315 Watt POLYCRYSTALLINE SOLAR MODULE

High module conversion efficiency

Module efficiency up to 16.2% achieved through advanced cell technology and manufacturing capabilities

High PID resistant

Advanced cell technology and qualified materials lead to high resistance to PID

Positive tolerance

Positive tolerance of up to 5W delivers higher output reliablity

Suntech current sorting process

System output maximized by reducing mismatch losses up to 2% with modules sorted & packaged by amperage

Extended wind and snow load tests

Module certified to withstand extreme wind (3800 Pascal) and snow loads (5400 Pascal) *

Withstanding harsh environment

Reliable quality leads to a better sustainability even in harsh environment like desert, farm and coastline

Trust Suntech to Deliver Reliable Performance Over Time
  • World-class manufacturer of crystalline silicon photovoltaic modules
  • Unrivaled manufacturing capacity and world-class technology
  • Rigorous quality control meeting the highest international standards: ISO 9001: 2008, ISO 14001: 2004 and ISO17025: 2005
  • Regular independently checked production process from international accredited institute/company
  • Tested for harsh environments (salt mist, ammonia corrosion and sand blowing testing: IEC 61701, IEC 62716, DIN EN 60068-2-68)***
  • Long-term reliability tests
  • 2 x 100% EL inspection ensuring defect-free modules
Special 4 busbar design

The unique cell design leads tremendous reduction in electrodes resistance and raise in conversion efficiency. Less residual stress, less cell microcracks and hotspot risks.

Industry-leading Warranty based on nominal power
  • 97.5% 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 80.7% in the 25th year after the defined WARRANTY STARTING DATE.****
  • 12-year product warranty
  • 25-year linear performance warranty
IP68 Rated Junction Box

The Suntech IP68 rated junction box ensures an outstanding waterproof level, supports installations in all orientations and reduces stress on the cables. High reliable performance, low resistance connectors ensure maximum output for the highest energy production.


* Please refer to Suntech Standard Module Installation Manual for details. **PV Cycle only for EU market.
*** Please refer to Suntech Product Near-coast Installation Manual for details. **** Please refer to Suntech Product Warranty for details.

Electrical Characteristics
STC STP315-24/ Vem
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 -40 °C to +85 °C
Maximum System Voltage 1000 V DC (IEC)
Maximum Series Fuse Rating 20 A
Power Tolerance 0/+5 W

STC: lrradiance 1000 W/m2, module temperature 25 °C, AM=1.5;
Best in Class AAA solar simulator (IEC 60904-9) used, power measurement uncertainty is within +/- 3%

NOCT STP315-24/ Vem
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) 7.03 A

NOCT: Irradiance 800 W/m2, ambient temperature 20 °C, 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±2°C
Temperature Coefficient of Pmax -0.41 %/°C
Temperature Coefficient of Voc -0.33 %/°C
Temperature Coefficient of Isc 0.067 %/°C

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 IP68 rated (3 bypass diodes)
Output Cables TUV (2Pfg1169:2007)
4.0 mm2 (0.006 inches2), symmetrical lengths (-) 1100mm (43.3 inches) and (+) 1100 mm (43.3 inches
Connectors MC4 compatible