Suntech STP735S-D66-Nsh+ vs Suntech STP715S-D66-Nsh+
VS
The verdict
STP735S-D66-Nsh+ leads on the differences that matter
The largest is module efficiency: 0.70 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
STP735S-D66-Nsh+
STP715S-D66-Nsh+
Difference
Module efficiency
23.70 %
23.00 %
0.70 pp more efficient
Power density
236.6 Wp/m²
230.2 Wp/m²
6.4 Wp/m² higher
Rated power
735 Wp
715 Wp
20 W more power
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 (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
STP735S-D66-Nsh+
24,661 kWh
STP715S-D66-Nsh+
23,990 kWh
Lifetime gap
671 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
STP735S-D66-Nsh+
STP715S-D66-Nsh+
Standard test conditions
25 °C
100.0% of rated power
735 W
715 W
Cool, bright day
40 °C
95.8% of rated power
704 W
685 W
Typical summer roof
55 °C
91.6% of rated power
673 W
655 W
Hot roof
70 °C
87.4% of rated power
642 W
625 W
03
Full specification
Parameter
STP735S-D66-Nsh+
STP715S-D66-Nsh+
Difference
Power and efficiency
Rated power
735 Wp
715 Wp
+20 W for STP735S-D66-Nsh+
Module efficiency
23.70 %
23.00 %
+0.70 pp for STP735S-D66-Nsh+
Power density
236.6 Wp/m²
230.2 Wp/m²
+6.4 Wp/m² for STP735S-D66-Nsh+
Open-circuit voltage
49.86 V
49.06 V
Effectively the same
Voltage at max power
41.47 V
40.67 V
Effectively the same
Short-circuit current
18.58 A
18.42 A
Effectively the same
Current at max power
17.74 A
17.59 A
Effectively the same
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°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
51.0 kg/kWp
52.4 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#517
vs
#1,919
STP735S-D66-Nsh+ leads by 1,402 places
Power density
#582
vs
#2,018
STP735S-D66-Nsh+ leads by 1,436 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#4,360
vs
#5,979
STP735S-D66-Nsh+ leads by 1,619 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#155
vs
#443
STP735S-D66-Nsh+ leads by 288 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: Suntech STP735S-D66-Nsh+ or Suntech STP715S-D66-Nsh+?
According to our database: Suntech STP735S-D66-Nsh+ has higher module efficiency (23.70% vs 23.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Suntech STP735S-D66-Nsh+ and Suntech STP715S-D66-Nsh+?
Suntech STP735S-D66-Nsh+ has a module efficiency of 23.70%, while Suntech STP715S-D66-Nsh+ is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Suntech STP735S-D66-Nsh+ use vs Suntech STP715S-D66-Nsh+?
Suntech STP735S-D66-Nsh+ uses TOPCon cells; Suntech STP715S-D66-Nsh+ 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 Suntech STP735S-D66-Nsh+ and Suntech STP715S-D66-Nsh+?
Suntech STP735S-D66-Nsh+ has a 30 years power warranty; Suntech STP715S-D66-Nsh+ 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 Suntech STP735S-D66-Nsh+ and Suntech STP715S-D66-Nsh+ bifacial panels?
Both Suntech STP735S-D66-Nsh+ and Suntech STP715S-D66-Nsh+ 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 30 Suntech 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.