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Suntech STP425S-C54/Nshb
Suntech Brand review

STP425S-C54/Nshb

425 Wp TOPCon
ComparePV verdict

Solid all-round for its segment

Rank 7,996 of 14,129
Compare panels Datasheet PDF
Power (Wp)
425
Typical for its class
Efficiency (%)
21.80
Typical · median 22.00%
Density (Wp/m²)
217.6
Typical · median 220.2
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
21.0
Typical · median 22.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

Suntech Ultra V Pro Mini series (Full-black monofacial single-glass module) was designed for maximum yield from every square meter of roof - especially where aesthetics and easy installation matter. The full-black version provides a seamless, elegant appearance, making the panels blend well with modern roofing materials and premium installations. The use of N-type TOPCon cells helps minimize typical power losses over time and improves performance in less favorable lighting conditions, translating to more stable energy production throughout the year.

This is a monofacial single-glass module - the choice for investors who want to maintain a classic structure while benefiting from modern cell technology. The refined "mini" format facilitates optimal module layout on complex roof sections, near chimneys, or around window frames, minimizing surface losses. An additional advantage is its high mechanical strength, crucial for handling wind and snow loads. This series is suitable for residential and commercial installations where performance, appearance, and trouble-free operation are key.

Ranking

1,220 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.80% 22.00% Typical 7,085
Power density 217.6 220.2 Typical 7,235
Temperature coefficient -0.290 -0.290 Typical 2,220
Weight per kWp 49.4 51.5 Typical 2,916
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 · 0 caution
Best for

Residential and commercial.

Notes from the database
  • Efficiency of 21.8% matches the TOPCon 400-450W median
  • Power density of 217.6 W/m² matches the TOPCon 400-450W median
  • At -0.29%/°C, hot weather performance is typical for TOPCon 400-450W panels
  • Weight of 21.0 kg is typical for TOPCon 400-450W panels
  • #7085 for efficiency, #2220 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 425 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.80 % Typical Segment median 22.00%
Vmpp · Impp 32.15 V · 13.22 A Operating point at max power
Voc · Isc 38.59 V · 14.17 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 21.0 kg Typical Typical · median 22.0 kg
Cells 108 · TOPCon Monocrystalline
Coefficient Pmax -0.290 %/°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 25 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 371 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

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
-

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
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Suntech STP425S-C54/Nshb 425 W 21.80% -0.290 21.0 kg You are here
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +50 W, +2.2 pp, +10 yr warranty
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +40 W, hotter, +2.0 pp
JAT54S40-475/LR 475 W 23.80% -0.260 19.3 kg +50 W, cooler, +2.0 pp
TWMNH-48HW475 475 W 23.80% -0.280 23.7 kg +50 W, heavier, +2.0 pp
CHSM48RN(DG)/F-BH-475 475 W 23.80% -0.290 24.5 kg +50 W, heavier, +2.0 pp
AIKO-A475-MCE54Mw 475 W 23.80% -0.260 21.0 kg +50 W, cooler, +2.0 pp
AIKO-A475-MAH54Mw 475 W 23.80% -0.260 21.5 kg +50 W, cooler, +2.0 pp
STP390S-C54/Umh 390 W 19.90% -0.360 22.1 kg Hotter, -1.9 pp, -5 yr warranty
STP395S-C54/Umhm 395 W 20.20% -0.340 21.0 kg Hotter, -1.6 pp, -5 yr warranty
STP395S-C54/Umh 395 W 20.20% -0.360 22.1 kg Hotter, -1.6 pp, -5 yr warranty
STP400S-C54/Umhm 400 W 20.50% -0.340 21.0 kg Hotter, -1.3 pp, -5 yr warranty
STP400S-C54/Umh 400 W 20.50% -0.360 22.1 kg Hotter, -1.3 pp, -5 yr warranty
STP405S-C54/Umhm 405 W 20.70% -0.340 21.0 kg Hotter, -1.1 pp, -5 yr warranty
STP405S-C54/Umh 405 W 20.70% -0.360 22.1 kg Hotter, -1.1 pp, -5 yr warranty
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +85 W, cooler, +3.2 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +70 W, cooler, +3.0 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 V Pro mini (Full-black single glass monofacial module) series

6 answered

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

What is the maximum power output of the Suntech Ultra V Pro mini panels?
The Ultra V Pro mini series reaches up to 445 Wp. Thanks to N-type TOPCon cells, the module maintains high efficiency despite its compact mini format, making it a good choice for roofs with limited space where maximizing yield per square meter matters most.
What warranty comes with the Suntech Ultra V Pro mini panels?
The manufacturer offers a 25-year product warranty and a 30-year linear power output warranty. This provides long-term protection for the investment and guarantees gradually declining but still high module performance even after three decades of operation.
Are the Suntech Ultra V Pro mini panels suitable for complex roof shapes?
Yes, the mini format together with the uniform, elegant full-black design makes these panels well-suited for roofs with dormers, chimneys, or irregular sections. The smaller dimensions allow for optimal panel layout and minimize wasted roof area compared to standard, larger modules.
What is N-type TOPCon technology and how does it differ from classic PERC cells?
TOPCon is an N-type cell technology that reduces power loss from degradation over time and improves performance under lower irradiance, compared to older P-type PERC cells. In practice, this results in more stable energy production throughout the year and better panel longevity.
Is the Suntech Ultra V Pro mini a bifacial panel?
No, the Ultra V Pro mini series is a monofacial single glass module that generates energy only from the front side. This is a solid choice for investors who prefer a classic, proven single-glass construction while still benefiting from modern TOPCon cell technology.
Is Suntech a reliable manufacturer of solar panels?
Yes, Suntech is a Tier 1 manufacturer headquartered in China, with a long-established presence in the global PV market. Tier 1 status reflects financial stability and reliability, which is particularly relevant when considering long-term product and power warranties.
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