The quick answer is YES but if you have the smart-mode technology on-board converter/charger this is real reduced.
My older converter only put out 13.6VDC all the time and this is just a tad over the DC voltage whichmakes the deep cycle batteries boil just a bit. The deep cycle batteries like to see 13.2VDC in float mode. With my older 13.6VDC converter I had to really watch my battery fluid levels and it was normal to find the battery fluids down in only a few weeks of being hooked up 24/7.
Since then I have replaced my older style converter/charger with a smart mode technology PD9260C 60 AMP converter/charger for my four installed batteries and out of habit I still check my batteries every couple of weeks but never see them needing any fluids replenished. I do have to add small amount of fluids in about six months of time now. My requirement for a 60AMP model converter/charger is due to the additional batteries being used. The standard converter/charger is usually a 45AMP or 55AMP model depending how big the trailer is and what appliances are on board. The smaller trailers may only have a 35AMP model.
The smart-mode technology type converter/charger also does other battery maintenance for you automatically... A nice upgrade if you don't have these units. I suspect the Smart-mode technology converter/charger are all standard now with the newer units. Check the model number and look it up on-line or look in your provided technical brochures for your appliances which should have been delivered with your new trailer.
Roy and Carolyn
I claim Horse Creek Country in Southern Ill - Momabear is from North Texas
We live in King George VA
RETIRED DOD DOAF DON CONTRACTOR Electronics Tech 42YRS
"We're burning daylight" - John Wayne
2008 STARCRAFT 14RT OFF-ROAD POPUP with PD9260C and three 85AH 12VDC batteries
2010 F150 FX4 5.4 GAS with 3.73 gears - Super Cab - Towing Package - 2KW Honda EU2000i Gen
K9PHT (since 1957) 146.52Mhz
"We always have a PLAN B"