[Larry]

My truck has 3 12v batteries in series. I have been concerned about anything that will be draining the batteries all night. That's one reason why I'm hesitant about installing a 110v refrigerator. Any experience out there???

By the way, you need to be careful about using the cigarette lighter for running various 12v equipment. The wiring to the cigarette lighter is often a thiner gauge than that used for plugging in accessories. You could cause the wiring to overheat.

[Lawrence]

Larry,

Have you considered using a heavy duty Battery Isolator?
This would allow you to utilize the power of a battery ('s)
without draining your cranking battery. When your engine is running
the isolator would allow the "source" battery to be re-charged.

>My truck has 3 12v batteries in series. I have been
>concerned about anything that will be draining the batteries
>all night. That's one reason why I'm hesitant about
>installing a 110v refrigerator.

Lawrence
Expediters Online.Com

[Weave]

The switched deep cycle battery thing has been working great for the very few I know who use it. It's a great idea I have meant to implement but haven't had a chance to. Larry's 3 batteries, like mine are cabled in a parallel circuit, not series.
Better than the (again) sort of complex deep cycle battery wiring thing, just buy good batteries- I recommend Interstate- I can shut down with my 3 and watch TV for a few hours, and fire up the mini-heater and a 12V 8" fan and run them as long as I want. My antique Cummins will still crank and fire right up even in the coldest weather. This is stuff for die-hard military oriented cheapo solos- not for teams. Teams-- buy a rigmaster to boil your crab legs and caviar!
--Weave-- God I know I'm in for some teams to bash me here!