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STP735S-D66-Nsh+ vs STP445S-B72/Vnh 3 of 18 identical Swap Change panels

Suntech STP735S-D66-Nsh+ vs Suntech STP445S-B72/Vnh

Suntech STP735S-D66-Nsh+
STP735S-D66-Nsh+
735 Wp 23.70 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Suntech STP445S-B72/Vnh
STP445S-B72/Vnh
445 Wp 20.40 %
Open panel page Datasheet PDF
The verdict

STP735S-D66-Nsh+ leads on the differences that matter

The largest is module efficiency: 3.30 pp more efficient. 3 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 15 differences
How alike are they
3 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

15 of 18 parameters
Parameter STP735S-D66-Nsh+ STP445S-B72/Vnh Difference
Module efficiency 23.70 % 20.40 % 3.30 pp more efficient
Temperature coefficient -0.280 %/°C -0.360 %/°C 0.080 %/°C better in heat
Rated power 735 Wp 445 Wp 290 W more power
Power density 236.6 Wp/m² 204.4 Wp/m² 32.2 Wp/m² higher
Performance warranty 30 yrs 25 yrs 5 yrs longer
Annual degradation 0.40 %/yr 0.55 %/yr 0.15 %/yr slower
Weight 37.5 kg 24.5 kg 13.0 kg lighter
Product warranty 15 yrs 12 yrs 3 yrs longer
Short-circuit current 18.58 A 11.54 A 7.04 A apart
Module area 3.106 m² 2.177 m² 0.930 m² apart
Weight per kWp 51.0 kg/kWp 55.1 kg/kWp 4.0 kg/kWp lighter
Current at max power 17.74 A 10.81 A 6.93 A apart
Cell count 132 144 12 cells apart
Bifacial Yes No Yes vs No
Dimensions 2384x1303x33 mm 2095x1039x35 mm 2384x1303x33 mm vs 2095x1039x35 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
STP735S-D66-Nsh+
24,661 kWh
STP445S-B72/Vnh
14,422 kWh
Lifetime gap
10,239 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario STP735S-D66-Nsh+ STP445S-B72/Vnh
Standard test conditions 25 °C 100.0% of rated power 735 W 445 W
Cool, bright day 40 °C 94.6% of rated power 704 W 421 W
Typical summer roof 55 °C 89.2% of rated power 673 W 397 W
Hot roof 70 °C 83.8% of rated power 642 W 373 W
03

Full specification

Parameter STP735S-D66-Nsh+ STP445S-B72/Vnh Difference
Power and efficiency
Rated power 735 Wp 445 Wp +290 W for STP735S-D66-Nsh+
Module efficiency 23.70 % 20.40 % +3.30 pp for STP735S-D66-Nsh+
Power density 236.6 Wp/m² 204.4 Wp/m² +32.2 Wp/m² for STP735S-D66-Nsh+
Open-circuit voltage 49.86 V 49.00 V Effectively the same
Voltage at max power 41.47 V 41.20 V Effectively the same
Short-circuit current 18.58 A 11.54 A 7.04 A apart
Current at max power 17.74 A 10.81 A 6.93 A apart
Temperature
Temperature coefficient -0.280 %/°C -0.360 %/°C +0.080 %/°C for STP735S-D66-Nsh+
Mechanical
Dimensions 2384x1303x33 mm 2095x1039x35 mm 2384x1303x33 mm vs 2095x1039x35 mm
Module area 3.106 m² 2.177 m² 0.930 m² apart
Weight 37.5 kg 24.5 kg -13.0 kg for STP445S-B72/Vnh
Weight per kWp 51.0 kg/kWp 55.1 kg/kWp -4.0 kg/kWp for STP735S-D66-Nsh+
Warranty and degradation
Product warranty 15 yrs 12 yrs +3 yrs for STP735S-D66-Nsh+
Performance warranty 30 yrs 25 yrs +5 yrs for STP735S-D66-Nsh+
Annual degradation 0.40 %/yr 0.55 %/yr -0.15 %/yr for STP735S-D66-Nsh+
Technology
Cell technology TOPCon - Not published by Suntech
Cell type Monocrystalline Monocrystalline Same
Cell count 132 144 12 cells apart
Bifacial Yes No Yes vs No
04

Against the whole database

14,129 panels
Efficiency
#549 vs #11,680
STP735S-D66-Nsh+ leads by 11,131 places
Power density
#614 vs #11,609
STP735S-D66-Nsh+ leads by 10,995 places
Heat behaviour
#1,347 vs #12,425
STP735S-D66-Nsh+ leads by 11,078 places
Weight
#4,383 vs #9,519
STP735S-D66-Nsh+ leads by 5,136 places
Warranty
#21 vs #9,912
STP735S-D66-Nsh+ leads by 9,891 places
Overall
#155 vs #11,533
STP735S-D66-Nsh+ leads by 11,378 places
05

More useful comparisons

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06

Written summary

07

Questions about this pairing

Which panel is better: Suntech STP735S-D66-Nsh+ or Suntech STP445S-B72/Vnh?
According to our database: Suntech STP735S-D66-Nsh+ has higher module efficiency (23.70% vs 20.40%); Suntech STP735S-D66-Nsh+ tolerates heat better (temp coeff -0.280%/°C vs -0.360%/°C). 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 STP445S-B72/Vnh?
Suntech STP735S-D66-Nsh+ has a module efficiency of 23.70%, while Suntech STP445S-B72/Vnh is 20.40%. 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 STP445S-B72/Vnh?
Suntech STP735S-D66-Nsh+ uses TOPCon cells; Suntech STP445S-B72/Vnh uses Monocrystalline. 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 STP445S-B72/Vnh?
Suntech STP735S-D66-Nsh+ has a 30 years power warranty; Suntech STP445S-B72/Vnh has a 25 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 STP445S-B72/Vnh bifacial panels?
Suntech STP735S-D66-Nsh+ is bifacial (captures light from both faces); Suntech STP445S-B72/Vnh 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.