Battery/shore power question

Your battery charger in the converter is messed up instead of trickle / maintaining, It's either not charging or over charging.

What converter is in the RV?

how deeply are you discharging your battery when you go camping?

Have you checked the voltage at the battery when the converter is charging it?

No you should not.

If you are checking the water level each month and maintaining the proper level, then you need to buy better batteries.

I'm just sharing what I do, not saying it's right or wrong for anyone else.... My trailer is a 1999 with original (basic) converter. I leave my shore power cord plugged in, but turn off the circuit breaker for the converter. I then plug aftermarket battery tender into one of the interior electric outlets, and attach to batteries. I check water about every other month, but never really needs any.

Batteries should certainly last longer than a year. I pay a little extra for maintenance free batteries for a couple of reasons including checking them in my Lance TC is a PITA and the battery in the TT is big (a 4D which is equivalent to two group 27's).

First question is shy do you leave it plugged in? Second question is what model converter/charger is in the TT and is it a 3 way?

I would disconnect the battery in any case if you go for long periods without using the TT. If you don't have a built-in battery disconnect switch it's easy enough to add one right in the battery box. Check with your local RV store.

We kept our last TT 5 years and if we were at home it was plugged in. I checked the water in twice and it was good both times. You have something wrong.

Been there done that. Your onboard charger most likely is a single stage charger. Replace it with a 3 or 4 stage charger like a Progressive Dynamics Inteli-power 4600. I finally got tired of the short life span of improperly charged batteries. Your charger is cooking your batts because it only puts out one continuous voltage. Keep us posted.

I treat my 5er as a camper. And to me that means it is used only when we go camping, about 30 days a year. When sitting there at the side of the house, waiting for the call to go and see the world, it is unplugged, frig off, and the batteries disconnected. I will check those batteries throughout the winter to make sure they stay fully charged. I may plug the rig in a couple of times a winter and also connect the batteries for about 24 hours each time to charge them up. That's it. My current Trojan T-105's were purchased in 2008.