Hi Fixit,,A bit off topic from my original post and forgive me for being a little daft when it comes to electrical but if you could indulge me with a question or two. On my switch it's either on or off,, no other positions. (maybe that's what you mean by the..".. this vs the 1, 2, both and off switches...)
When my switch is in the off position I can still start my engine, meaning (I'm assuming) there is no connection from this switch to my start battery. I only have to turn the switch on to power the VHF, GPS, radio etc. When I shut the engine down and at anchor, I leave this switch on to power the electronics with the house battery. While at anchor and engine off, would I be correct in assuming that there would be no current draw on the start battery? In this case, with the engine stopped, is it the ACR that isolates the start battery from the house battery and prevents it from being discharged even though they both are connected to the ACR? Final question: since my switch has no emergency combine or "Both" position, the only way to use the house battery to assist in starting the engine should the need arise , would be to jumper the two, or is there something missing in my thinking?? Thanks in advance for any feedback that you could provide to enlighten me.