Suntech 315W Polycrystalline Solar Panel

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Trust Suntech to delivery reliable performance over time! A world-class manufacturer of crystalline silicon photovoltaic modules, Suntech has unrivaled manufacturing capacity and world-class technology. Panels undergo rigorous quality control meeting the highest international standards, including ISO 9001: 2008, ISO 14001: 2004 and ISO 17025: 2005. This is backed up by regular independently checked production processes from internationally accredited institutes and companies.


  • High module conversion efficiency
    Module efficiency up to 15.5% achieved through advanced cell technology and manufacturing capabilities
  • Positive tolerance
    Positive tolerance of up to 5% delivers higher output reliablity
  • Extended wind and snow load tests
    Module certified to withstand extreme wind (3800 Pascal) and snow loads (5400 Pascal)
  • Excellent weak light performance
    Excellent performance under low light conditions
  • Suntech current sorting process
    System output maximized by reducing mismatch losses up to 2% with modules sorted & packaged by amperage
  • Withstanding harsh environment
    Reliable quality leads to a better sustainability even in harsh environment like desert, farm and coastline. Tests include salt mist, ammonia corrosion, and sand blowing testing
  • Compact and Durable Frame Design
    The new compact frame means more modules per package, so it saves your shipping and inventory cost. The rigid and durable hollow chamber guarantees the same long-term and reliable performance.
  • IP67 Rated Junction Box
    Supports installations in multiple orientations. High reliable performance, low resistance connectors ensure maximum output for the highest energy production.


Suntech 315W Polycrystalline Solar Panel has a rating of 5.00/5 based on 1 reviews.

Solar Satisfaction

I've been using the 315 watt solar panel for a year now and it is great. Charges my 230A/H AGM battery even under cloud although at a reduced rate of course. I didn't clean it for a few months but it still charged at a reasonable rate. When I finally got around to climbing up the ladder, I found the panel was quite dirty and had a few bird droppings and dead insects on it. Also the glue they supplied with the panel worked well but you must prepare the roof surface well and scour the surface of the brackets well to give a long lasting grip. Follow the instructions to the letter.

on 12 March 2018
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Suntech STP300-24/Ve
Electrical Characteristics STC
Maximum Power at STC (Pmax) 315 W
Optimum Operating Voltage (Vmp) 36.8 V
Optimum Operating Current (Imp) 8.56 A
Open Circuit Voltage (Voc) 45.1 V
Short Circuit Current (Isc) 9.02 A
Module Efficiency 16.2%
Operating Module Temperature -40oC to +85oC
Maximum System Voltage 1000 V DC (IEC)
Maximum Series Fuse Rating 20 A
Power Tolerance 0/+5 %
STC: lrradiance 1000 W/m2, module temperature 25oC, AM=1.5;
Best in Class AAA solar simulator (IEC 60904-9) used, power measurement uncertainty is within +/- 3%
Electrical Characteristics NOCT
Maximum Power at NOCT (Pmax) 229 W
Optimum Operating Voltage (Vmp) 33.2 V
Optimum Operating Current (Imp) 6.91 A
Open Circuit Voltage (Voc) 41.5 V
Short Circuit Current (Isc) 7.30 A
NOCT: Irradiance 800 W/m2, ambient temperature 20oC, AM=1.5, wind speed 1 m/s;
Best in Class AAA solar simulator (IEC 60904-9) used, power measurement uncertainty is within +/- 3%
Temperature Characteristics
Nominal Operating Cell Temperature (NOCT) 45+/-2oC
Temperature Coefficient of Pmax -0.45 %/oC
Temperature Coefficient of Voc -0.33 %/oC
Temperature Coefficient of Isc 0.067 %/oC
Mechanical Characteristics
Solar Cell Polycrystalline silicon 156 × 156 mm (6 inches)
No. of Cells 72 (6 × 12)
Dimensions 1956 × 992 × 40mm (77.0 × 39.1 × 1.6 inches)
Weight 25.8 kgs (56.9 lbs.)
Front Glass 4.0 mm (0.16 inches) tempered glass
Frame Anodized aluminium alloy
Junction Box IP67 rated (3 bypass diodes)
Output Cables TUV (2Pfg1169:2007)
4.0 mm^2 (0.006 inches^2), symmetrical lengths (-) 1100mm (43.3 inches) and (+) 1100 mm (43.3 inches)
Connectors H4 connectors


10 year solar panel warranty - 10 year product warranty - guaranteed free from defects in materials and workmanship 25 year solar panel warranty - 25 year performance warranty - guaranteed 80% of rated solar panel wattage

Industry-leading Warranty based on nominal power - 97% in the first year, thereafter, for years two (2) through twenty-five (25), 0.7% maximum decrease from MODULE’s nominal power output per year, ending with the 80.2% in the 25th year after the defined WARRANTY STARTING DATE.

For more information, please read our full warranty policy

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