Very true. That is one reason that the large loads, slides & landing gear, are powered before the battery disconnect. There should be no parasitic loads associated with these components. That said, it appears that the control panel on my 2013 327res draws a slight amount of current to keep the "Panel Power" button dimly lit. This is evidenced by a slight arc when the negative battery lead is lifted. The panel itself is also powered before the disconnect switch. I'm still checking this out.
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