Skip to main content
Suntech STP445S-C54/Nshtb+
Suntech Brand review

STP445S-C54/Nshtb+

445 Wp TOPCon Bifacial 80%
ComparePV verdict

Space saver, no clear weak spot

Rank 8,934 of 14,129
Compare panels Datasheet PDF
Power (Wp)
445
Strong · top 8%
Efficiency (%)
22.79
Strong · top 3%
Density (Wp/m²)
227.9
Strong · top 2%
Temp (%/°C)
-0.300
Typical · median -0.290
Weight (kg)
21.5
Strong · top 24%
Warranty (yrs)
30
Typical · median 30 yrs

The Ultra T 1.0 series brings together N-type TOPCon cells and half-cut cell technology, reducing resistive losses and improving performance stability under demanding irradiance conditions. Built as a framed, double-glass bifacial module, it offers strong mechanical rigidity and resistance to snow and wind loads, making it a solid choice for commercial and industrial installations where long-term durability matters most. Thanks to multi busbar technology, the panels make better use of incoming light and collect current more efficiently, boosting the reliability of the entire string. The use of bifacial cells allows the module to capture additional light reflected from the ground, increasing energy yield without expanding the installation footprint - a real advantage wherever roof or ground space is limited. A zero-LID design combined with ultra-low LeTID degradation keeps power loss to a minimum in the early years of operation, while strong PID resistance reduces the risk of losses caused by electrical stress within the module. The Ultra T 1.0 series suits investors looking for a balance between performance, durability, and a lower LCOE across the full lifecycle of the installation.

Ranking

1,220 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.79% 22.00% Strong · top 3% 3,061
Power density 227.9 220.2 Strong · top 2% 2,845
Temperature coefficient -0.300 -0.290 Typical 6,152
Weight per kWp 48.3 51.5 Strong · top 24% 2,196
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

3 positive · 0 caution
Best for

Commercial, utility-scale and shaded-installations.

Strengths
227.9 watts per square metre

Top 2% of the TOPCon 400-450 W segment, against a median of 220.2. Ranked 2,845th in the whole database.

22.79% module efficiency

Top 3% of the TOPCon 400-450 W segment, against a median of 22.00%. Ranked 3,061st in the whole database.

48.3 kg per kWp

Top 24% of the TOPCon 400-450 W segment, against a median of 51.5.

Notes from the database
  • 22.8% module efficiency - 0.8pp better than the TOPCon 400-450W median of 22.0%
  • At 227.9 W/m² power density, this panel generates 7.7 W/m² more per unit area than TOPCon 400-450W median (220.2 W/m²)
  • At -0.30%/°C, hot weather performance is typical for TOPCon 400-450W panels
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface
  • Ranked #3061 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 445 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.79 % Strong Segment median 22.00%
Vmpp · Impp 32.90 V · 13.53 A Operating point at max power
Voc · Isc 39.50 V · 14.24 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 21.5 kg Strong Strong · top 24%
Cells 108 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.046 %/°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 389 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 445 Wp appear here. The rest cover the whole series.

Power Degradation over 30 Years Power Degradation over 30 Years 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
-0.300 %/°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 STP445S-C54/Nshtb+ 445 W 22.79% -0.300 21.5 kg You are here
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +50 W, cooler, +2.0 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +45 W, cooler, +1.7 pp
STP-NT11/48QGSF-490 490 W 24.50% -0.260 21.5 kg +45 W, cooler, +1.7 pp
JAT54S40-485/LR 485 W 24.30% -0.260 19.3 kg +40 W, cooler, +1.5 pp
AIKO-A485-MCE54Mw 485 W 24.30% -0.260 21.0 kg +40 W, cooler, +1.5 pp
LR7-54HJD-495M 495 W 24.30% -0.240 23.5 kg +50 W, cooler, +1.5 pp
AIKO-A485-MAH54Mw 485 W 24.30% -0.260 21.5 kg +40 W, cooler, +1.5 pp
STP390S-C54/Umh 390 W 19.90% -0.360 22.1 kg -55 W, hotter, -2.9 pp
STP395S-C54/Umhm 395 W 20.20% -0.340 21.0 kg -50 W, -2.6 pp, -5 yr warranty
STP395S-C54/Umh 395 W 20.20% -0.360 22.1 kg -50 W, hotter, -2.6 pp
STP400S-C54/Umhm 400 W 20.50% -0.340 21.0 kg -45 W, -2.3 pp, -5 yr warranty
STP400S-C54/Umh 400 W 20.50% -0.360 22.1 kg Hotter, -2.3 pp, -5 yr warranty
STP405S-C54/Umhm 405 W 20.70% -0.340 21.0 kg Hotter, -2.1 pp, -5 yr warranty
STP405S-C54/Umh 405 W 20.70% -0.360 22.1 kg Hotter, -2.1 pp, -5 yr warranty
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +65 W, cooler, +2.2 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +60 W, cooler, +1.9 pp

Found 1797 panels of the same or similar size to this one, within ±10 mm. See them here Found 1928 panels of the same or similar size to this one, within ±25 mm. See them here Found 3413 panels of the same or similar size to this one, within ±50 mm. See them here Found 4007 panels of the same or similar size to this one, within ±100 mm. See them here

About the Ultra T 1.0 series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What makes the Suntech Ultra T 1.0 series different from standard PERC panels?
Ultra T 1.0 uses N-type TOPCon half-cut cells, which are more efficient and less prone to degradation than conventional PERC cells. This results in higher conversion efficiency, better performance at high temperatures and in low-light conditions, and a maximum power output of up to 600 Wp - meaning fewer panels are needed to reach the same system capacity.
Are Suntech Ultra T 1.0 panels bifacial, and how much extra energy can they generate?
Yes, Ultra T 1.0 modules are bifacial in a double-glass construction, meaning the rear side also generates power from reflected light. Depending on the ground surface (light gravel, white EPDM roofing, etc.), this can add anywhere from a few to over ten percent more energy yield without increasing the installation footprint, making it especially cost-effective for ground-mount and flat-roof commercial projects.
What warranty comes with the Suntech Ultra T 1.0 series?
The Ultra T 1.0 series is backed by a 15-year product warranty and a 30-year linear power warranty. This means the module is guaranteed to retain a significant share of its rated output even after three decades of operation, backed by Suntech's status as a tier 1 manufacturer headquartered in China with established service and replacement support.
Does the multi busbar technology in the Ultra T 1.0 actually improve performance?
Yes, a denser busbar grid distributes current more evenly across the cell surface and reduces resistive losses, particularly in cases of micro-cracks or partial shading. In practice, this translates into higher and more consistent energy output over the module's lifetime, not just improved figures under standard STC test conditions.
Are Suntech Ultra T 1.0 panels suitable for industrial and utility-scale solar farms?
Yes, the double-glass framed construction provides high structural rigidity and strong resistance to snow and wind loads, which matters on large industrial rooftops and ground-mount installations. The high per-module power output (up to 600 Wp) combined with bifacial technology also lowers the cost per watt, improving the economics of commercial and utility-scale projects.
Do Ultra T 1.0 panels lose power in their first years of operation due to LID?
Not to a meaningful degree - the N-type TOPCon cells used in the Ultra T 1.0 series feature zero LID effect and very low LeTID degradation, resulting in minimal power loss in the first year. High PID resistance further limits losses from potential-induced degradation, allowing the panel to maintain stable performance over many years of service.
Add to compare