If you combine 2 batterys of the same voltage in parallel the total voltage will remain the same but its total power or watts per hours will Increase depending on the combined Amps of the 2 batterys. Ex you can combine 2 3 or how ever many 36v batteries in parallel and the output will always...
i had this controller for a bit over a year now, was running it sensored with my old dd hub, till it went bonkers outta nowhere (axle began to strip from overtightening/ craptastic material) so ordered a cheapish halless controller to use with another motor i got. So figured why not toy around...
Not sure about the Mosfets (even though they are essentially glorified "smart"switches) It would be much simpler if you ran your phase wires through a 3 or 4 position switch with an appropriate current rating and presto. one position all phases are for forward clickity click click, and reverse...