303x33 mm
Module area 3.381 m² 3.106 m² 0.275 m² apart
Weight 40.0 kg 36.4 kg -3.6 kg for JT755SLk(B)
Weight per kWp 51.0 kg/kWp 48.2 kg/kWp -2.7 kg/kWp for JT755SLk(B)
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for JT755SLk(B)
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.30 %/yr -0.10 %/yr for JT755SLk(B)
Technology
Cell technology TOPCon HJT TOPCon vs HJT
Cell type Monocrystalline Monocrystalline Same
Cell count 144 132 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,306 vs #131
JT755SLk(B) leads by 1,175 places
Power density
#1,338 vs #136
JT755SLk(B) leads by 1,202 places
Heat behaviour
#2,165 vs #13
JT755SLk(B) leads by 2,152 places
Weight
#4,327 vs #2,105
JT755SLk(B) leads by 2,222 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#106 vs #50
JT755SLk(B) leads by 56 places
05

More useful comparisons

Open the full database
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Jetion JT785SXt(B) vs Jetion JT800SXt(B)
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Jetion JT785SXt(B) vs Jetion JT795SXt(B)
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Jetion JT785SXt(B) vs Jetion JT790SXt(B)
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Jetion JT785SXt(B) vs Jetion JT780SXt(B)
The same specification on paper
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Jetion JT785SXt(B) vs Jetion JT775SXt(B)
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Jetion JT755SLk(B) vs Jetion JT750SLk(B)
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Jetion JT785SXt(B) or Jetion JT755SLk(B)?
According to our database: Jetion JT755SLk(B) has higher module efficiency (24.30% vs 23.20%); Jetion JT755SLk(B) tolerates heat better (temp coeff -0.240%/°C vs -0.290%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Jetion JT785SXt(B) and Jetion JT755SLk(B)?
Jetion JT785SXt(B) has a module efficiency of 23.20%, 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 JT785SXt(B) use vs Jetion JT755SLk(B)?
Jetion JT785SXt(B) uses TOPCon 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 JT785SXt(B) and Jetion JT755SLk(B)?
Jetion JT785SXt(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 JT785SXt(B) and Jetion JT755SLk(B) bifacial panels?
Both Jetion JT785SXt(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.