Bobsmith

well, here I go again. I need lots of help and any feedback anyone out there can give me will be greatly appreciated. I have 2 clark lift truck engines 36/48 volts dc. I need controllers batteries and what the heck is a dc/dc converters or whatever you call it.
I have a 37’ off shore fisherman that I am converting to electric. I plan to run separate controllers for each motor and past that I have no idea what I am doing. The motors will take 120 volts so I have a general idea what I need as far as batteries are concerned but I don’t know where to get any of the things I need. For instance, I need splined shafts like the kind that go into a tranny from the tail stock of the driveshaft. I can’t even find the right place to buy them. okay, I’ll stop crying. lol Any help will be greatly appreciated