Bought one of those ubiquitous voltmeter and USB combos from bangood.com. Thought I would modify the vent on the fridge cabinet to install. But the old grill on the rear face of the cabinet had peeling paint and I didn’t like how the install looked. So I made a new grill from some 3/32″ thick aluminum plate. I milled slots, 3/8″ wide, on 1/2″ centres, 7 slots in total. And I milled a hole for the voltmeter/outlet combo.
The grill turned out a bit “gappy”, a bit too open perhaps. But as you don’t really look at it face on too often it’s good enough. The outlet and meter are wired to my auxiliary fuse panel under the driver’s seat. I thought about a switch to turn the thing off when not needed but I didn’t have a switch that would suit. I might add one later, but right now my big assed house battery will take any parasitic drain.
I’ll replace the mounting screws with the ones that will accept a plastic cap when I can find some.
shooftie 
#1 by Trevor Reynolds on June 19, 2016 - 9:43 pm
I have two sets of gauges and USB plugs waiting to be installed into my van too Alistair. With regards to that blue led light on the USB port, do you know how much draw is on it while the vehicle sits parked? I was thinking of putting a switch in line with my plugs in order to ensure they are not draining the battery while not being driven. What do you think?
#2 by albell on June 19, 2016 - 10:25 pm
Hey I haven’t measured the USB outlet standby current draw. I should, I will. Thanks for reminding me.
A switch on the circuit is a good idea. I should have done that.
Cheers
Ab
>