Yet another battery question

Submitted: Friday, Jul 03, 2009 at 17:25
ThreadID: 70364 Views:3036 Replies:8 FollowUps:10
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Gday
Ok here's what i've got. Waeco cab 50 fridge running off 105A/h battery charged by car with the help of a sidewinder dual battery system.
Now here's the problem. the fridge draws 8.33 amps running off 12v. This by my rough calculations would give me about 6hours of run time ( draining the batt to 50%, correct me if i'm wrong with that...), which isn't much good for running all night.
Now here's my idea that i'm not quite sure about....
The current draw on 240v is only .43A. Would this mean that if i invested in an inverter and run the fridge off the battery via the inverter i would be able to get more run time out of my battery? Having no experience with inverters i'm not to sure wether it will work.
Also if it will work are there any particular size inverter i should look at?

Thanks
Dan
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