1.The efficiency of monocrystalline solar cells is up to 20%. 2.Outdoor solar panels can effectively convert sunlight into electricity. 3.Epoxy resin surface lamination, IP65 waterproof, improve durability. 4.Lead-acid battery universal controller, more practical. Maximum power: 600W Open circuit voltage: 20V Maximum power voltage: 18v Short circuit current: 1A Maximum power current: 0.3A Standard test conditions AM=1.5 Irradiance = 1000W/m² Temperature = 25℃ Color: As Shown Material: Single Crystal Silicon + Plastic Package Contents: 1 x solar panel 1 x battery clip 1 x car charger 1 x Chinese and English instruction manual 4 x suction cup 1 x controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.