Suggest the OP read "Testing Your Batteries" in the Twelve Volt Side of Life. You need to unhook them to properly test them. And the readings on your monitor may be charger readings, and not battery voltage readings.
And just what type of batteries do you have? Wet Cell, AGM or maybe GEL cell batteries?
and how easly can the batteroes be accessed for you to check and add distilled water to the electrolyte if needed, provided they are wet cell batteries.
ginagary......You're going to find people on this forum that will run the batteries until they'll barely turn on a light, hook them to a 1950's battery charger and use them some more, to people that believe in preventative maintenance and replace theirs before they have problems.
You need to decide what is best for you. I use my inverter quite often and could tell mine were just not lasting as long as they use to. This was year five on mine. If you've been religious about maintaining yours, you may get six or seven years depending on how you use them. Just remember, the batteries are the heartbeat of your coach, similar to the engine being the heartbeat of your chassis. Many people believe that because they're doing very little boondocking, battery care/maintenance is not important. What they forget or don't understand is that your lighting, refer, heater, water heater and other items ALL run through the batteries even when connected to shore power.
I always thought Winnebago cheaped out when it came to the batteries on your coach and similar DP's in that era. You have two 12v starting batteries and three 12v house batteries. If you check, you'll see that you have room to keep the two 12v batteries and room for four 6v batteries. When it's time to replace, I would look at going with the four 6v batteries.
My sister has a Meridian with the same battery setup. When it came time to replace the batteries, we changed them to the four 6v. They're much happier with this setup.
Don & Mary
2005 Monaco Diplomat 36SKT
2012 Chevrolet Silverado LTZ CrewCab 4WD
2013 Polaris RZR 800 LE
Hi. I agree with don. Batt maint is critical. Chng to 4. 6 volts. Plz look Trojan t105's. Good luck
Have a wonderful day..
ANNIE - 2008 Safari Cheetah-40 SKQ- 08 Jeep Liberty Toad
CAT 7 350- C-7, Serial # WAX65944
ReadyBrake Surge Brake System integrated w/ReadyBrute Elite RV Tow Bar-BLUE OX Plate
Still in WPP..