Currently I have my 75/10 MPPT and Orion 12/12-30 wired up in parallel to the battery, which is totally fine. But I recognized that with alternating Solar input whilst driving (shaded by trees, bridges etc.) the voltage is jumping and when starting the car after the engine was off and the MPPT took over, it takes a while for the Orion to realized it should start working. Sometimes it doesn't even put out any voltage/current until the solar panels were shaded for a longer period of time.
I want to avoid this by switching off the MPPT when the ignition is on.
How can I manage this, what cables and components do I need?