Risen RSM132-8-740BHDG vs Risen RSM132-8-745BHDG
VS
The verdict
745BHDG leads on the differences that matter
The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.
See the one differenceHow alike are they
18
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
1 of 19 parameters
What actually differs
Parameter
740BHDG
745BHDG
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 (-0.240 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
740BHDG
25,215 kWh
745BHDG
25,385 kWh
Lifetime gap
170 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
740BHDG
745BHDG
Standard test conditions
25 °C
100.0% of rated power
740 W
745 W
Cool, bright day
40 °C
96.4% of rated power
713 W
718 W
Typical summer roof
55 °C
92.8% of rated power
687 W
691 W
Hot roof
70 °C
89.2% of rated power
660 W
665 W
03
Full specification
Parameter
740BHDG
745BHDG
Difference
Power and efficiency
Rated power
740 Wp
745 Wp
Effectively the same
Module efficiency
23.80 %
24.00 %
+0.20 pp for 745BHDG
Power density
238.2 Wp/m²
239.8 Wp/m²
Effectively the same
Open-circuit voltage
50.47 V
50.54 V
Effectively the same
Voltage at max power
42.32 V
42.38 V
Effectively the same
Short-circuit current
18.56 A
18.65 A
Effectively the same
Current at max power
17.50 A
17.59 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
37.5 kg
37.5 kg
Same
Weight per kWp
50.7 kg/kWp
50.3 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
14,005 panels
Against the whole database
Efficiency
#433
vs
#303
745BHDG leads by 130 places
Power density
#431
vs
#339
745BHDG leads by 92 places
Heat behaviour
#13
vs
#13
Tied - the same position in the database
Weight
#4,101
vs
#3,718
745BHDG leads by 383 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#130
vs
#98
745BHDG leads by 32 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: Risen RSM132-8-740BHDG or Risen RSM132-8-745BHDG?
According to our database: Risen RSM132-8-745BHDG 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 Risen RSM132-8-740BHDG and Risen RSM132-8-745BHDG?
Risen RSM132-8-740BHDG has a module efficiency of 23.80%, while Risen RSM132-8-745BHDG is 24.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Risen RSM132-8-740BHDG use vs Risen RSM132-8-745BHDG?
Risen RSM132-8-740BHDG uses HJT cells; Risen RSM132-8-745BHDG 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 Risen RSM132-8-740BHDG and Risen RSM132-8-745BHDG?
Risen RSM132-8-740BHDG has a 30 years power warranty; Risen RSM132-8-745BHDG 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 Risen RSM132-8-740BHDG and Risen RSM132-8-745BHDG bifacial panels?
Both Risen RSM132-8-740BHDG and Risen RSM132-8-745BHDG 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 23 Risen 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.