Re: dual battery installation
You can use a battery switch that provides selection of BAT 1, BAT 2, BOTH and OFF. Instructions come with the switch. You can also install an isolator. It allows charging both batteries just like a switch does in the BOTH setting. It also serves as an isolation device so one battery doesn't discharge the other. The only problem with a battery switch is that it must never be set to OFF with the engine running. It will fry the regulator/rectifier. If that's the way you go, be sure the switch is a "make-before-break" style. This means that the new connection is made, before the existing one is broken. In other words, when switching from BAT 1 to BAT 2, the connection to BAT 2 would be made, before the connection to BAT 1 is broken. This eliminates the frying regulator problem mentioned earlier.
