No 12 V power at all W/O shore line or generator

matthewjscott wrote:
Coach batteries are two years old and plates inside were dry.

Three things:

Multi-meters are cheap; sometimes even free at Harbor Freight.
You NEED one in the RV.

Then....you probably will be shopping for new batteries. They likely won't function right again after going completely dry.

And....you then need to try and figure out WHY they went dry.
With use averaging one week a month during the summer and 3 months of storage, the level in mine barely dropped below the "full" indicator.