At 12:51 PM 9/20/2012, Rocket J Squirrel wrote:
>Anyone know of a three position (1/2/off) battery switch?

Try a Filnor A-2011 (bottom left on this page)
http://www.filnor.com/html/products/knife-switch.php .  With a cover
over it, obviously.  That's a 600 amp switch - there are probably
smaller ones in the catalog.

Normal marine battery switches all provide make-before-break
connections because disconnecting the battery from a running
alternator will spike the boat electrical system as the alternator
suddenly unloads (they also typically have a field disconnect
terminal that shuts off the alternator before the switch is rotated
to OFF).  So even if there were not a specific 1+2 position, it would
still exist while switching.

Yours,
David