No, I don’t have an ignition relay between the dc-dc converter output and the 12V battery as your set up shown in the schematic diagram. That’s right the relay prevents the dc-dc converter from drawing amps from your 12V battery. I thought about installing a relay between the dc-dc converter output and the 12V battery too. However, I never had a chance to do it. Since I know that my dc-dc converter only draws 10mA, so it’s not much to worry about for now.
Do you have an ignition relay between the DC-DC converter and the battery? I still have to measure the amp draw with the DC-DC converter disconnected, but I think the relay should prevent the DC-DC converter from drawing amps from my 12V battery. Here’s a of my DC-DC converter to the 12V battery.
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