ECO-WORTHY 100 Watts 12 Volts Polycrystalline PV Solar Panel Basic component for off-grid solar panel system, caravan, RV, boat, green house solar panel system. Perfect for 12-volt battery charging or multiple panels can be wired in series for 24/48-volt battery charging or for grid-tied applications. Easy Installation with pre-drilled hole, each solar panel comes with 90cm 12awg cable with MC4 Male/Female quick connectors. Waterproof IP-65 Rated Junction Box : Advanced water and dust proof level (complete protection against environmental particles and low pressure water jets). solar cell: Solar Cell with a higher-than-average 17% to 19% efficiency and an internal blocking diode which prevents reverse current drain at night. High modules conversion efficiency. Ideal output: 500 watt hours per day (depends on sunlight availability) Polycrystalline Solar Panels are ideal for many off-grid applications and its corrosion-resistant aluminum frame allows for extended outdoor use. Waterproof IP-65 Rated Junction Box: Advanced water and dust proof level (complete protection against environmental particles and low pressure water jets).