On your advice at the boat show seminar I bought a battery monitor. I have a couple questions on wiring it up. The diagram shows the operating power coming directly from the battery so does it have to be on all the time and cannot be wired past the isolation switch from a fuse panel? For the 2 wires coming from the shunt to monitor - can they be encased boat wire and not inter looped single wires as demonstrated? To use with an auxiliary battery, does the entire negative auxiliary load have to be connected to shunt (batteries are in 2 different locations)?
Remember the old adage: "there are no shortcuts". This rings especially true on boats. Here are the answers to your questions.