Well, if you tie up 3 12V batteries in series, that is: positive battery 1 to negative battery 2 and positive battery 2 to negative battery 3 then you would have a 36V system, for 32 volts you would have to connect 4 8V batteries in series (trust me, I'm the factory technical manager for Club Car golf cars and I deal with this every day!). Remember, connect batteries in series to add their voltages but keep the same amps and in parallel to add their amps but keep the same voltage.
