Composite PV Backsheet
INTRODUCTION
Photovoltaic (PV) backsheets are essential components in solar modules, serving as the protective layer on the rear side of solar panels. They primarily function to safeguard the solar cells from environmental factors such as moisture, UV radiation, and mechanical stress while ensuring electrical insulation. Composite PV backsheets, in particular, combine multiple layers of high-performance materials to deliver superior durability and performance.
Characteristics
Light Weight
Flexible
High Strength
Corrosion Resistant
Application
Applicable to flexible photovoltaic modules and portable photovoltaic modules.
Technical Parameters
| Test Item | Typical Values | ||
| Mechanical Properties | Room Temperature | 85℃ 85%RH, 1000h | PCT48H |
| Tensile Strength 0° | 323Mpa | 306Mpa | 313Mpa |
| Tensile Modulus 0° | 17Gpa | 17.6Gpa | 18.2Gpa |
| Fracture Strain | 1.9% | 1.6% | 1.9% |
| Functional Performance | |||
| HDT | 161.2℃ | ||
| Breakdown Voltage | 26.38KV | ||
| Partial Discharge | 1820V | ||
| Volume Resistivity | 3.579*1013Ω·m | ||
| Reflectivity(White) | ≥50%(400-1100nm) | ||
| Water Vapor Transmission(Infrared Sensor Method) | ≤1.0g/(M2·d)(38℃，90%RH) | ||
| POE Film Adhesion | Room Temperature 91N/cm, PCT24H 43N/cm | ||
| Wet Leakage(Water temperature 22±2℃，Resistivity≤3500Ω/cm | Room Temperature＞99GΩ, PCT24H 28GΩ | ||
| Thermal Aging Performance(160℃ 6h) | The tensile performance retention rate＞90% | ||
| UV Aging Resistance Performance(200kW·h) | The tensile performance retention rate＞90% | ||
Product Specification
| Gram Wegith | Thickness | Color | Form | Width Option | Maximum Roll Weight |
| 870-930gsm | 0.6±0.1mm | Natural and Black | Rolls and Sheets | 50mm-2600mm, custormized | 1570kg |
| Application | |||||
| The surface is coated with paint, suitable for both roll coating process and screen printing processes. | We provide fumctional photovoltaic abck panel according to customer requirements, such as V0 flame reardant. | ||||