Forum Discussion

Beaver_Thunder's avatar
Jul 11, 2019

Battery Maintenance

We recently bought our first coach and need advice on maintaining the batteries.

Before I ask my questions, here is some history on the coach. When we fist bought it, the chassis batteries weren't being charged via the inverter. The previous owner recently had installed all new batteries and a new Xantrex freedom sw 2012 inverter/converter. He installed a battery fill system on the 4 6 volt batteries via a set of hoses and hand pump. He told me that he had to fill the batteries once a month with distilled water. After looking it over I determined that the Magnum smart battery combiner was installed incorrectly, after correcting it, the inverter is now charging both chassis and house batteries. So now that everything appears to be in working order I need to understand the best way to maintain the batteries when I'm not using the coach.

Is the Xantrex a good battery maintainer or should I be looking into adding a separate battery maintainer? With the inverter in charge mode, coach plugged, batteries are at 13.57 volts.

How often should I need to added distilled water to those batteries?

The rig is a: 2001 Beaver Patriot Thunder with 2 group 31 chassis batteries and 4 6 volt house batteries.

Any tips, advice will be appreciated. Sorry for the long post, thought the info would be relative.

Thank you, Kevin
  • Leave the rig plugged in. If the temp probe is not installed then install one on the house batteries. Be sure the battery/charger cables are correctly sized for the new installation.

    Check the water level frequently until you have some history. I wound up checking every 3 months and water every year. Your mileage may vary. And expect storage vs usage variations.
  • just watch them on a monthly base, your volt reading is in great shape. as time goes on you,ll be checking them every couple months. do the same for the whole rv make a check list, then do it, hoses ,,lights ,belts etc.
  • If it's a multi stage charger you should be alright. It'll go into float when the batteries are charged. Some new chargers like my MH will actually stop charging all together if needed and turn back on when charging is required. Google your model and see what it says.

    We've had Flow Rite battery watering system in our last MH and I installed it in this one too. Yes you fill the batteries by squeezing distilled water from a jug into them. Doesn't use hardly any water at all. Monthly is more than enough. Unless you cycle the batteries often by using the invertor.

    But do monitor each individual battery with a volt meter every month to make sure each battery is ok.