hi,
i am an electrical engineer and i have an experience in designing PCBs, analog electronics and microcontroller based embedded systems. i can design your circuit and also its PCB Layout.
I will use PIC microcontroller for checking the availability of input resources e.g (wind, power and USB) and a programming logic would be define in microcontroller to charge the batteries. i can also modify this circuit with LCD to show the status of batteries and input resources.
please contact me if you have any question or need further details regarding to the project.
thanks,
Rizwan