Alternator not charging house batteries Allegro V10 2004

It's very common for the soloniod contacts to become pitted and not making good contact. When you have AC does the engine battery charge and should it? You may have an electonic controller for the solenoid that doesn't active just because the key is on but rather battery voltage and activation delays say after starting.

Determine what your RV should do and any changes made by prior owners.