For an EZ-GO 48 volt conversion you will need an upgraded controller, 48 volt solinoid (36v HD will work but could burn out quick) of course 6 eight volt batteries, or 8 six volt batteries, 4Ga cables through the entire cart, and a way of charging the cart. GORO has some pics of his cart with a 48 volt set up. with the set up he has (8 six volt batteries) you can use your 36 volt charger and a 12 volt charger. I just built my cart for hunting and chose not to go 48 volt. got a 650 controller, 8.5 hp electric motor(BEAST) HD buss bars on F&R and 2GA cables. it has all the power i need for climbing through the woods
YES!!! The GE Beast motor has all the power for climbing hill you can ask for, even more torque with a 650 amp controller. The stock controller will not have the power you are looking for. I will warn ya it is not the fastest thing probably around 17 or 18 mph on a full charge, but it will pull anything you put behind it or climb any hill you are brave enough to try and climb.