On Tue, 20 Dec 2005 14:50:17 GMT, "Butch Davis"
wrote:

The ability to switch between and/or parallel battery banks is extremely
useful. But, two banks are required for redundancy. As I'm a belt and
suspenders kind of guy I run twin Optimas for my small outboard and carry a
12 volt jumper package for additional backup.

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Be careful with the jumper cables. I know a guy who started a nasty
electrical fire on his sailboat by getting something crossed up in the
heat of battle. I'd much rather have a paralleling solenoid, no
sparks, no mistakes.