3.1 Aviation plug cable. Open circuit voltage:21.6V. Short circuit current 13.44A.Maximum power current :12.22A. USB output for charging mobile phones. Can be charge 12v battery and USB electronic Simultaneously. Used for battery charging, camping, traveling, outdoor etc. The item "300W 18V Portable Solar Panel+20A Controller RV Boat Car Camping Battery Charger" is in sale since Friday, December 14, 2018. This item is in the category "Home & Garden\Home Improvement\Electrical Supplies\Alternative Energy Supplies\Solar Power Supplies\Solar Panels & Kits". The seller is "puguangsolar2017" and is located in Shenzhen. This item can be shipped worldwide.