There is no park that would care whether you used or did not use an autoformer. As mentioned above, the autoformer draws additional amps and turns them into volts. It WILL bring lower voltage to higher numbers at the expense of total amps available. This is usually not any kind of an issue as we generally don't max out our amps but it can be if you are trying to run A/C plus other accessories on a 30 amp circuit. So now if you had 30 amps available without this unit you might only only have 20-25 amps left over.
