ITEM NAME:12V 20W USB Solar Panel with Car Charger Crocodile Clip 30A USB Solar Charg L3U1 12V 20W USB Solar Panel with Car Charger Crocodile Clip 30A USB Solar Charg L3U1 Safety Instructions: 1.Make sure your battery has enough voltage for the controller to recognize the battery type before first installation. 2.The battery cable should be as short as possible to minimize loss. 3.The regulator is only suitable for lead acid batteries: OPEN, AGM, GEL(It is not suited for nickel metal hydride, lithium ions or other batteries). 4.The charge regulator is only suitable for regulating solar modules. Never connect another charging source to the charge regulator. Colour: Black Material: Monocrystalline silicon 1,Solar Panel: Wattage: 20W USB2.0 output: 5V 600mA Output current: 600 mA (max) Load voltage: 12V DC & USB 5.0V No-load voltage: 14V DC & USB 5.2V 2,Controller: Model: PWM Buck charge: 28.8V Float charge: 27.4V USB output: 5V/3A Self-consume: Less than 10mA Discharge stop: 21.4V Voltage: DC 12V/24V Max solar input: Less than 50V Current: 30A Rated working current: ≤20A Discharge reconnect: 25.2V Working temperature: -35℃~60℃ 1,Used to charge mobile phone, MP3, pad, or other USB-charged device. 2,USB female port, easily charge device via USB charging cable. 3,You can place the panel in the sun and use it to directly charge your device. 4,Great for outdoor cycling, climbing, hiking, camping, traveling, etc. System Connection: 1.Connect the battery to the charge regulator - plus and minus.it will show 1 ,if it detects 12V battery, 2 if it detects 24V battery. 2.Connect the photovoltaic module to the regulator - plus and minus. 3. Connect the consumer to the charge regulator - plus and minus. Package includes: 1X Solar Panel 1X Solar Controller 1x Crocodile clip 1X Car Charger