Alltrax SR-72400 motor controller. Perfect for a golf cart or electric car conversion. Works with either series wound or permanent magnet dc motors. Voltage: 24-72V nominal Current: up to 460A USB programmable, works with many different throttle types. Has only been used for a couple hours of testing. More details can be found here: https://alltraxinc.com/product/sr7240012-to-18-volts-400-amps/