according to your lastest post it sounds like there is nothing wrong with your alt. Yes you should get 30 amps if your bat is dead and you have everything turned on. The alt will only put out what it needs i.e. if your bat is fully charged and you have nothing on you will see a virtually a 0 amp draw. Just like charging a battery with 110v charger. A dead battery will draw max amps but as it charges the amps will lower until the bat is full and the amps will be zero.