[David and Teresa]

The last trip in my coach was in March and since then, it has been stored hooked up with shore power. So, this weekend I start getting the coach ready for travel at the end of the year, and 3 of the 6 house batteries positive posts are dissolved. When I opened the bay, the 3 posts had that "corroded" build up. When I started cleaning, the positive cables are still attached to each other, but no post. 

Obviously, I now need new batteries, but what happened?