I know this doesn't apply here but people with smaller systems and a vehicle can just run a few items off the idling car. I know my truck outlet is 400W so I'd run my Dart and one heater. I could do that for a LONG time and already have everything I need (50 foot extension cord). 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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