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STP725S-D66-Nsh+ vs STP705S-D66-Nsh+ 12 of 19 identical Swap Change panels

Suntech STP725S-D66-Nsh+ vs Suntech STP705S-D66-Nsh+

Suntech STP725S-D66-Nsh+
STP725S-D66-Nsh+
725 Wp 23.30 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Suntech STP705S-D66-Nsh+
STP705S-D66-Nsh+
705 Wp 22.70 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

STP725S-D66-Nsh+ leads on the differences that matter

The largest is module efficiency: 0.60 pp more efficient. 12 of 19 comparable parameters are identical.

See all 7 differences
How alike are they
12 of 19 comparable
parameters are identical
identical differs
01

What actually differs

7 of 19 parameters
Parameter STP725S-D66-Nsh+ STP705S-D66-Nsh+ Difference
Module efficiency 23.30 % 22.70 % 0.60 pp more efficient
Product warranty 15 yrs 12 yrs 3 yrs longer
Power density 233.4 Wp/m² 227.0 Wp/m² 6.4 Wp/m² higher
Rated power 725 Wp 705 Wp 20 W more power
Temperature coefficient -0.280 %/°C -0.290 %/°C 0.010 %/°C better in heat
Weight per kWp 51.7 kg/kWp 54.6 kg/kWp 2.9 kg/kWp lighter
Weight 37.5 kg 38.5 kg 1.0 kg lighter
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
STP725S-D66-Nsh+
24,325 kWh
STP705S-D66-Nsh+
23,654 kWh
Lifetime gap
671 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario STP725S-D66-Nsh+ STP705S-D66-Nsh+
Standard test conditions 25 °C 100.0% of rated power 725 W 705 W
Cool, bright day 40 °C 95.7% of rated power 695 W 674 W
Typical summer roof 55 °C 91.3% of rated power 664 W 644 W
Hot roof 70 °C 87.0% of rated power 634 W 613 W
03

Full specification

Parameter STP725S-D66-Nsh+ STP705S-D66-Nsh+ Difference
Power and efficiency
Rated power 725 Wp 705 Wp +20 W for STP725S-D66-Nsh+
Module efficiency 23.30 % 22.70 % +0.60 pp for STP725S-D66-Nsh+
Power density 233.4 Wp/m² 227.0 Wp/m² +6.4 Wp/m² for STP725S-D66-Nsh+
Open-circuit voltage 49.46 V 48.57 V Effectively the same
Voltage at max power 41.07 V 40.31 V Effectively the same
Short-circuit current 18.50 A 18.43 A Effectively the same
Current at max power 17.66 A 17.49 A Effectively the same
Temperature
Temperature coefficient -0.280 %/°C -0.290 %/°C +0.010 %/°C for STP725S-D66-Nsh+
Mechanical
Dimensions 2384x1303x33 mm 2384x1303x33 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 37.5 kg 38.5 kg -1.0 kg for STP725S-D66-Nsh+
Weight per kWp 51.7 kg/kWp 54.6 kg/kWp -2.9 kg/kWp for STP725S-D66-Nsh+
Warranty and degradation
Product warranty 15 yrs 12 yrs +3 yrs for STP725S-D66-Nsh+
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

Against the whole database

14,005 panels
Efficiency
#1,017 vs #3,307
STP725S-D66-Nsh+ leads by 2,290 places
Power density
#936 vs #3,361
STP725S-D66-Nsh+ leads by 2,425 places
Heat behaviour
#1,309 vs #2,165
STP725S-D66-Nsh+ leads by 856 places
Weight
#5,085 vs #8,959
STP725S-D66-Nsh+ leads by 3,874 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#263 vs #1,037
STP725S-D66-Nsh+ leads by 774 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Suntech STP725S-D66-Nsh+ or Suntech STP705S-D66-Nsh+?
According to our database: Suntech STP725S-D66-Nsh+ has higher module efficiency (23.30% vs 22.70%); Suntech STP725S-D66-Nsh+ tolerates heat better (temp coeff -0.280%/°C vs -0.290%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Suntech STP725S-D66-Nsh+ and Suntech STP705S-D66-Nsh+?
Suntech STP725S-D66-Nsh+ has a module efficiency of 23.30%, while Suntech STP705S-D66-Nsh+ is 22.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Suntech STP725S-D66-Nsh+ use vs Suntech STP705S-D66-Nsh+?
Suntech STP725S-D66-Nsh+ uses TOPCon cells; Suntech STP705S-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 STP725S-D66-Nsh+ and Suntech STP705S-D66-Nsh+?
Suntech STP725S-D66-Nsh+ has a 30 years power warranty; Suntech STP705S-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 STP725S-D66-Nsh+ and Suntech STP705S-D66-Nsh+ bifacial panels?
Both Suntech STP725S-D66-Nsh+ and Suntech STP705S-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.