High cell efficiency with quality silicon materials for long term output stability and reliability. Strictly quality control ensure the stability and reliability, totally 23 testing procedure to do quality control 3. High transmittance low iron tempered glass with enhanced stiffness and impact resistance Specification: Type: 180W Solar Panel Tolerance: +/-5% SLA Battery Voltage: 18V Type of Solar Cell: Monocrystalline Open Circuit Voltage(Voc): 18V Maximum Ystem Voltage: 18V Temperate Coefficient of Isc: (010+/- 0.01) %/C Temperate Coefficient of Voc: - (0.38 +/-0.01) %/C Temperate Coefficient of Power Voc: -0.47%/C Temperature Range: -40 to +80 Package: 1 X 180W Solar Panel. The item "180W 18V Flexible Monocrystalline ETFE Solar Panel Outdoor Car Battery Charging" is in sale since Saturday, December 28, 2019.This item is in the category "Home & Garden\Home Improvement\Electrical Supplies\Alternative Energy Supplies\Solar Power Supplies\Solar Panels & Kits". The seller is "mhestore2009" and is located in Shenzhen. This item can be shipped worldwide.