I am selling this controller since I have torn this lead-acid project car down to parts after about 30 hours of use in my nominal 144-volt system. I'm planning a new prject using an AC drive system and lithium batteries. While it's capable of 1000 amp output I used this controller "dialed down" to 400 amps max since I didn't want to smoke the tires. It also has adjustable "ramp" which I adjusted to mid-position. The same air-cooled model, with two mounted fans (this one sells with no fan), is listed by someone on E-Bay for $750 and free shipping. I'm asking for $600 plus actual shipping.