Battery Charge After Winter Sitting

[Larry-P]

We have our Monty sitting at a RV park for the winter. Unit has been winterized, power & water dis-connected, battery ground wire removed. This is our first year at this.
Yesterday I was at the site & re-connected the battery ground & connected the shore power with my surge connector attached. Surge connector had okay coding of power. I left the Monty pluged in about 6 hours. I did not use any equipment within the unit nor did I open the slides. My purpose of being there was to charge the battery & clean up the area of leaves, twigs, etc.
After about 6 hours of yard work it was time to leave. Unhooked the shore power & was ready to leave when I thought to check the battery status. The monitor panel showed one red light for an instant for the battery & then went out. I would take this as meaning the battery is not charged.

My questions are --
Do I need to turn on the converter after non-use ??
Where is the converter located on our model - 2011 3345SA ??
Is there a fuse I should be checking first & where is that fuse box ??
Should I dis-connect both connections of the battery, clean the posts & connectors & re-atteched to fix the problem ??
Could it be low water in the battery itself ??
Should I use a volt meter to determine if the battery is charged & not rely on the monitor system ??

I know these are a lot of questions but I'm trying to learn what procedure I should follow in the future.

Thanks in advance for any & all help.

Larry P

[DQDick]

I don't know a lot about this, someone who does will be along soon, but is it possible you froze the battery. If so, it might be dead.

[kdeiss]

I never left my battery in the unit at the campground over the winter
Would bring home keep in garage and hook charger about once a week now I use a battery tender again at home

You need to check Battery and charger with a volt meter

[seahunter]

If I may throw a question in too... If you are plugged in like this but have the battery disconnect off, will the batteries still charge?

[1retired06]

You indicated you did not use anything in the fifth wheel. Are you sure the converter kicked on?

[racerjoe]

If the battery did not take a charge,it may have a shorted cell. you can do a voltage check to see if you have approx 13.5 to 14 volts. but the best way is to remove the batt. and take it somewhere to do a draw test and see if it has a bad cell. DQDICK is correct a weak battery will freeze and ruin it.