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Date:      Sat, 29 Nov 2014 01:04:54 -0500
From:      Michael Powell <nightrecon@hotmail.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: OT: UPS for FreeBSD
Message-ID:  <m5bnm6$li2$1@ger.gmane.org>
References:  <CAHieY7QGp2ELF-R91eu=vSrPsimVmVNJQ4kfucQ56PR7EEZmig@mail.gmail.com> <m57qdq$did$1@ger.gmane.org> <54777AB1.9010800@bluerosetech.com> <m581p1$65m$1@ger.gmane.org> <54779629.302@bluerosetech.com> <alpine.BSF.2.11.1411271433320.60866@wonkity.com> <5478BD4F.7020306@yahoo.com> <5478BEE6.30308@bluerosetech.com> <5478CC08.9090307@yahoo.com> <20141128204722.561f948e@archlinux> <5478F16A.80605@yahoo.com> <CABhTyc9m7fOoeV170dj=foAhmyYWphzc8KD8wBacu5gNRPhT%2BQ@mail.gmail.com> <54791d3a.w/pI0kak03d%2B3nKC%perryh@pluto.rain.com> <CAHu1Y71vVbdx6Yd1VbE7kb_8k9O5UG93RXEaORPU0tULCpMsCQ@mail.gmail.com> <547937AB.1030706@radel.com>

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Jon Radel wrote:

> On 11/28/14, 8:26 PM, Michael Sierchio wrote:
>> I've always found it amazingly absurd that you use a UPS (a bank of
>> batteries charged by AC->DC conversion), invert it back to AC, which gets
>> converted to DC for the motherboard and peripherals.
>>
>> But that's just me, probably.
> 
> Hardly.  See
> http://hightech.lbl.gov/dc-powering/
> https://gigaom.com/2012/01/13/the-next-big-thing-for-data-centers-dc-power/
> etc.  It's not storming the world, but some are doing it.


Google's been doing it for years:

http://www.cnet.com/news/google-uncloaks-once-secret-server-10209580/

-Mike






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