help with power source isolation

[steve1814]

Guys,
this was originally posted in the battery forum, but i didn't get any response so I closed it....

I have been working on an all-in-one power solution for my chargers where I can use the chargers on battery power at the field and then switch over to "shore" power (A/C) at home without having to change/remove/relocate the chargers. The positive leads are selected through the use of a Marine battery selector switch in a on1/off/on2 configuration, but I have a question whether I need to isolate the negative (ground) wires on the buss bar from the batteries and power supplies.

I have drawn up a small diagram to show the proposed wiring. Can I get someone to confirm that I won't have problems with the ground being common on two power systems? They will not be running at the same time, other than the battery tender floating the batteries while on shore power.

Thanks,
Steve

[Ron W3FJW]

I live in a motorhome and all my systems have a common negative or ground. The only difference is that instead of using a battery switch, I have an automatic transfer contactor so when shore power (server power) goes off, it switches to battery power automatically.
You should have no problems with your setup.. :)