MonocrystallineBifacialHJT
Suntech Power undefined STP420S-C54/Nshm

Suntech Power • suntech power ultra v pro mini stp425-445s c54nshm

STP420S-C54/Nshm420W

BifacialHJT
Region:Germany
Region shows where the seller or factory is located. Most ship globally, and all listed suppliers should be able to ship to your current location.
420W
Power Output
21.6%
Efficiency
1722 x 1134
Dimensions (mm)
15 Yrs
Product Warranty
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Key Features

  • High module conversion efficiency
  • Module efficiency up to 22.8% achieved through advanced cell technology and manufacturing process
  • Multi busbar technology
  • Superior optical utilization and current collection capability, effectively improving product power and reliability
  • Excellent low light performance
  • More power output in low light conditions such as cloudy days, mornings and evenings
  • Extended wind and snow load tests
  • Module certified to withstand extreme wind (3800 Pascal) and snow loads (6000 Pascal)*
  • HALF-CELL N-Type TOPCon
  • SINGLE GLASS MONOFACIAL MODULE

Suntech Power STP420S-C54/Nshm Panels: What Your System Looks Like

Based on a standard 10kW residential installation

10kW System Size
24 Panels
Estimated Roof Area
506 sq.ft. (47 m²)
Avg. Yearly Production
11,500 kWh
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Electrical Data (STC)

Maximum Power (Pmax)420 W
Module Efficiency21.6 %
Voltage at Pmax (Vmp)31.96 V
Current at Pmax (Imp)13.14 A
Open Circuit Voltage (Voc)38.46 V
Short Circuit Current (Isc)14.09 A

Mechanical Data

Dimensions1722 x 1134 x 30 mm
Weight21.0 kg
Cell TypeMonocrystalline
Number of Cells108
Front Glass3.2 mm
FrameAnodized Aluminium

Temperature Ratings

Temperature Coefficient of Pmax-0.29 %/°C
Temperature Coefficient of Voc-0.29 %/°C
Temperature Coefficient of Isc0.046 %/°C
Operating Temperature Range-40 - 85 °C

Similar Products

1134 x 1722 mm
Roof Fit Tool

Will These Panels Fit Your Roof?

Don’t guess your solar potential. Our Roof Layout Designer uses the exact dimensions of the Suntech Power STP420S-C54/Nshm (420W modules) to map out your system. Visually plan your array to see exactly how many modules your roof can support based on its specific footprint.

Precision Layout Preview: See exactly how the 420W modules sit on your roof.
Accurate Technical Spacing: Factors in real-world gaps and mounting rails.
Instant System Sizing: Automatically calculates total kW output for this specific panel.
Optimization Tips: Suggestions to maximize your roof’s energy density.
Map This Panel on My Roof

Ideal Use Case

The Suntech Power STP420S-C54/Nshm is designed for specific solar energy applications. This panel is an excellent choice if you:

Build a standard residential 420W system
Prioritize high efficiency performance
Seek cutting-edge technology with superior efficiency
Install in hot climates (low temperature coefficient)
Value solid warranty protection

Don’t guess your solar setup — calculate it first!

Take our Solar Quiz to get a personalized recommendation for panels, inverter, battery capacity, and system size — before you spend money on the wrong setup.

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Product FAQ

How many Suntech Power STP420S-C54/Nshm panels do I need for my home?

The number of panels depends on your energy consumption and roof area. At 420W per panel, a typical 10kW residential system requires about 24 modules. Use our Solar Roof Calculator to get a precise layout based on your actual roof dimensions.

What is the efficiency of Suntech Power STP420S-C54/Nshm?

This panel has an efficiency of 21.6%, using Bifacial, HJT cell technology. Higher efficiency means more electricity per square meter, which is especially valuable when roof space is limited.

Can I get more power from the bifacial Suntech Power STP420S-C54/Nshm?

Yes. Since this is a Bifacial module, it can capture sunlight from both sides. Depending on the reflectivity (albedo) of your roof surface, you can see a gain of 5% to 25% in total energy yield.

What are the dimensions of the Suntech Power STP420S-C54/Nshm?

The module dimensions are 1722mm × 1134mm × 30mm. Always account for these measurements plus fire setbacks and mounting clearances when planning your solar layout.

Is Suntech Power STP420S-C54/Nshm compatible with standard inverters?

Yes, these panels work with most string and hybrid inverters. However, you must check the Voc (Open Circuit Voltage) and Imp (Current at Max Power) against your inverter's MPPT specs.

What warranty does the Suntech Power STP420S-C54/Nshm come with?

This panel includes a 15-year product warranty from Suntech Power. Solar panels typically degrade about 0.4–0.5% per year, meaning this module should retain over 87% of its original output after 30 years.