Monday, February 6, 2023


Why do my RV batteries only last a year or two?

By Mark Polk, RV Education 101
Why do my RV batteries only last a year or two?

What can I do to extend the life of my RV lead-acid batteries?

How do I maintain my RV lead-acid batteries?

These are all good questions and, yes, a common problem among RV owners is having to replace their lead-acid RV batteries every year or two. There are several reasons for this, but in most scenarios, the cause is the batteries are left in a discharged state for a long period of time. When this happens, sulfation starts forming on the lead plates, and the battery dies long before it should.

The good news is, the more you understand about lead-acid batteries the longer the batteries will last. The last set of lead-acid batteries I had in our RV lasted almost 7 years and they were cycled hundreds of times. In the below video I offer 5 tips to extend the life of your lead-acid batteries. Click to play.

To learn more about using and maintaining your RV visit RV Online Training


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Jim ransdell
1 year ago

Battery life boils down to common sense care, buy quality and a solar panel helps a lot. My battery is 7 years old. I don’t remember the brand but I paid 600 dollars for it.

1 year ago

My deep cycle batteries last 10 yrs. I had one boil dry last year and I don’t know exactly why so I changed them both. I keep the motorhome plugged in year around – charging only with the on-board converter. The vehicle radio is disconnected. I check them monthly – +100 deg or -35 deg they stay in the motorhome. Keep em’ charged and keep em’ wet above the plates.

Phil & Peggy
1 year ago

Upgrade to AGM and be done with ALL the lead-acid xxxx problems.

Kevin Rice
1 year ago

I want to purchase new Lithium Ion batteries for our motorhome. What brand do you recommend?

Wayne C
1 year ago
Reply to  Kevin Rice

I have been very happy with the pair of Battle Born batteries I purchased a year ago. The slightly higher voltage makes motors work better and the flat discharge voltage curve keeps everything running strong to the end of the charge. I also like that the terminals cannot be damaged by over tightening. I know 1 year isn’t much of a test but they come with a 10 year warranty.

1 year ago

I lost one of my batteries last year at 10 years old. The other one is still working fine and since we no longer dry camp all that often I am going to keep using it for the foreseeable future so that I can purchase the replacements as a pair. Or maybe go with 6 volts I have not yet decided.
Maintenance is key.

fred ford
1 year ago

very good. we use walmart deep cycle batteries and the present ones are over 6 years old. battery minder is the trick. i have 6 in use on the farm. they keep the batteries fully charged with out boiling the water out. i love them. great investment. if you watch northern tool adds you can get them for 50% off. i never use the on board charger/converter when at home. my last farm tractor battery lasted 8 years. the people at the co-op could not believe it. thanks and best of luck.

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