only just getting 12v on camper battery with car running ?

Submitted: Thursday, Jan 12, 2006 at 08:50
ThreadID: 29600 Views:3594 Replies:18 FollowUps:12
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with the 3 way fridge on in the jayco camper we can not seem to get the same volt reading as the main battery.
The set up is : main battery connected to second batt under bonnet via ARB smart seperator,6mm cable to rear of car to a 50amp anderson plug then 6mm cable from anderson plug to campers 80amp battery.
I have installed a digital volt gauge from jaycar to monitor the camper batt and on our last trip after 5 hours of driving the read out on the camper was 11.7V,all i can think is the 3 way fridge on 12v is using more power than can be supplied through the 6mm cable from the second batt to the camper. when i saw ths low read out i checked the batts under the bonnet and both around 14V.

any thoughts?
cheers.
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