[Wayward]

I keep the batteries on the Airstream with small marine type solar panel strapped to the top of the propane tank cover. No problems so far.

Like most plain ole lead acid batteries they will destroy themselves if they sit uncharged for a long time.

If you are replacing them, I suggest using Optima batteries. They are glass mat gel and can sit uncharged for years without damage. They need no maintenance (unlike sealed lead acid) and won't leak acid even mounted on their side.

..........Scott