sdobbie
100 W
I bought the dual voltage controller here http://www.ebay.co.uk/itm/48V-72V-1...r-/360643190249?ssPageName=ADME:X:RTQ:GB:1123 It can be switched between 48 and 72v. The problem is, my battery has a nominal voltage of 88.8v and comes off the charger at 96v. I only charge it to 4v per cell or sometimes less for maximum life and safety. What modifications would need to be made to the controller? Is it as simple as just changing all the mosfets and replacing the input capacitor and finding a 5v regulator that can take the higher voltage? I currently have the battery configured as 44.4v 44.4ah 1.972 Kilowatt hours for the controller I have which can do 30mph maximum. My current controller is a 9fet one using IRFB4110 and it does 42 amps no problem. I wouldn't want to put any more current through the motor though as I worry that I might rip the magnets off the inside.