mkirsch wrote:
The "smart" charging system in your truck will only ramp down voltage when it senses that the battery is charged. Your camper batteries will keep the system thinking that it is not charged, and will keep the alternator running at the required output to charge the batteries.
Not completely correct. The smart charging systems in vehicle today provide the absolute minimum voltage to prevent the vehicle battery from going dead after the energy used to start the car has been replaced.
This is typically NOT enough to
recharge an auxiliary battery in the RV. It might keep it from going dead, but you will never get it 100% recharged.
