Skip to main content
Suntech STP375S-B60/Wnhb
Suntech Brand review

STP375S-B60/Wnhb

375 Wp Monocrystalline
ComparePV verdict

Middle of its segment, weak in heat

Rank 12,442 of 14,129
Compare panels Datasheet PDF
Power (Wp)
375
Weak · bottom 18%
Efficiency (%)
20.60
Typical · median 21.10%
Density (Wp/m²)
205.5
Typical · median 211.0
Temp (%/°C)
-0.360
Weak · bottom 14%
Weight (kg)
20.3
Typical · median 22.0 kg
Warranty (yrs)
25
Weak · bottom 20%

The Ultra S mini series from Suntech consists of compact monocrystalline modules designed for installations where every square meter of roof space counts - the smaller footprint lets you fit more panels into limited areas without sacrificing power output. The panels use half-cut cell technology, splitting cells in half to reduce resistive losses and improve resistance to microcracks and partial shading. Suntech's current sorting process minimizes losses caused by current mismatch between cells, translating into higher overall system yield. The modules also deliver excellent low-light performance, generating more energy on cloudy days, in the morning, and at dusk - a real advantage in climates with variable sunlight. A lower operating temperature and favorable power temperature coefficient help maintain steadier output during hot summer months. The design has passed extended wind and snow load testing, and the IP68-rated junction box ensures reliable sealing in demanding environments - coastal areas, farms, or regions with high humidity. A long 25-year linear warranty makes this series a solid choice for both residential installations and smaller commercial projects where reliability on limited available space is the priority.

Ranking

5,861 panels in the 275-475 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 20.60% 21.10% Typical 11,172
Power density 205.5 211.0 Typical 11,261
Temperature coefficient -0.360 -0.310 Weak · bottom 14% 12,425
Weight per kWp 54.1 53.6 Typical 8,431
Performance warranty 25 yrs 30 yrs Weak · bottom 20% 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 2 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Hot climates and owners who want a long output guarantee.

Watch-outs
-0.360 %/°C temperature coefficient

Bottom 14% of the 275-475 W band, against a median of -0.310.

25 year performance warranty

Bottom 20% of the 275-475 W band, against a median of 30 yrs.

Notes from the database
  • Module efficiency of 20.6% is 1.2pp below average for database panels (median: 21.8%)
  • At 205.5 W/m², this panel generates 12.6 W/m² less per unit area than database median (218.1 W/m²)
  • At -0.36%/°C, loses 0.06pp more power per degree than database median (-0.30%/°C)
  • At 20.3 kg, this panel is 6.2 kg lighter than database median (26.5 kg) - easier handling during installation
  • Ranked #11172 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 375 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.60 % Typical Segment median 21.10%
Vmpp · Impp 34.50 V · 10.87 A Operating point at max power
Voc · Isc 41.10 V · 11.57 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1756×1039×35 mm · 1.82 m² of roof
Weight 20.3 kg Typical Typical · median 22.0 kg
Cells 120 Monocrystalline
Coefficient Pmax -0.360 %/°C Weak bottom 14% of its segment
Coefficient Voc · Isc -0.304 · 0.050 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 20% · median 30 yrs
End-of-warranty output 84.8 % Equals 308 W guaranteed
Degradation 2.00 → 0.55 % 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
-0.360 %/°C against a segment median of -0.310
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Suntech STP375S-B60/Wnhb 375 W 20.60% -0.360 20.3 kg You are here
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +2.5 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +2.5 pp
GKA210M340W 340 W 23.00% - 16.2 kg Lighter, +2.4 pp, +5 yr warranty
GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +2.4 pp, +5 yr warranty
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg Lighter, +2.4 pp, +5 yr warranty
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +25 W, +2.4 pp, +5 yr warranty
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +25 W, +2.4 pp, +5 yr warranty
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg Lighter, +2.4 pp, +5 yr warranty
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +2.0 pp, +15 yr warranty
SPR-MAX3-425-R 425 W 22.40% -0.270 21.2 kg Cooler, +1.8 pp, +15 yr warranty
STP360S-B60/Wnhb 360 W 19.70% -0.360 20.3 kg -15 W, -0.9 pp
STP365S-B60/Wnhb 365 W 20.00% -0.360 20.3 kg -10 W, -0.6 pp
STP370S-B60/Wnhb 370 W 20.30% -0.360 20.3 kg -0.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +135 W, cooler, +4.4 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +120 W, cooler, +4.2 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +130 W, cooler, +4.1 pp

Found 210 panels of the same or similar size to this one, within ±10 mm. See them here Found 271 panels of the same or similar size to this one, within ±25 mm. See them here Found 332 panels of the same or similar size to this one, within ±50 mm. See them here Found 4194 panels of the same or similar size to this one, within ±100 mm. See them here

About the Ultra S mini series

6 answered

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

Are Suntech Ultra S mini panels suitable for a small roof with limited space?
Yes, that is the main purpose of this series. The compact module footprint lets you fit more panels on the same roof area without sacrificing power output - the module reaches up to 385 Wp despite smaller dimensions than standard 72-cell panels. It works well on roofs with multiple planes, dormers, or chimneys, where every centimeter counts.
What is the half-cut technology in the Suntech Ultra S mini and does it actually make a difference?
Cells are cut in half, which reduces the current flowing through each cell and therefore resistive losses and heating within the module. In practice this means higher efficiency, lower risk of microcracks, and better tolerance to partial shading - a shaded half-cell doesn't block the entire string the way it would in a conventional panel.
What warranty comes with the Suntech Ultra S mini 385 Wp panels?
The manufacturer offers a 12-year product warranty covering materials and workmanship, plus a 25-year linear power warranty, standard for modern Tier 1 modules. This means a guaranteed, gradually declining power output over a quarter century, rather than just a single threshold at year 25 as with older-generation panels.
Do Ultra S mini panels perform well on cloudy days and in low-light conditions?
Yes, the series is optimized for low-irradiance performance - it generates more energy early in the morning, in the evening, and on overcast days compared to older module designs. This matters in climates with limited full-sun hours, since annual energy yield depends heavily on how a module behaves under diffuse light.
What is the IP68 junction box on the Ultra S mini for, and does it hold up in coastal environments?
The IP68 junction box provides the highest commonly used ingress protection rating - it shields electrical connections from dust and prolonged submersion, not just rain. This matters for coastal installations, solar farms, or high-humidity regions, where cheaper IP65 boxes degrade faster from corrosion and moisture.
Are Suntech Ultra S mini panels bifacial?
No, these are mono-facial modules with a full frame and a standard backsheet rather than a glass rear layer. On compact installations mounted close to the roof surface, the extra yield from a bifacial panel would be minimal anyway, so a mono-facial design is a cheaper and equally sensible choice.
Add to compare