With this electricity box you can power way more then just charging your phones,   this box can power basically anything from 12v fridge, laptops, LED TV, Juicer, Tools, Stereo System,Lights.  
Its portable and easy to use!  
 
Included in the box:  100AH deep cycle battery, 3000watts inverter, 12v 20A charge regulator, 2 USB sockets, 12v socket, 220v socket.    you can choose between either a solar panel or a battery seperator (considering the space on the roof etc...)