The list author says: "The most basic of solar charged battery backup systems takes a battery, charge controller, solar panel and inverter. This system uses the Duracell 600HD powerpack which has a built in charge controller, 600 watt inverter and 28 amp hour 12v sealed lead acid battery. Add to it a 25 or 30 watt solar panel and you have a starter system that can be recharged from a 50% discharge state in about two days of good sun."
"This is a durable 30 watt solar panel that comes with cables and connectors to attach directly to the Duracell 600. It includes it's own charge controller that will plug into any 12v car adapter power socket to charge up a 12 volt battery. The Duracell 600 has such a 12v socket which this panel plugs right into without any additional cables, adapters or connectors needing to be purchased."