Sunplus 740 vs Sunplus 745
VS
The verdict
745 leads on the differences that matter
The largest is module efficiency: 0.20 pp more efficient. 17 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See the one differenceHow alike are they
17
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
1 of 18 parameters
What actually differs
Parameter
740
745
Difference
Module efficiency
23.80 %
24.00 %
0.20 pp more efficient
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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
740
25,176 kWh
745
25,346 kWh
Lifetime gap
170 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
740
745
Standard test conditions
25 °C
100.0% of rated power
740 W
745 W
Cool, bright day
40 °C
95.5% of rated power
707 W
711 W
Typical summer roof
55 °C
91.0% of rated power
673 W
678 W
Hot roof
70 °C
86.5% of rated power
640 W
644 W
03
Full specification
Parameter
740
745
Difference
Power and efficiency
Rated power
740 Wp
745 Wp
Effectively the same
Module efficiency
23.80 %
24.00 %
+0.20 pp for 745
Power density
238.2 Wp/m²
239.8 Wp/m²
Effectively the same
Open-circuit voltage
51.01 V
51.02 V
Effectively the same
Voltage at max power
43.78 V
44.10 V
Effectively the same
Short-circuit current
17.70 A
17.72 A
Effectively the same
Current at max power
16.78 A
16.84 A
Effectively the same
Temperature
Temperature coefficient
-0.300 %/°C
-0.300 %/°C
Same
Mechanical
Dimensions
2384x1303x35 mm
2384x1303x35 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
39.0 kg
39.0 kg
Same
Weight per kWp
52.7 kg/kWp
52.3 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
-
-
Neither datasheet publishes this
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.31 %/yr
0.31 %/yr
Same
Technology
Cell technology
HJT
HJT
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
156
156
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#433
vs
#303
745 leads by 130 places
Power density
#431
vs
#339
745 leads by 92 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#6,344
vs
#5,847
745 leads by 497 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,031
vs
#836
745 leads by 195 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Sunplus 740 or Sunplus 745?
According to our database: Sunplus 745 has higher module efficiency (24.00% vs 23.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Sunplus 740 and Sunplus 745?
Sunplus 740 has a module efficiency of 23.80%, while Sunplus 745 is 24.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Sunplus 740 use vs Sunplus 745?
Sunplus 740 uses HJT cells; Sunplus 745 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 Sunplus 740 and Sunplus 745?
Sunplus 740 has a 30 years power warranty; Sunplus 745 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 Sunplus 740 and Sunplus 745 bifacial panels?
Both Sunplus 740 and Sunplus 745 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.