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Suntech STP555S-C72/Nmh+
Suntech Brand review

STP555S-C72/Nmh+

555 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 6,639 of 14,129
Compare panels Datasheet PDF
Power (Wp)
555
Weak · bottom 5%
Efficiency (%)
21.50
Weak · bottom 8%
Density (Wp/m²)
214.8
Weak · bottom 6%
Temp (%/°C)
-0.320
Weak · bottom 8%
Weight (kg)
32.8
Weak · 1.6 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The Suntech Ultra V Pro series was designed with the goal of maximizing energy yield in real-world operating conditions - not just in the laboratory. Its foundation consists of N-type TOPCon cells, which help minimize typical power losses associated with degradation during the initial months of operation and support stable production for years. In practice, this translates to better predictability of investment profitability and greater peace of mind for the user.

Bifacial construction is available in many variants, enabling the module to actively utilize reflected light from the ground surface - providing additional gains where every percentage point counts (e.g., light roofs, ground-mounted installations, carports). The Ultra V Pro series also features dual glass in selected versions, enhancing resistance to demanding environments (moisture, salt, ammonia) and facilitating parameter maintenance over time.

This series is suitable for residential and C&I installations, as well as for utility-scale PV farms, where a low temperature coefficient and energy cost throughout the project lifecycle are crucial.

Ranking

1,022 panels in the segment TOPCon 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.50% 22.44% Weak · bottom 8% 8,022
Power density 214.8 224.4 Weak · bottom 6% 8,213
Temperature coefficient -0.320 -0.290 Weak · bottom 8% 8,376
Weight per kWp 59.1 53.8 Weak · bottom 5% 12,115
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

Residential, commercial and utility-scale.

Not ideal for

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

Watch-outs
59.1 kg per kWp

Bottom 5% of the TOPCon 550-600 W segment, against a median of 53.8. Ranked 12,115th in the whole database.

214.8 watts per square metre

Bottom 6% of the TOPCon 550-600 W segment, against a median of 224.4. Ranked 8,213th in the whole database.

21.50% module efficiency

Bottom 8% of the TOPCon 550-600 W segment, against a median of 22.44%. Ranked 8,022nd in the whole database.

Notes from the database
  • Efficiency of 21.5% is 0.9pp below the TOPCon 550-600W median (22.4%)
  • Power density of 214.8 W/m² is 9.7 W/m² below TOPCon 550-600W median (224.4 W/m²) - needs more roof space
  • Temperature coefficient of -0.32%/°C is 0.03pp worse than TOPCon 550-600W median (-0.29%/°C) - higher losses in summer heat
  • At 32.8 kg, this panel is 1.6 kg heavier than the TOPCon 550-600W median (31.2 kg) - more demanding for installation crews
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 555 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.50 % Weak Segment median 22.44%
Vmpp · Impp 42.24 V · 13.14 A Operating point at max power
Voc · Isc 50.07 V · 14.07 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2279×1134×30 mm · 2.58 m² of roof
Weight 32.8 kg Weak Weak · 1.6 kg above median
Cells 144 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.320 %/°C Weak bottom 8% of its segment
Coefficient Voc · Isc -0.260 · 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 89.4 % Equals 485 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
-
With bifacial gain
-

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

Heat losses
-0.320 %/°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 STP555S-C72/Nmh+ 555 W 21.50% -0.320 32.8 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +3.5 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +3.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +3.2 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg Cooler, lighter, +3.2 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +3.1 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, 16 kg lighter, +2.9 pp
STP530S-C72/Pmh+ 530 W 20.50% -0.340 32.0 kg -25 W, hotter, -1.0 pp
STP535S-C72/Pmh+ 535 W 20.70% -0.340 32.0 kg -20 W, hotter, -0.8 pp
STP540S-C72/Pmh+ 540 W 20.90% -0.340 32.0 kg -15 W, hotter, -0.6 pp
STP545S-C72/Pmh+ 545 W 21.10% -0.340 32.0 kg -10 W, hotter, -0.4 pp
STP545S-C72/Nmh+ 545 W 21.10% -0.320 32.8 kg -10 W, -0.4 pp
STP550S-C72/Pmh+ 550 W 21.30% -0.340 32.0 kg Hotter
STP550S-C72/Nmh+ 550 W 21.30% -0.320 32.8 kg Very close match
STP555S-C72/Pmh+ 555 W 21.50% -0.340 32.0 kg Hotter
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +95 W, cooler, +3.7 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +90 W, cooler, +3.5 pp

Found 2327 panels of the same or similar size to this one, within ±10 mm. See them here Found 2369 panels of the same or similar size to this one, within ±25 mm. See them here Found 2383 panels of the same or similar size to this one, within ±50 mm. See them here Found 2543 panels of the same or similar size to this one, within ±100 mm. See them here

About the Ultra V Pro 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 panel?
The most powerful variants of the Ultra V Pro series reach up to 605 Wp. This is achieved through N-type TOPCon cells, which offer higher efficiency than conventional PERC technology. As a result, fewer modules are needed to cover the same roof area, lowering installation costs and simplifying system design for both residential and C&I projects.
Is the Suntech Ultra V Pro panel bifacial?
This Ultra V Pro variant with TOPCon cells has a monofacial construction, generating power only from the front side of the module. Suntech does offer bifacial versions within the broader Ultra V Pro family, featuring dual-glass construction - worth checking when selecting a specific model if extra yield from reflected light is a priority.
What warranty comes with Suntech Ultra V Pro panels?
The Ultra V Pro series carries a 12-year product warranty along with a 30-year linear power output warranty. This means the manufacturer guarantees a minimum level of energy production over three decades, providing predictable ROI and financial stability for the solar project.
How does TOPCon technology in Ultra V Pro differ from standard PERC panels?
The N-type TOPCon cells used in Ultra V Pro have a lower first-year degradation rate and smaller power losses in subsequent years compared to typical P-type PERC cells. In practice, the panel maintains higher efficiency for longer, resulting in greater cumulative energy yield over the system's lifetime.
Is Suntech a reliable and bankable panel manufacturer?
Suntech is a Chinese manufacturer with a long track record in the industry, classified as a Tier 1 supplier, which indicates financial stability and bankability for projects using its modules. This status makes it easier to secure financing and insurance, and provides greater confidence in future warranty servicing.
Do Ultra V Pro panels perform well in high summer temperatures?
Yes, one of the advantages of the TOPCon cells used in Ultra V Pro is a low temperature coefficient of power. This means a smaller performance drop during heat waves compared to older technologies, which matters when designing PV farms and rooftop installations in high-irradiance regions with hot summers.
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