Jetion JT790SXt(B) vs Jetion JT440SNt(B)
VS
The verdict
JT790SXt(B) leads on the differences that matter
The largest is module efficiency: 1.40 pp more efficient. 7 of 19 comparable parameters are identical.
See all 12 differencesHow alike are they
7
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
12 of 19 parameters
What actually differs
Parameter
JT790SXt(B)
JT440SNt(B)
Difference
Module efficiency
23.40 %
22.00 %
1.40 pp more efficient
Rated power
790 Wp
440 Wp
350 W more power
Power density
233.6 Wp/m²
220.2 Wp/m²
13.4 Wp/m² higher
Weight
40.0 kg
23.7 kg
16.3 kg lighter
Open-circuit voltage
53.98 V
35.30 V
18.68 V apart
Short-circuit current
18.61 A
15.92 A
2.69 A apart
Module area
3.381 m²
1.998 m²
1.383 m² apart
Weight per kWp
50.6 kg/kWp
53.9 kg/kWp
3.2 kg/kWp lighter
Voltage at max power
45.39 V
29.50 V
15.89 V apart
Current at max power
17.41 A
14.92 A
2.49 A apart
Cell count
144
96
48 cells apart
Dimensions
2595x1303x33 mm
1762x1134x30 mm
2595x1303x33 mm vs 1762x1134x30 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
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.
JT790SXt(B)
26,506 kWh
JT440SNt(B)
14,763 kWh
Lifetime gap
11,743 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
JT790SXt(B)
JT440SNt(B)
Standard test conditions
25 °C
100.0% of rated power
790 W
440 W
Cool, bright day
40 °C
95.7% of rated power
756 W
421 W
Typical summer roof
55 °C
91.3% of rated power
721 W
402 W
Hot roof
70 °C
87.0% of rated power
687 W
383 W
03
Full specification
Parameter
JT790SXt(B)
JT440SNt(B)
Difference
Power and efficiency
Rated power
790 Wp
440 Wp
+350 W for JT790SXt(B)
Module efficiency
23.40 %
22.00 %
+1.40 pp for JT790SXt(B)
Power density
233.6 Wp/m²
220.2 Wp/m²
+13.4 Wp/m² for JT790SXt(B)
Open-circuit voltage
53.98 V
35.30 V
18.68 V apart
Voltage at max power
45.39 V
29.50 V
15.89 V apart
Short-circuit current
18.61 A
15.92 A
2.69 A apart
Current at max power
17.41 A
14.92 A
2.49 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2595x1303x33 mm
1762x1134x30 mm
2595x1303x33 mm vs 1762x1134x30 mm
Module area
3.381 m²
1.998 m²
1.383 m² apart
Weight
40.0 kg
23.7 kg
-16.3 kg for JT440SNt(B)
Weight per kWp
50.6 kg/kWp
53.9 kg/kWp
-3.2 kg/kWp for JT790SXt(B)
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
144
96
48 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#882
vs
#6,517
JT790SXt(B) leads by 5,635 places
Power density
#928
vs
#6,328
JT790SXt(B) leads by 5,400 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#4,073
vs
#8,009
JT790SXt(B) leads by 3,936 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#76
vs
#9,829
JT790SXt(B) leads by 9,753 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 JT440SNt(B)?
According to our database: Jetion JT790SXt(B) has higher module efficiency (23.40% vs 22.00%). 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 JT440SNt(B)?
Jetion JT790SXt(B) has a module efficiency of 23.40%, while Jetion JT440SNt(B) is 22.00%. 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 JT440SNt(B)?
Jetion JT790SXt(B) uses TOPCon cells; Jetion JT440SNt(B) 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 Jetion JT790SXt(B) and Jetion JT440SNt(B)?
Jetion JT790SXt(B) has a 30 years power warranty; Jetion JT440SNt(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 JT440SNt(B) bifacial panels?
Both Jetion JT790SXt(B) and Jetion JT440SNt(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.
Shop prices: See 2 Jetion 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.