I am both interested in the idle power, and the operating efficiency
This often comes up, but what does it require to allow a DC appliance to wait
and simply turn on when when necessary and not waste power when it is off?
Darryl
From: Exeltech <exelt...@yahoo.com>
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Sent: Thursday, September 1, 2011 3:30 PM
Subject: Re: [RE-wrenches] unique battery bank design question
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 <ja...@fafcosolar.com> wrote:
>From: Jason Szumlanski <ja...@fafcosolar.com>
>Subject: Re: [RE-wrenches] unique battery bank design question
>To: "RE-wrenches" <re-wrenches@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 Szumlanski
>Fafco Solar
>
>
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