answered 101 times nowLord Vader wrote: ↑Fri Nov 12, 2021 10:55 am So... Does the car use both batteries to start and run?
NO , the 2nd batt is aux equipment only
answered 101 times nowLord Vader wrote: ↑Fri Nov 12, 2021 10:55 am So... Does the car use both batteries to start and run?
This is why I asked.
what he said , plus a switch like drag racers use to cut their batteries off is good enough to useelc32955 wrote: ↑Sat Nov 13, 2021 5:25 pm RV's commonly do this with the coach & house batteries, the ones I've seen either use a marine-type battery tie switch or a starter-type solenoid tied to a switch on the dash for momentary action. You're going to need some current-carrying capacity no matter how you cut it, the question becomes where & how to route the bridging cable... and how you want to switch the bridge on & off.