oh so u don't want a temporary cig-type connection, u want a permanent, mounted solution! Fine that box looks like it's spec'ed correctly.
As far as idle consumption, I went into the trouble of reading the spec sheet and it says nothing about idle power consumption so u will have to ask the vendor. If you are concerned, I know when hooking thing like this in a car, you can either hook it up to the ALWAYS ON POWER (no matter where the key is), and ACC ON (only powered when the key is in the ACC position).
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