George,
Thanks for responding back on my question.
I guess that if one was camping full-time or nearly full time in a campgrounds with electrical hookups, then the converter would probably be on 24/7 with all detectors and electronic circuit boards powered up. When our motorhome is in storage in the backyard between trips, I keep it plugged into 120V AC all the time so that the converter keeps the coach batteries charged up by exposing them to their float voltage - which is the norminal output voltage of the converter. During these times we also keep the chassis battery charged by merely plugging a small trickle/float charger into a 120V AC receptacle in the coach and then plugging it's 12V DC output (it came with both a battery terminal clamp lead and a 12V receptacle plug lead) into a 12V receptacle on the cab's dash. The cab dash 12V receptacles are always hot, so they're always hooked up directly to the chassis battery. This means that the small trickle/float charger is keeping the chassis battery fully charged and maintained 24/7.
Storing our motorhome this way has for years kept it's coach batteries and engine chassis battery maintained in top condition, plus so far ...with no apparent bad affects on any other electrical equipment.