[Fulltiming]

Forest is correct. The coaches are set up to automatically merge the house and chassis batteries so they will both get current from the alternator when the engine is running. However, Newell recommends routine replacement of the battery merge solenoids. If the merge solenoid fails, you can end up running down the coach batteries. These are continuous duty solenoids. Do not let someone try to replace them with starter type solenoids. Starter type solenoids are meant to only be engaged for a few seconds, typically less than a minute, at a time. They will not last but a short time before they overheat and fail when subjected to continuous duty.