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		short answer yes i do carry pass in the rear and did look into mounting on the single rear seat area but my pass is tall so the seat is pushed further back and the rear wheel arch gets in the way as well as the base in the D2 is not flat so I would have to mount it higher to make fit. It just did not fit well with the waeco hence located in the rear for now.
the voltage is amazing, i will try again during the day to test it out on a hot day and see the diff in volts. I must admit i had nothing in the fridge not sure whether this makes any diff, will try again empty on a hot day soon. 
as for the battery not sure what it is, its a NRMA battery which i called them and found out its a high CCA battery but they were none the wiser about the aH rating on these 2yr warranty batteries they stock. Its listed as a heavy duty 4wd battery.
	 
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		Fridges always work better/easier full;)
I am not sure a wet cell battery inside the vehicle, even in a battery box is a good idea.