Car fridge power

I strongly suggest she invests a little more in a compressor fridge. The thermo electric units are only any good while the engine is running (IMHO).

She will still need a 2nd battery, but I would think that one of the Thumper type would be best.

Mind you, she's starting to get up into the bigger $$$ area now....but the items should be readily saleable if she decides she no longer needs them after the trip is over.

Roachie

Ditto. Another strong recommendation against. A thermoelectric fridge will not do what she wants and will, IMHO, guarantee battery problems during the trip. They draw a lot of current and are not particularly effective.

My opinion, if you stick the thermo fridge connection in the factory outlet it won't work after a few weeks (buggered my prado connection and it was a compressor fridge), both i think (and my brother has an X Trail) will flatten the battery close to overnight in warm humid environments. To be honest a good esky with well frozen ice will be better overnight in the NT durinng winter. She will probably never be more than 2 days from ice and a good small esky in an air conditioned X Trail during the day will keep ice cold for more than a couple days. However, if she wants to drink a few every night then go a compressor and a second battery is my opinion. Not necessarily installed under the bonnet, perhaps something chargeable while she is driving. Everything is possible, depends what you're doing.

For wiring u can buy a Waeco Raps12 which has two sockets and 7 meters of the correct size wire Autobarn have some for$89 at the moment It also has a switch that allows you to run it all the time or just when the ignition is on.
The standard vehicle sockets have wiring which is far too light as per the Prado post. Only good for running lights etc.

Get an AGM(and only a sealed) battery in the rear and the correct wiring etc and a good fridge and all will be well

As others have said, sell the "thermoelectric fridge" get a compressor fridge, because as others have also said, she will never keep the power up to the thermoelectric fridge full time from a Cranking battery, maybe ok for a few days, then one day she goes to start and it's DEAD, she's parked in the bush and can't start the car, who will she blame ?

I would not even consider using the vehicle's Cranking battery to power ANY fridge full time, they are not made to do the job.

Put an AGM DC battery it in a plastic battery box, fit a battery isolator and an auto cut-out device and she will then have no power problems.

Mainey . . .