I have pulled the dc fuses one at time. When I plug the RV in I hear a thunk. I am not worried about the thunk. But I suspect that the smart part of the transfer switch is using a good hunk of my phantom electric. I have observed that it will shut down if the voltage on the cord goes I too low. Normally I would look to disable this system when boondocking ___but___ I can't if the generator is also using this system. What do you think? Dennis