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Hi, Can someone give me a drawing/ wiring diagram of a twin engine, dual Batt and switch, somebody rewired tis thing and its all screwed up, currently has three Batts.
Thanks in advance
What Rick shows is overly complex. The new way is to build the system with ACR and delete the battery switches.
Both engines start and run on the "start bank" but will charge up the "House bank" while running. The ACR ensures that the start bank gets charged up by bleeding off excess charge amps to it from the house bank. In emergency, like if the start bank poops out for any reason, your ACR will automatically parallel the house batteries so that you will be able to start the engines.
The 1,2,BOTH, OFF switches are cheap and dirty solution that manufacturers throw on to solve this charging problem. I don't use them at all. The new way is far better. Does not require you to worry about what position the switches are
Usual load of old-timer BS from you. You complicate what doesn't need complicating and I'm sad to see that you can't see that.
2 start batteries and one house battery.