Wondering if anyone has had experience trying to modify the power output of the main battery? Is there a way to bypass the car control systems to allow a greater draw? Right now, I am finding that any increase draw results in a complete shutdown of the system within 1-2 sec (Car is too smart!)

 

Not sure what you mean by complete shutdown. In any event, system is very sophisticated, with dangerous voltage levels, and under the control of smart computers. Suggest you get an old classic car to park alongside the Lexus and work on that instead.