Skip to main content
Suntech STP705S-D66-Nsh+
Suntech Brand review

STP705S-D66-Nsh+

705 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 1,037 of 14,005
Compare panels Datasheet PDF
Power (Wp)
705
Weak · bottom 22%
Efficiency (%)
22.70
Weak · bottom 23%
Density (Wp/m²)
227.0
Weak · bottom 21%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
38.5
Weak · bottom 7%
Warranty (yrs)
30
Typical · median 30 yrs

Ultra T 2.0 is a PV module series built for investors who care about more than just efficiency, valuing the visual appeal of an installation on a roof or facade just as much. The N-type TOPCon technology in a half-cell layout reduces resistive losses and keeps energy output stable even under elevated module operating temperatures. The distinctive, uniformly black appearance of the components allows the panels to blend harmoniously into building architecture, making this series a natural choice for residential projects where aesthetics matter as much as technical parameters. A double-glass construction with an anti-reflective coated front glass, combined with multi-busbar technology, improves light utilization and current collection, translating into greater long-term reliability. The series also stands out for its resistance to demanding environmental conditions, backed by certifications for salt mist, ammonia, and dust and sand resistance, making it a solid choice for agricultural and coastal sites. A durable anodized aluminum frame together with certified load-bearing capability ensures mechanical stability even in regions with heavy snow and wind loads, while the long-term power warranty provides confidence in the investment for decades to come.

Ranking

420 panels in the segment TOPCon 700-750 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.70% 23.00% Weak · bottom 23% 3,307
Power density 227.0 230.2 Weak · bottom 21% 3,361
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 54.6 52.9 Weak · bottom 7% 8,959
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 3 caution
Best for

Commercial and utility-scale.

Not ideal for

Weight-limited structures, roofs where every square metre has to count and tight roof space.

Watch-outs
54.6 kg per kWp

Bottom 7% of the TOPCon 700-750 W segment, against a median of 52.9. Ranked 8,959th in the whole database.

227.0 watts per square metre

Bottom 21% of the TOPCon 700-750 W segment, against a median of 230.2.

22.70% module efficiency

Bottom 23% of the TOPCon 700-750 W segment, against a median of 23.00%.

Notes from the database
  • At 22.7% efficiency, this panel is on par with typical TOPCon 700-750W modules
  • Power density of 226.9 W/m² is 3.2 W/m² below TOPCon 700-750W median (230.2 W/m²) - needs more roof space
  • At -0.29%/°C, hot weather performance is typical for TOPCon 700-750W panels
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
  • Ranked #3307 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 705 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.70 % Weak Segment median 23.00%
Vmpp · Impp 40.31 V · 17.49 A Operating point at max power
Voc · Isc 48.57 V · 18.43 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×33 mm · 3.11 m² of roof
Weight 38.5 kg Weak Weak · bottom 7%
Cells 132 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 616 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Suntech in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 705 Wp appear here. The rest cover the whole series.

Current-Voltage (I-V) Characteristic Curves Current-Voltage (I-V) Characteristic Curves Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.290 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Suntech STP705S-D66-Nsh+ 705 W 22.70% -0.290 38.5 kg You are here
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, lighter, +2.5 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg -30 W, lighter, +2.3 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg Cooler, lighter, +2.3 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg Cooler, lighter, +2.2 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg -35 W, lighter, +2.1 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg -35 W, lighter, +2.1 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg -35 W, lighter, +2.1 pp
STP650S-D66/Pmh+ 650 W 20.90% -0.340 37.5 kg -55 W, hotter, -1.8 pp
STP655S-D66/Wmh 655 W 21.10% -0.340 33.5 kg -50 W, hotter, -1.6 pp
STP660S-D66/Wmh 660 W 21.20% -0.340 33.5 kg Hotter, lighter, -1.5 pp
STP665S-D66/Wmh 665 W 21.40% -0.340 33.5 kg Hotter, lighter, -1.3 pp
STP670S-D66/Wmh 670 W 21.60% -0.340 33.5 kg Hotter, lighter, -1.1 pp
STP675S-D66/Wmh 675 W 21.70% -0.340 33.5 kg Hotter, lighter, -1.0 pp
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +100 W, cooler, +2.4 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +95 W, cooler, +2.2 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +90 W, cooler, +2.1 pp

Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the maximum power output of the Suntech Ultra T 2.0 panel?
The Ultra T 2.0 series reaches a maximum power output of up to 735 Wp, placing it among the highest-output monocrystalline modules currently available. This high output comes from large-format half-cut TOPCon cells combined with multi-busbar technology, which reduce current losses and improve energy harvesting across the panel surface. As a result, fewer modules are needed to reach a given system size, lowering mounting and racking costs.
How does the N-type TOPCon technology in the Ultra T 2.0 differ from older PERC panels?
TOPCon is an N-type cell technology that, unlike common PERC cells, is not boron-doped, so Ultra T 2.0 panels experience virtually no LID-related power loss in the first months of operation. A lower temperature coefficient (around -0.29%/°C) means smaller output drops on hot days compared to standard PERC modules. In practice, this results in higher and more stable annual energy yield.
Do Ultra T 2.0 panels perform well in summer, at high roof temperatures?
Yes, thanks to TOPCon technology, Ultra T 2.0 panels have a low power temperature coefficient (around -0.29%/°C), meaning they lose less output than standard PERC panels as module temperature rises above 25°C. This matters especially in summer, when roof surface temperatures can exceed 60-70°C. As a result, the system maintains higher energy output on the hottest days, when demand for electricity is typically highest.
What warranty comes with the Suntech Ultra T 2.0 panels?
The manufacturer provides a 25-year product warranty along with a 30-year linear power output warranty. This means that after 30 years of operation, the panel should still generate no less than about 87% of its original rated power, with less than 1% degradation in the first year alone. This long warranty period makes the Ultra T 2.0 a solid choice for investors planning installations designed to last for decades without module replacement.
Are Ultra T 2.0 panels suitable for coastal installations or agricultural buildings?
Yes, the Ultra T 2.0 series holds certifications for salt mist, ammonia, and dust/sand resistance, confirming its durability under harsh environmental conditions. Salt mist resistance is essential for coastal installations, where salty air accelerates component corrosion, while ammonia resistance matters for installations on livestock buildings and other agricultural sites. This makes the panels a safe choice for both types of applications.
Can Ultra T 2.0 panels withstand heavy snow and strong wind loads?
Yes, Ultra T 2.0 modules feature a sturdy anodized aluminum frame with certified load ratings, confirming their mechanical stability under strong wind and heavy snow loads. The double-glass construction further increases panel rigidity and resistance to deflection compared to standard backsheet modules. These parameters matter when designing installations in mountainous regions or areas with high snow load standards, where choosing the right mounting structure is critical.
Add to compare