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From: Michael Powell <nightrecon@hotmail.com>
Subject: Re: UPS for FreeBSD
Date: Thu, 27 Nov 2014 13:27:06 -0500
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Alejandro Imass wrote:

> Hi,
> 
> I'm looking to buy a UPS for a server I have at home that will work with
> FreeBSD and can signal for server via USB to gracefully shutdown when
> power goes out.
> 
> Do any of these work with FreeBSD via USB?
> 
> - CyberPower Standby CP425SLG UPS
> - CyberPower Standby CP550SLG UPS
> - Tripp Lite ECO Series 350VA UPS
> - Tripp Lite ECO Series 550VA UPS
> 
> Or any other off-the-shelf inexpensive UPS that I can buy at Staples or
> Best Buy that will work with FreeBSD via USB to shut down the server
> gracefully.
> 

Been looking at the CyberPower ones myself lately. If this is for a desktop 
type box with an active PFC power supply go pure sine-wave. The higher the 
efficiency rating of the power supply the more touchy they are wrt the non 
pure sine wave variety.  Almost all modern desktop power supplies today are 
active PFC, so the pure sine-wave is becoming a 'must-have'.

-Mike