Suntech STP625S-H66-Nsh+ vs Suntech STP720S-D66-Nsh+
VS
The verdict
6 differences, and they point both ways
The largest is rated power: 95 W more power. 13 of 19 comparable parameters are identical.
See all 6 differencesHow alike are they
13
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
6 of 19 parameters
What actually differs
Parameter
STP625S-H66-Nsh+
STP720S-D66-Nsh+
Difference
Rated power
625 Wp
720 Wp
95 W more power
Weight
33.1 kg
37.5 kg
4.4 kg lighter
Short-circuit current
16.00 A
18.46 A
2.46 A apart
Module area
2.701 m²
3.106 m²
0.405 m² apart
Current at max power
15.21 A
17.62 A
2.41 A apart
Dimensions
2382x1134x30 mm
2384x1303x33 mm
2382x1134x30 mm vs 2384x1303x33 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 (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
STP625S-H66-Nsh+
20,970 kWh
STP720S-D66-Nsh+
24,157 kWh
Lifetime gap
3,187 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
STP625S-H66-Nsh+
STP720S-D66-Nsh+
Standard test conditions
25 °C
100.0% of rated power
625 W
720 W
Cool, bright day
40 °C
95.8% of rated power
599 W
690 W
Typical summer roof
55 °C
91.6% of rated power
573 W
660 W
Hot roof
70 °C
87.4% of rated power
546 W
629 W
03
Full specification
Parameter
STP625S-H66-Nsh+
STP720S-D66-Nsh+
Difference
Power and efficiency
Rated power
625 Wp
720 Wp
+95 W for STP720S-D66-Nsh+
Module efficiency
23.10 %
23.20 %
Effectively the same
Power density
231.4 Wp/m²
231.8 Wp/m²
Effectively the same
Open-circuit voltage
49.10 V
49.26 V
Effectively the same
Voltage at max power
41.10 V
40.87 V
Effectively the same
Short-circuit current
16.00 A
18.46 A
2.46 A apart
Current at max power
15.21 A
17.62 A
2.41 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.280 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2384x1303x33 mm
2382x1134x30 mm vs 2384x1303x33 mm
Module area
2.701 m²
3.106 m²
0.405 m² apart
Weight
33.1 kg
37.5 kg
-4.4 kg for STP625S-H66-Nsh+
Weight per kWp
53.0 kg/kWp
52.1 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
#1,570
vs
#1,306
STP720S-D66-Nsh+ leads by 264 places
Power density
#1,513
vs
#1,347
STP720S-D66-Nsh+ leads by 166 places
Heat behaviour
#1,309
vs
#1,309
Tied - the same position in the database
Weight
#6,680
vs
#5,516
STP720S-D66-Nsh+ leads by 1,164 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,879
vs
#330
STP720S-D66-Nsh+ leads by 1,549 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 STP625S-H66-Nsh+ or Suntech STP720S-D66-Nsh+?
According to our database: Suntech STP720S-D66-Nsh+ has higher module efficiency (23.20% vs 23.10%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Suntech STP625S-H66-Nsh+ and Suntech STP720S-D66-Nsh+?
Suntech STP625S-H66-Nsh+ has a module efficiency of 23.10%, while Suntech STP720S-D66-Nsh+ is 23.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Suntech STP625S-H66-Nsh+ use vs Suntech STP720S-D66-Nsh+?
Suntech STP625S-H66-Nsh+ uses TOPCon cells; Suntech STP720S-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 STP625S-H66-Nsh+ and Suntech STP720S-D66-Nsh+?
Suntech STP625S-H66-Nsh+ has a 30 years power warranty; Suntech STP720S-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 STP625S-H66-Nsh+ and Suntech STP720S-D66-Nsh+ bifacial panels?
Both Suntech STP625S-H66-Nsh+ and Suntech STP720S-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.