The only settings are: Test Mode, 12, 16, 24, 32, 40, 64 and 80. There is no 50 amp setting. The good thing is that the car remembers the last setting used so it will not ask for 64 amps again after I manually dialed it down. But I don't recommend anyone else doing this since if the car gets reset, it will again ask for 64 amps. I am the only one who charges my car and I am very attentive when it comes to watching what it is drawing. I like using the 64 setting (rather than 40) since I can dial it up a bit and use both chargers regularly to even out the wear and perhaps less power to each will be better for their electronic components.