Suntech STP705S-D66-Nsh+ vs Suntech STP510S-H54-Nkh+
VS
The verdict
STP510S-H54-Nkh+ leads on the differences that matter
The largest is rated power: 195 W more power. 6 of 19 comparable parameters are identical.
See all 13 differencesHow alike are they
6
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
13 of 19 parameters
What actually differs
Parameter
STP705S-D66-Nsh+
STP510S-H54-Nkh+
Difference
Rated power
705 Wp
510 Wp
195 W more power
Weight
38.5 kg
23.5 kg
15.0 kg lighter
Weight per kWp
54.6 kg/kWp
46.1 kg/kWp
8.5 kg/kWp lighter
Product warranty
12 yrs
25 yrs
13 yrs longer
Open-circuit voltage
48.57 V
40.72 V
7.85 V apart
Short-circuit current
18.43 A
15.73 A
2.70 A apart
Module area
3.106 m²
2.224 m²
0.883 m² apart
Module efficiency
22.70 %
22.90 %
0.20 pp more efficient
Voltage at max power
40.31 V
34.39 V
5.92 V apart
Current at max power
17.49 A
14.83 A
2.66 A apart
Cell count
132
108
24 cells apart
Bifacial
Yes
No
Yes vs No
Dimensions
2384x1303x33 mm
1961x1134x30 mm
2384x1303x33 mm vs 1961x1134x30 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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
STP705S-D66-Nsh+
23,654 kWh
STP510S-H54-Nkh+
17,112 kWh
Lifetime gap
6,542 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
STP705S-D66-Nsh+
STP510S-H54-Nkh+
Standard test conditions
25 °C
100.0% of rated power
705 W
510 W
Cool, bright day
40 °C
95.7% of rated power
674 W
488 W
Typical summer roof
55 °C
91.3% of rated power
644 W
466 W
Hot roof
70 °C
87.0% of rated power
613 W
443 W
03
Full specification
Parameter
STP705S-D66-Nsh+
STP510S-H54-Nkh+
Difference
Power and efficiency
Rated power
705 Wp
510 Wp
+195 W for STP705S-D66-Nsh+
Module efficiency
22.70 %
22.90 %
+0.20 pp for STP510S-H54-Nkh+
Power density
227.0 Wp/m²
229.3 Wp/m²
Effectively the same
Open-circuit voltage
48.57 V
40.72 V
7.85 V apart
Voltage at max power
40.31 V
34.39 V
5.92 V apart
Short-circuit current
18.43 A
15.73 A
2.70 A apart
Current at max power
17.49 A
14.83 A
2.66 A apart
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
1961x1134x30 mm
2384x1303x33 mm vs 1961x1134x30 mm
Module area
3.106 m²
2.224 m²
0.883 m² apart
Weight
38.5 kg
23.5 kg
-15.0 kg for STP510S-H54-Nkh+
Weight per kWp
54.6 kg/kWp
46.1 kg/kWp
-8.5 kg/kWp for STP510S-H54-Nkh+
Warranty and degradation
Product warranty
12 yrs
25 yrs
+13 yrs for STP510S-H54-Nkh+
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
108
24 cells apart
Bifacial
Yes
No
Yes vs No
04
14,129 panels
Against the whole database
Efficiency
#3,364
vs
#2,412
STP510S-H54-Nkh+ leads by 952 places
Power density
#3,418
vs
#2,397
STP510S-H54-Nkh+ leads by 1,021 places
Heat behaviour
#2,220
vs
#2,220
Tied - the same position in the database
Weight
#9,041
vs
#979
STP510S-H54-Nkh+ leads by 8,062 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,052
vs
#3,646
STP705S-D66-Nsh+ leads by 2,594 places
05
Open the full database
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The same specification on paper
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Suntech STP705S-D66-Nsh+ or Suntech STP510S-H54-Nkh+?
According to our database: Suntech STP510S-H54-Nkh+ has higher module efficiency (22.90% vs 22.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Suntech STP705S-D66-Nsh+ and Suntech STP510S-H54-Nkh+?
Suntech STP705S-D66-Nsh+ has a module efficiency of 22.70%, while Suntech STP510S-H54-Nkh+ is 22.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Suntech STP705S-D66-Nsh+ use vs Suntech STP510S-H54-Nkh+?
Suntech STP705S-D66-Nsh+ uses TOPCon cells; Suntech STP510S-H54-Nkh+ 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 STP705S-D66-Nsh+ and Suntech STP510S-H54-Nkh+?
Suntech STP705S-D66-Nsh+ has a 30 years power warranty; Suntech STP510S-H54-Nkh+ 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 STP705S-D66-Nsh+ and Suntech STP510S-H54-Nkh+ bifacial panels?
Suntech STP705S-D66-Nsh+ is bifacial (captures light from both faces); Suntech STP510S-H54-Nkh+ is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Shop prices: See 16 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.