For instance, I have the 5 volts from the two parallel 7805's running to the motherboard, but the motherboard is grounded to a 7.5 volt battery array. Will that work? Shouldn't the 5 volts ground from the motherboard and the grounds from the 7805's equal 7.5 volts again?
That image is the most efficient design I could come up with to date, but it uses quite a few redundent switches.
Any help and suggestions would be appreciated
EDIT: Due to changes in the design, this post and thread is now obsolete.