Inverter I can run off my car in the garage , switch power between the furnace , pumps and heaters and should be ok for a few hours . Im in an area that has underground power so pretty stable , but if its -40 out and the power goes down im simply driving to the airport and flying somewhere warm and not coming back. 
		
	
		
		
		
		
		
	
		
		
	
	
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