[Chuck v]

I agree with RayChez, checking quarterly is about the right frequency. On my front four batteries (6 volt golf cart style) I have installed a filling system since it is so challenging to see down into the cells for the electrolyte level at their location under the windshield.

I would do the same with the house batteries -- but have yet to find a way to fit up to the manifold style cell covers on the Exide batteries I have there. The golf cart style batteries up front have individual caps. My chassis batteries that start the diesel are also sealed/maintenance free style like Ray mentioned his coach has fitted.

Chuck