Hi George.
 
If you're going the fridge route without a second battery, an easy way to take a load of your single battery, is to turn the fridge down to like -5degC during the day whilst your are driving (and the alternator is running the fridge/charging the battery). When you stop for the evening, immediatley turn the fridge back up to 3-4-5degC. It will takes ages for the internal fridge temp to climb back up from -5degC to +5degC ... maybe 6-8-12Hrs or more. Means your starting battery doesn't have to supply much power overnight (maybe 6Hrs or so), leaving you a healthy battery for the morning.
 
I do have a second battery, but still do as outlined above. I find that the -5degC setting is just low enough to stop things from freezing .... more than a 12Hr day though will freeze stuff (so keep your frozen stuff in the bottom of the fridge). My aux' battery will really only run the fridge for 24-36Hrs, but doing this I can just squeeze 2 days out of the battery.
 
Hope that helps.
				
			 
			
		 
			
				
			
			
				Kev..
 
Going ... going ...  almost gone ... GONE !! ... 2004 D2a Td5 Auto "Classic Country" Vienna Green
2014 MUX LST with fruit
2015 Kimberley Kamper "Classic"
			
			
		 
	
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