Suntech STP730S-D66-Nsh+ vs Suntech STP-NT11/66QGDF-670
VS
The verdict
STP-NT11/66QGDF-670 leads on the differences that matter
The largest is module efficiency: 1.30 pp more efficient. 7 of 19 comparable parameters are identical.
See all 12 differencesHow alike are they
7
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
12 of 19 parameters
What actually differs
Parameter
STP730S-D66-Nsh+
STP-NT11/66QGDF-670
Difference
Module efficiency
23.50 %
24.80 %
1.30 pp more efficient
Rated power
730 Wp
670 Wp
60 W more power
Power density
235.0 Wp/m²
248.0 Wp/m²
13.0 Wp/m² higher
Weight
37.5 kg
33.1 kg
4.4 kg lighter
Temperature coefficient
-0.280 %/°C
-0.260 %/°C
0.020 %/°C better in heat
Module area
3.106 m²
2.701 m²
0.405 m² apart
Short-circuit current
18.54 A
16.64 A
1.90 A apart
Annual degradation
0.40 %/yr
0.35 %/yr
0.05 %/yr slower
Cell count
132
264
132 cells apart
Current at max power
17.70 A
15.84 A
1.86 A apart
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Voltage at max power
41.27 V
42.34 V
1.07 V apart
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
STP730S-D66-Nsh+
24,493 kWh
STP-NT11/66QGDF-670
22,655 kWh
Lifetime gap
1,838 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
STP730S-D66-Nsh+
STP-NT11/66QGDF-670
Standard test conditions
25 °C
100.0% of rated power
730 W
670 W
Cool, bright day
40 °C
95.8% of rated power
699 W
644 W
Typical summer roof
55 °C
91.6% of rated power
669 W
618 W
Hot roof
70 °C
87.4% of rated power
638 W
592 W
03
Full specification
Parameter
STP730S-D66-Nsh+
STP-NT11/66QGDF-670
Difference
Power and efficiency
Rated power
730 Wp
670 Wp
+60 W for STP730S-D66-Nsh+
Module efficiency
23.50 %
24.80 %
+1.30 pp for STP-NT11/66QGDF-670
Power density
235.0 Wp/m²
248.0 Wp/m²
+13.0 Wp/m² for STP-NT11/66QGDF-670
Open-circuit voltage
49.66 V
50.60 V
Effectively the same
Voltage at max power
41.27 V
42.34 V
1.07 V apart
Short-circuit current
18.54 A
16.64 A
1.90 A apart
Current at max power
17.70 A
15.84 A
1.86 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.260 %/°C
+0.020 %/°C for STP-NT11/66QGDF-670
Mechanical
Dimensions
2384x1303x33 mm
2382x1134x30 mm
2384x1303x33 mm vs 2382x1134x30 mm
Module area
3.106 m²
2.701 m²
0.405 m² apart
Weight
37.5 kg
33.1 kg
-4.4 kg for STP-NT11/66QGDF-670
Weight per kWp
51.4 kg/kWp
49.4 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
0.35 %/yr
-0.05 %/yr for STP-NT11/66QGDF-670
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
264
132 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#716
vs
#12
STP-NT11/66QGDF-670 leads by 704 places
Power density
#800
vs
#14
STP-NT11/66QGDF-670 leads by 786 places
Heat behaviour
#1,309
vs
#511
STP-NT11/66QGDF-670 leads by 798 places
Weight
#4,748
vs
#2,907
STP-NT11/66QGDF-670 leads by 1,841 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#196
vs
#302
STP730S-D66-Nsh+ leads by 106 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 STP-NT11/66QGDF-670?
According to our database: Suntech STP-NT11/66QGDF-670 has higher module efficiency (24.80% vs 23.50%); Suntech STP-NT11/66QGDF-670 tolerates heat better (temp coeff -0.260%/°C vs -0.280%/°C). 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 STP-NT11/66QGDF-670?
Suntech STP730S-D66-Nsh+ has a module efficiency of 23.50%, while Suntech STP-NT11/66QGDF-670 is 24.80%. 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 STP-NT11/66QGDF-670?
Suntech STP730S-D66-Nsh+ uses TOPCon cells; Suntech STP-NT11/66QGDF-670 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 STP-NT11/66QGDF-670?
Suntech STP730S-D66-Nsh+ has a 30 years power warranty; Suntech STP-NT11/66QGDF-670 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 STP-NT11/66QGDF-670 bifacial panels?
Both Suntech STP730S-D66-Nsh+ and Suntech STP-NT11/66QGDF-670 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 31 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.