Jetion JT790SXt(B) vs Jetion JT750SLk(B)
VS
The verdict
JT750SLk(B) leads on the differences that matter
The largest is temperature coefficient: 0.050 %/°C better in heat. 5 of 19 comparable parameters are identical.
See all 14 differencesHow alike are they
5
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
14 of 19 parameters
What actually differs
Parameter
JT790SXt(B)
JT750SLk(B)
Difference
Temperature coefficient
-0.290 %/°C
-0.240 %/°C
0.050 %/°C better in heat
Module efficiency
23.40 %
24.10 %
0.70 pp more efficient
Rated power
790 Wp
750 Wp
40 W more power
Weight
40.0 kg
36.4 kg
3.6 kg lighter
Power density
233.6 Wp/m²
241.4 Wp/m²
7.8 Wp/m² higher
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
53.98 V
50.70 V
3.28 V apart
Cell technology
TOPCon
HJT
TOPCon vs HJT
Cell count
144
132
12 cells apart
Weight per kWp
50.6 kg/kWp
48.5 kg/kWp
2.1 kg/kWp lighter
Voltage at max power
45.39 V
42.72 V
2.67 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
JT790SXt(B)
26,506 kWh
JT750SLk(B)
25,556 kWh
Lifetime gap
950 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
JT790SXt(B)
JT750SLk(B)
Standard test conditions
25 °C
100.0% of rated power
790 W
750 W
Cool, bright day
40 °C
95.7% of rated power
756 W
723 W
Typical summer roof
55 °C
91.3% of rated power
721 W
696 W
Hot roof
70 °C
87.0% of rated power
687 W
669 W
03
Full specification
Parameter
JT790SXt(B)
JT750SLk(B)
Difference
Power and efficiency
Rated power
790 Wp
750 Wp
+40 W for JT790SXt(B)
Module efficiency
23.40 %
24.10 %
+0.70 pp for JT750SLk(B)
Power density
233.6 Wp/m²
241.4 Wp/m²
+7.8 Wp/m² for JT750SLk(B)
Open-circuit voltage
53.98 V
50.70 V
3.28 V apart
Voltage at max power
45.39 V
42.72 V
2.67 V apart
Short-circuit current
18.61 A
18.71 A
Effectively the same
Current at max power
17.41 A
17.56 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.240 %/°C
+0.050 %/°C for JT750SLk(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 JT750SLk(B)
Weight per kWp
50.6 kg/kWp
48.5 kg/kWp
-2.1 kg/kWp for JT750SLk(B)
Warranty and degradation
Product warranty
12 yrs
15 yrs
+3 yrs for JT750SLk(B)
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.30 %/yr
-0.10 %/yr for JT750SLk(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
14,005 panels
Against the whole database
Efficiency
#882
vs
#219
JT750SLk(B) leads by 663 places
Power density
#928
vs
#219
JT750SLk(B) leads by 709 places
Heat behaviour
#2,165
vs
#13
JT750SLk(B) leads by 2,152 places
Weight
#4,073
vs
#2,337
JT750SLk(B) leads by 1,736 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#76
vs
#72
JT750SLk(B) leads by 4 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Jetion JT790SXt(B) or Jetion JT750SLk(B)?
According to our database: Jetion JT750SLk(B) has higher module efficiency (24.10% vs 23.40%); Jetion JT750SLk(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 JT790SXt(B) and Jetion JT750SLk(B)?
Jetion JT790SXt(B) has a module efficiency of 23.40%, while Jetion JT750SLk(B) is 24.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Jetion JT790SXt(B) use vs Jetion JT750SLk(B)?
Jetion JT790SXt(B) uses TOPCon cells; Jetion JT750SLk(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 JT790SXt(B) and Jetion JT750SLk(B)?
Jetion JT790SXt(B) has a 30 years power warranty; Jetion JT750SLk(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 JT790SXt(B) and Jetion JT750SLk(B) bifacial panels?
Both Jetion JT790SXt(B) and Jetion JT750SLk(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.