Originally Posted by PJ47
We don't mind that it uses AC instead of DC and it has a battery back up so we are happy with that rather than the constant aggravation of the battery drainage issue and the unit not lasting 5 years!
OIC.. that explains it. I had not seen a propane detector that ran off of internal, replaceable batteries. Having an alarm that runs on the trailer's battery (or internal batteries for an extended time) would be an absolute requirement for most of us who think a propane alarm is appropriate, since we use propane without shore power. But for your situation it sounds like it might be fine. On the other hand if you leave it on and operating on battery back-up (such as when traveling), then functionality is limited and battery life will be comprised. It really is intended to be powered 24/7 in a home, with perhaps a short power outage. But you do get two more years out of it.. it starts beeping "end of life" at seven years instead of five.
As for the battery drain, a master battery cut off switch is the way to go, for when the camper is not being used for a while. If you eliminate the propane alarm then perhaps you will not have any other "hidden" (parasitic) loads and therefore not need the cut off switch.. but then again you might - IDK what Parkliners have.
If you remove the propane tanks, then the alarm is not needed.