Suntech STP730S-D66-Nsh+ vs Suntech STP725S-D66-Nsh+
VS
The verdict
STP730S-D66-Nsh+ 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
STP730S-D66-Nsh+
STP725S-D66-Nsh+
Difference
Module efficiency
23.50 %
23.30 %
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 (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
STP730S-D66-Nsh+
24,493 kWh
STP725S-D66-Nsh+
24,325 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
STP730S-D66-Nsh+
STP725S-D66-Nsh+
Standard test conditions
25 °C
100.0% of rated power
730 W
725 W
Cool, bright day
40 °C
95.8% of rated power
699 W
695 W
Typical summer roof
55 °C
91.6% of rated power
669 W
664 W
Hot roof
70 °C
87.4% of rated power
638 W
634 W
03
Full specification
Parameter
STP730S-D66-Nsh+
STP725S-D66-Nsh+
Difference
Power and efficiency
Rated power
730 Wp
725 Wp
Effectively the same
Module efficiency
23.50 %
23.30 %
+0.20 pp for STP730S-D66-Nsh+
Power density
235.0 Wp/m²
233.4 Wp/m²
Effectively the same
Open-circuit voltage
49.66 V
49.46 V
Effectively the same
Voltage at max power
41.27 V
41.07 V
Effectively the same
Short-circuit current
18.54 A
18.50 A
Effectively the same
Current at max power
17.70 A
17.66 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
51.4 kg/kWp
51.7 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
#716
vs
#1,017
STP730S-D66-Nsh+ leads by 301 places
Power density
#800
vs
#936
STP730S-D66-Nsh+ leads by 136 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#4,748
vs
#5,085
STP730S-D66-Nsh+ leads by 337 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#196
vs
#263
STP730S-D66-Nsh+ leads by 67 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 STP730S-D66-Nsh+ or Suntech STP725S-D66-Nsh+?
According to our database: Suntech STP730S-D66-Nsh+ has higher module efficiency (23.50% vs 23.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Suntech STP730S-D66-Nsh+ and Suntech STP725S-D66-Nsh+?
Suntech STP730S-D66-Nsh+ has a module efficiency of 23.50%, while Suntech STP725S-D66-Nsh+ is 23.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Suntech STP730S-D66-Nsh+ use vs Suntech STP725S-D66-Nsh+?
Suntech STP730S-D66-Nsh+ uses TOPCon cells; Suntech STP725S-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 STP730S-D66-Nsh+ and Suntech STP725S-D66-Nsh+?
Suntech STP730S-D66-Nsh+ has a 30 years power warranty; Suntech STP725S-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 STP730S-D66-Nsh+ and Suntech STP725S-D66-Nsh+ bifacial panels?
Both Suntech STP730S-D66-Nsh+ and Suntech STP725S-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 29 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.