I'm not sure who I am replying to, as the "Reply" button doesn't seem to be specific. So I will answer all the questions posed, as well as comment on some statements.
1) Molaker.. Yes, it happens when plugged into shore power, and the flickering only occurs then. The lights are dim though and the battery status monitor rapidlly drops to low (it's a basic one with 1 to 4 red lights). When I first bought the trailer from a supposedly reputable dealer, it was 4 years old. I intended it for full time living (which I have now done for several years already) At the time , however, I had not moved in, and repeatedly I would arrive at the unit with the power out and the battery dead. Despite a half dozen attempts to see why the 120V power cut out, we never really got to the bottom of it (the park blamed the power cable and the dealership blamed the park hookup). Be that as it may, this happened after my being away for less than 48 hours and only one or two lights had been left on (say, the porchlight) ,consisting of these tiny litle bulbs generally used . Also, the propane devices would not start and the battery monitor was dead.
2) So, yes, Kevin, A battery status monitor is part of the electrics in the trailer - As I mentioned it's the simple one with four red lights, four lit up for full and one for low..
3) I have no idea what brand the charger/converter is, but it's what they put in Fleetwood Quantums betweem 2004 and 2008. Mine is a deluxe edition 2006 Fleetwood Terry Quantum.
4) Gary- The system absolutely has a "low voltage alarm" .. which is precisely what it is labeled as.. it's next to the circuit board as part of the CO2 and propane alarm.
5) Kevin.. Yes, it is a single deep cycle RV battery, the green ones that RVs usually have. Mine appears to be the same as the old one I used to have in a tiny 14 footer. I think it's the bootom of the line, but the dealership was cheap. It appears to be a "group 24 SRM", but it simply can't tell if it's a good one or not. I would like a whole lot more capacity, however. Given enough time it will always charge back up to full. It just appears unable to deal with the amount of current being demanded off of it.
What sucks is that at the time I did not know enough to know that the dealership was just trying to avoid their responsibilities when they said they "didn't know" why my trailer's battery should be dead after a day disconnected from shore power. He said "the battery should last several days". He acted like it was all my fault, though, probably to save the cost of a replacement converter / battery He also said that piercing alarm must have been a propane alarm because "there's no such thing as a battery alarm" - OK so I didn't know it was called a "low voltage alarm". It wasn't propane. I hadn't moved into it yet and had no need for hot water or heat , and anyways it was summer.. So, not a touch of propane in the unit, yet he claimed that iy "had " to be a propane alarm. Suuure. It turned out part of the problem was a bad battery (the one they originally supplied) although it toojk a year of complaining before they "found out" that it couldn 't hold a charge in half of it's cells. What I've found on line , though is that it's possible that if it were a bad converter/charger it would have wrecked it.
Over the last 3+ years I have brought up the issue almost a dozen times, always pointing out that this haoppened from the day I bought the unit. First they played dumb, now they say they can't remember me talking about it then, so it's not a responsibility issue with them.
Fine. Lousy dealer. I still need to fix the issue. The upshot appears to be that if I have enough current availability for my needs (ie a larger battery, or 2 parallel 12 V), the charger won't be working overtime and causing it to, essentially, burn out.
I'd prefer a l;arger battery,(more AH) but don't know precisely what to look for. The ratings and pricings are confusing. Also, because of my porevious experience with the dealership (thus my point in telling y'all what went down), I think they might havce replacesd mine with a bottom of the barrel.. It's an SRM 24 12 volt MArine/RV.. not a sealed battery, but fluid levels look good. Also, ATM, I haven't been using the furnace or many lights, so my charge meter reads full and my lights are NOT dim or flickering.
I can't think of anything else to add..
Thanks for all your suggestions! Nick
Also, where is the charger/converter located? I have a junction unit (not the master circuit breakers) in the front bedroom of the trailer. I haven't examined it closely, however, as I'm opposed to yanking wires willy nilly unless I am DEAD sure I know what I am doing ;-)