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【STURDY SOLAR PANEL】The solar panel using grade A plus monocrystalline solar cells for high conversion efficiency. With a low-iron tempered glass and corrosion-resistant aluminum frame, the solar panel is protected against weathering and wear. 【PROTECT THE BATTERY】The 40A charge controller fully protect the battery and prevent it from over-charge, over-discharge, over-voltage, over-current, over-load, short circuit, reverse polarity, and over-temperature. The indicators for easy observation of charging and discharging status. With USB output port. 【HIGH COMPATIBILITY】The 18V solar panel and charge controller form a basic off-grid solar kit for charging 12V batteries. Perfect for RV, cars, boats, hiking, camping, caravan, generator, solar water pump, etc. 【PORTABLE DESIGN】Flexible Solar Panels equipped with a foldable design, waterproof IP67 material, making it ideal for outdoor or winter use. Size-30.5*19.7inches(77.5*50cm), provide more flexibility for outdoor and off-grid use, easy to carry, store and set up. 【EASY TO SETUP】Pre-drilled holes on the back of the panel facilitate quick installation and securing. The panel is equipped with an IP65 junction box and standard MC4 connectors. This protects the panel from harsh environments, and play connector for easy use.