Wednesday, January 20, 2016

[Electric Boats] 12V DC -> 120V AC vs. 48V DC -> 120V AC

 

I recently converted the auxiliary propulsion on my boat to an Electroprop system with a 210Ah 48V battery bank.
To keep things simple and (for me) safe, there will be no 120V AC appliances aboard that are run by shorepower.
However, in future coastal cruising I might want to run a cheapo Home Depot (USA) dormitory sized 120V AC refrigerator through an inverter from the battery bank. My "usual" house load will be handled by a 48V DC -> 12V DC converter. But, as I understand it, DC -> DC voltage conversions are inefficient, and I am wondering if a separate 48V DC -> 120V AC inverter for the high-draw refrigerator (and maybe microwave) might be more efficient than a 48V DC -> 12V DC -> 120V AC setup.
Apologies in advance if this is not really an Electric Boat topic.
--Bob Moriarty


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Posted by: moriartybob@yahoo.com
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