Goal Zero Solar generator, charger/power supply with brand new internal battery. Can easily be expanded with an additional battery with easy plug in on the back. This unit comes with an internal charge controller, a pure sinewave Inverter (1500w max continuous, 2400W peak). Can be charged with solar panels (one included) or the included 110v power adapter. It comes with a high amp plug for connecting additional external batteries. Cart for easy moving (can be removed). This has had very little use as we now have an on-board generator in our camper. This is also pretty good for home use in an emergency. THERE IS NOTHING WRONG WITH IT. Everything works as designed $550 OBO Firth area, Cash only (as I am old). NO HOLDS. Email me ONLY, KSL messaging does not notify me so it could be days before I see a message