Proposed vehicle power system

Submitted: Wednesday, Apr 02, 2008 at 16:39
ThreadID: 56194 Views:2844 Replies:4 FollowUps:13
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Hi All,

I want to run a recently aquired 35 litre Weaco compressor fridge in the cargo area of the Prado and am checking out the best overall power system to keep it going on a permanently installed basis. This is in addition to a 40 litre Weaco that will only be in the car for trips where one can be a fridge and the other can be a freezer.

The vehicle already has a Pirahna DBS180 dual battery controller feeding a Trojan 115AH deep cycle wet cell mounted in the engine bay. There is a 6mm cable from the deep cycle to the cargo area terminating in two hella plugs.

I have two new 100AH sealed lead acid batteries that I want to mount in the cargo area and they will fit neatly ahead of the fridge (behind the 2nd row seats) with appropriate securing frame bolted to floor.

I am looking at connecting an Arrid twin charge unit between the existing 6mm cable from the dual battery and the two rear batteries. I am also looking at an adjustable low voltage cutout between the Arrid and the dual battery set to around 12.8v.

This would mean whenever the underbonnet dual battery is receiving a charging voltage from the Pirahna controller (alternator is running) then the Arrid will also be charging the cargo area battery bank.

When the engine is off the Arrid would continue to charge the rear batteries until the voltage in the front battery drops to 12.8 and the low voltage device cuts it off. Same would apply if I was camping and put my generator powered charger on the front battery.

The rear battery bank would run the installed fridge. I can still run the 2nd fridge off the front dual battery if required and all batteries get charged whenever alternator or charger power is available.

Can anyone see any issues with this system or offer any contructive comments?

Cheers
Muddy
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