A mobile solar collecting device, system and method is disclosed. The system includes an angle adjustable solar collecting device, an electronic storage unit to store electric energy collected by the mobile solar collecting device, a first power connecter to electrically engage with a second power connector affixed to a structure to feed electricity to an electric power grid, a transport unit to move the mobile solar collecting device, a controller. The controller directs the transport unit to periodically move the adjustable solar collecting device to optimum solar collecting locations, provides an indication to adjust an orientation of the adjustable solar collecting device to obtain maximum energy from a sun, and directs the transport unit to move the mobile solar collecting device to a location where the first power connector electrically engages with the second power connector to discharge energy in the electronic storage unit to the power grid.