I have just got a 3 way fridge and it states DC12V - 75W - 6.25A.Does anyone know how long it would run off a car battery for!TIA.
andrea_w,
Feb 28, 6:50pm
Not all car batteries are created equal
merrigj,
Feb 28, 7:02pm
Just a ball park figure would be good.I have a diesel 4WD with a newish battery.
Would it last 1hr during a ferry crossing for example, or would it even last overnight!
saxman99,
Feb 28, 7:03pm
I get 6 - 8 hrs on a 12v fridge running from a fairly big deep cycle battery. A standard car battery would be significantly less I would think.
gammelvind,
Feb 28, 7:05pm
Depends on how many amp hours the battery is, and ignore the CCA as that is starting capacity. You are better to get a deep cycle battery as this is designed for this type of use. Your question requires a lot more information.
gammelvind,
Feb 28, 7:06pm
Yes it would last the ferry crossing, and maybe overnight, BUT you may not be able to start the vehicle the next day.
merrigj,
Feb 28, 7:14pm
Thanks guys will just use it in the car getting from A to B then.Thanks for the advice.
tmenz,
Feb 28, 7:50pm
It should certainly work OK for 1 hour without any problems.
As for overnight: 6.25 amps for 12 hours = 75 amp hours. With a duty cycle of 50% this becomes 37.5 amp hours. A 4WD diesel battery is probably around 90~105 amp hours Therefore it would drain about 1/3 of the battery's capacity overnight. This would probably be enough to ensure that you would have trouble starting the next day.
thewomble1,
Feb 28, 8:02pm
There is a gismo that fits between thecig lighter andthe fridge plug. When the voltage of the battery drops to around 10.2 volts it will turn the fridge off leaving enough charge in the battery to start the engine. I got mine at K-MART
tonyrockyhorror,
Feb 28, 9:34pm
Use the LPG. You'll screw your starting battery.
yendor,
Feb 28, 9:39pm
We just put a couple of frozen milk bottles in our camper fridge while traveling, keeps it cold overnight easily.
elect70,
Feb 28, 10:03pm
qualitydcfridgeswill cut out atcertaindrain limit so still have enoughto start the engine.i used big chilly box with2 kg dry ice&10kgordinary ice( had my ownice machine ), keeps beer & food chilled for5 days .
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