Features: 1. The color intelligent LCD screen displays the battery input battery voltage output voltage battery capacity frequency 50Hz or 60Hz and load capacity in real-time. 2. This product is equipped with fast charging dual USB ports and an AC socket supports two USB charger ports (max. 4.2A) to work at the same time. 3. This product is designed to be lightweight portable and compact making it easy to carry and store. Specification: Solar Panel 18W: Power: 18W5% Dimensions: 420x280x2.5mm DC output: 12V/1.5A USB output: 5V/1.7A Weight: 0.7kg Type: Monocrystalline Solar Panel Material: aluminum substrate Output accessories: DC line + DC alligator clip Power inverter 4000W: Input voltage: DC 12V Output voltage: AC 220V The output frequency is: 50Hz Max power: 4000W Rate power: 300W (please ensure that the total rate power of the connected device is 300W). Output waveform: modified sine wave 30A 12V 24V Automatic Solar Charge Controller PWM with LCD Controller and Dual USB Charging current: 30A Voltage: DC 12V / 24V automatic intelligent conversion Display: LCD digital display USB Charger Port: Dual USB 5V 2.1A Working temperature: -35~+60 Maximum solar input: 12V battery up to 23V Float charge: 13.7V (default adjustable) Discharge stop: 10.7V (default adjustable) Discharge reconnection: 12.6V (default adjustable) Charging reconnect: 13V Turn-on voltage: solar panel 8V (light delay) Turn off voltage: solar panel 8V (light off delay) USB output: 2 USB outputs 5V/2.5A (MAX) The wattage you choose depends on the wattage (or amperage) you want to run (find the power consumption by referring to the spec plate on the device or tool). We recommend that you buy a larger model than you think you need (at least 10% to 20% more than your maximum load). Packaging list: 1*Inverter 1*Red and black battery clip 1*Cigarettelighter 1*Inverter manual 1*Solar controller 1*Controller manual 1*Solar panel 1*DC line 1*DC alligator clip includes: 1* 1* 1* 1* 1* 1* 1* 1*DC 1*DC