Al, i thought the perko was similar to my bep switch, 1,2 combined and off
http://www.jamestowndistributors.com...elector+Switch
which is combined with the vsr in a small compact package for auto isolation.
Ed, looks like you have to get either system. blue seas or bep.
Al, you always find the deals, i searched ebay fro weeks before i pulled the trigger online.