MonocrystallinePERC
Suntech Power undefined STP620S-C78

Suntech Power • ultra v pro stp620-640s c78nsh+

STP620S-C78620W

PERC
Region:China
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.
620W
Power Output
22.2%
Efficiency
2465 x 1134
Dimensions (mm)
15 Yrs
Product Warranty
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Key Features

  • Multi busbar technology
  • Superior optical utilization and current collection capability, effectively improving product power and reliability
  • High power output
  • Zero LID, ultra-low LeTID, better anti-PID performance, low power attenuation, high power output
  • Double-sided power generation
  • The gain of double-sided power generation increases up to max. 25% with the light on the back side, and significantly reduce LCOE
  • Extended wind and snow load tests
  • Module certified to withstand extreme wind (2400 Pascal) and snow loads (5400 Pascal)*

Suntech Power STP620S-C78 Panels: What Your System Looks Like

Based on a standard 10kW residential installation

10kW System Size
17 Panels
Estimated Roof Area
517 sq.ft. (48 m²)
Avg. Yearly Production
11,500 kWh
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Electrical Data (STC)

Maximum Power (Pmax)620 W
Module Efficiency22.2 %
Voltage at Pmax (Vmp)45.76 V
Current at Pmax (Imp)13.55 A
Open Circuit Voltage (Voc)55.58 V
Short Circuit Current (Isc)14.26 A

Mechanical Data

Dimensions2465 x 1134 x 35 mm
Weight35.1 kg
Cell TypeMonocrystalline
Number of Cells156
Front Glass2 mm
FrameAnodized Aluminium

Temperature Ratings

Temperature Coefficient of Pmax-0.29 %/°C
Temperature Coefficient of Voc-0.29 %/°C
Temperature Coefficient of Isc-0.25 %/°C
Operating Temperature Range-40 - 85 °C

Similar Products

1134 x 2465 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 STP620S-C78 (620W 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 620W 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 STP620S-C78 is designed for specific solar energy applications. This panel is an excellent choice if you:

Need premium 620W panels for maximum power density
Maximize energy output in limited space (22.2% efficiency)
Want proven monocrystalline technology for better performance
Install on commercial buildings with ample roof space
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 STP620S-C78 panels do I need for my home?

The number of panels depends on your energy consumption and roof area. At 620W per panel, a typical 10kW residential system requires about 17 modules. Use our Solar Roof Calculator to get a precise layout based on your actual roof dimensions.

What is the efficiency of Suntech Power STP620S-C78?

This panel has an efficiency of 22.2%, using PERC cell technology. Higher efficiency means more electricity per square meter, which is especially valuable when roof space is limited.

What are the dimensions of the Suntech Power STP620S-C78?

The module dimensions are 2465mm × 1134mm × 35mm. Always account for these measurements plus fire setbacks and mounting clearances when planning your solar layout.

Is Suntech Power STP620S-C78 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 STP620S-C78 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.