Xantrex XPower 300 PowerPack Personal Back-up Power This is a terrific, well designed product that can provide temporary power to a wide variety of electrical products. It can even jump-start your car or truck in an emergency (I know, I've tried it!). Includes: 20 Amp-hour AGM Sealed lead acid battery 300W DC to AC inverter (115V AC) 1 AC outlet DC outlet LED battery capacity indicators AC charger & DC charging cable for car charging 2 tube fluorescent emergency light Emergency jumper cables Measures about 12" tall X 12" wide X 8" deep. The battery in this unit is rated at 20 amp-hours. 10 hours of sun with a 20 watt panel would add 12 amp-hours to the battery. Using a vehicles DC output or lighter socket, the unit will charge in 2-4 hours. AC charger charges in up to 40 hours (500mA). This unit will power a: Clock Radio for 20 hours. Included Fluorescent emergency light for 25 hours. 5" TV for 8 hours. 12" TV for 3 hours. Laptop computer for 6 hours. Cellphone for 36 hours. Built by Xantrex, the maker of Trace inverters, who has built a reputation for their high quality products. Weighs about 17 lbs., your getting a lot of value for the money.