I just had the same problem. I bought my 2013 ACE 30.1 last April. I winterized it in November but did not remove the batteries. First learning experience! REMOVE THE BATTERIES I tried to go by the MH about every two or three weeks and start the unit and let it run for about 20 minutes. Second learning experience! 20 MINUTES WILL NOT CHARGE AND MAINTAIN THREE BATTERIES I recently went by to check and the house batteries were dead. The starting battery barely started the engine. Also, my hydraulic leveler control unit was going crazy. Third learning experience! YOUR BATTERIES HAVE TO BE CHARGED FOR YOUR LEVELERS TO WORK
Here is where these forums are so valuable. My dead house batteries were Marine/Deep Cycle that I imagine were original on the unit. Before going out and buying two 12 volt Marine/Deep Cycle batteries to replace those I decided to do what I should have done last April. I researched batteries and asked questions on forums. The consensus seemed to be that Marine/Deep Cycle batteries were pretty much useless as house batteries. Most people recommended that I buy golf cart batteries if they would fit in my battery bay. I have plenty of room.
My thought was that I would have to buy four 6 volt golf cart batteries to get the same power as two 12 volt Marine/Deep Cycle batteries. Fourth learning experience! After more research and browsing these forums I found out that two 6 volt golf cart batteries could have as many amp hours as two 12 volt Marine/Deep Cycle batteries. By the way, I now know what AMP Hours are.
I found two golf cart batteries at Sam's for $122 a piece that had AMP Hour ratings of 235. The two Marine/Deep Cycle batteries I originally found at Sam's for $100 a piece had AMP Hour ratings of 110. Fifth learning experience! 235 AMP Hours versus 22O AAMP Hours. Series versus Parallel.
I have purchase a three stage battery charger, AC/DC Voltmeter and a hydrometer. Cost me less than $100. Because we do not dry camp and given the fact that my battery bay is huge I decided against AGM 6 volt batteries (twice as much money)and decided to go with traditional flooded cell. I also now know the difference between traditional flooded cell, AGM and Gel batteries.
I will check my batteries at least bi-monthly and fill with distilled water if they are gassed. My cranking battery is now out of the MH and on a trickle charger at home. Because the two new golf cart batteries were tested before leaving Sam's I am going to leave them in the MH until our first trip in late March. I am also going to test my converter as soon as it gets warm to make sure it is working.
This mini novel is a tribute to all who are willing to give their time, knowledge and experience to us newbies!