Emergency Start Button - Connects both Battery banks

fourthclassC wrote:
Want to have the option to draw from the engine battery if needed, if I kill the coach battery bank. What do you all think about this? Thank you

BAD idea. YOu only have to run both batteries down ONCE to know how bad.

A much better plan:
Run your generator when the coach batteries start getting weak.
OR
Run the chassis engine. It should automatically connect both sets together and charge both while it is running.