[RE-wrenches] unique battery bank design question

[Exeltech]

Hi Jason,

Well designed off-the-shelf converters can achieve 90% efficiency, and as you mention, this will vary a bit depending on the rated output current of the converter vs. the actual load current.

I've designed and built  24V @ 25A to 12V @ 50A converters for my own use that are in the 95% realm.

Your mileage may vary.

Dan


--- On Thu, 9/1/11, Jason Szumlanski <Jason at fafcosolar.com> wrote:

From: Jason Szumlanski <Jason at fafcosolar.com>
Subject: Re: [RE-wrenches] unique battery bank design question
To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
Date: Thursday, September 1, 2011, 3:07 PM

Dan,  What kind of efficiency level (%) can you get out of a DC-DC supply on a small load, say <5A @ 12V with a 48V->12V converter? Is the efficiency level highly variable depending on load as a percentage of the converter’s maximum capacity, or is it pretty constant?  I run into this once in a while, so this piece of information would help me make some better decisions.  Thanks,  Jason SzumlanskiFafco Solar 
   
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