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Date:      Tue, 15 Oct 2013 09:31:46 -0600 (MDT)
From:      Warren Block <>
To:        yudi v <>
Subject:   Re: UPS buying suggestion
Message-ID:  <>
In-Reply-To: <>
References:  <>

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On Tue, 15 Oct 2013, yudi v wrote:

> I am planning on buying an UPS to protect my HP microserver
> n40l<>,
> it will be running FreeBSD 9.2 RELEASE.
> I am looking at
> APC Power-Saving Back-UPS ES 8 Outlet 700VA 230V AS
> 3112<>;
> is that supported by apcupsd? (already tried apcupsd mailing list, there
> was no response, hence asking here)
> If not, please recommend one that is supported.
> The HP server has a 150W PSU and the UPS is rated at 400Watts, and it comes
> with USB monitoring support.

I recommend the older APC Smart-UPS SUA1500, available either in 
standalone or rackmount styles.  The standalone style takes two large 
18AH batteries, the rackmount takes four of the standard 12V 8AH 

These are very expensive UPS systems when new, but can sometimes be 
found at school and local government auctions for about 3% of retail 
price.  The batteries are always bad, but not difficult to replace. 
Well, the rackmount ones are stuck in with double-sided tape, and take 
some convincing.  These are standard sealed lead-acid batteries, used 
for building emergency lights, alarm systems, and well, computer UPSes.

The advantages of the older SUA1500 are sinewave output, correct battery 
charging for long battery life, metal construction, a fan that only 
turns on when needed, and USB and serial monitoring connections. 
sysutils/apcupsd works well with them, and they are large enough to 
power multiple computers.  The UPS is connected via USB or serial to one 
machine, and the others speak to it over the network.  For me, this is 
easier to set up and more functional than the expensive network 
management cards available for the smart card slot in the UPS.

The smaller Smart-UPS line aren't bad.  Only the ones from 700VA on up 
have sinewave output.

The Back-UPS units are better than nothing, but avoid the fat power 
strip style.

> Also, how to measure exact power consumption by a device?

The "Kill-A-Watt" meters are popular and inexpensive.

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