Lightly Used Goal Zero Sherpa.  It works great, I just don't use it very much.It includes the Inverter so you can plug directly into it.  It sat for about a year with a full charge and when I checked it a couple of days ago, it still had a full charge, so it is a great piece of equipment.Charge the Sherpa 50 in 2-3 hours from wall, or 4-6 hours from car, or 5-10 hours from solar (Nomad 13 solar panel sold separately)Sample run times: laptops 1-3 hours, tablets 15 plus hoursIncludes the bolt-on inverter that converts the Sherpa 50 into a portable wall plug (110 Volt US plug)Compact and lightweight - less than 1.5 poundsIncludes Sherpa 50, wall charger, and bolt-on inverter