characteristic:1 The color intelligent LCD screen displays the battery input voltage output voltage battery capacity frequency 50Hz or 60Hz and load capacity in real time.2. This product is equipped with dual USB ports for fast charging. The AC socket supports the simultaneous operation of two USB charger ports (maximum 4.2A).3. This product is designed to be light, portable, compact, and easy to carry and store. Specification: solar panel 18W: power: 18W 5% size: 420x280x2.5mm DC output: 12V/1.5A USB output: 5V/1.7A weight: 0.7kg type: single crystal solar panel material: aluminum substrate output accessories: DC lineandDC alligator clip power inverter 4000W: input voltage: DC 12V output voltage: AC 220V output frequency: 50Hz maximum power: 4000W rated power: 300W (please ensure that the total speed power of the connected equipment is 300W). Output waveform: modified sine wave 30A 12V 24V automatic solar charging 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 operating temperature: - 35-and60 maximum solar input: 12V battery up to 23V floating charge: 13.7V (adjustable)Discharge stop: 10.7V (adjustable)Discharge reconnection: 12.6V (adjustable)Recharging reconnection: 13VOpening voltage: solar panel 8V (optical delay)Shutdown voltage: solar panel 8V (lamp delay)USB output: 2 USB outputs 5V/2.5A (maximum) The wattage you select depends on the wattage (or amperage) you want to run (find the power consumption by referring to the specification board 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 the maximum load).Package list: 1 x Inverter 1 x Red and black battery clip 1 x Cigarette lighter 1 x Inverter manual 1 x Solar controller 1 x Controller manual 1 x Battery panel 1 x DC cable 1 x DC alligator clip includes: packaging and accessories: 1 x Converter 1 x Red and black battery clip 1 x Cigarette lighter 1 x Inverter manual 1 x Controller manual 1 x Solar panel 1 x DC cable 1 x DC alligator clip