Finally ,and after my summer vacations i did my new project ,Maria the robot.
Maria has two way to move around,first with she's li po battery for indor or outdoor use and second
for outdoor use,she use a 10W solar panel for alot of time of use until the sun goes down (hide) : i put a dc to dc converter to keep voltage stable(9v).
Maria is the first intelligent robot that she can move only with sun energy ,with she's solar panel 10W 1,4ma.
also i put it a battery checker and two hands to keep thinks.